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POLISH ACADEMY OF SCIENCES MUSEUM AND INSTITUTE OF ZOOLOGY 



MEMORABILIA 



MEMORABILIA ZOOL. 



ZOOLOGICA 



207-217 



Alexandr G. RADCHENKO 

New Palaearctic species of the genus Myrmica LATR. 
(Hymenoptera, Formicidae) 



Abstract. Four new species are described: Myrmica pisarskii (Mongolia and Southern Siberia; similar to 
M. kasczenkoi Ruzs.), M. zojae (SE Altai; similar to M. lobicornis NYL.), M. transsiblrica (Siberia from Altai 
to Pacific Ocean; similar to M. bicolor KUPIAN. and M. kasczenkoi), and M. tschekanovskii (Eastern Siberia; 
similar to M. arnoldii DLUSSKY). M. pisarskii, M. zojae and M. transsibirica belong to the lobicornis group, 
and M. tschekanovskii to the arnoldii group (the subgenus Dodecamyrmica sensu K. ARNOLDI 1968). 

In a preceding paper (RADCHENKO, in press) a survey of the genus Myrmica LATR. 
has been given and 9 groups of Palaearctic species have been established: rubra, 
rugosa, scabrinodis, lobicornis, schencki, luteola, arnoldii, carinata, and ritae; all 
socially parasitic species have been provisionally placed in a separate, tenth group. 
So far, nearly 70 Palaearctic Myrmica good species are known. Four of these, from 
different regions of Siberia and the Far East, are described below. 

Measurements and indices used: 

- HL (Head length) - the length of the head in full-face view, measured in a straight line from the ante- 
rior point of the median clypea! margin to mid-point of the occipital margin; 

- HW (Head width) - the maximum width of the head in full-face view, measured behind the eyes (ex- 
cluding the eyes!); 

- SL (Scape length) - the maximum straight-line length of the antennal scape; 

- FW (Frons width) - the maximum distance between frontal carinae; 

- FLW (Frontal lobe width) - the maximum width of frontal lobes; 

- AL (Alitrunk length) - the diagonal length of the alitrunk in lateral view from the posterior base of 
the metapleural lobes to the anterio-dorsal border of the promesonotum (in females and males) or to 
the anterior border of the neck shield (in workers); 

- CI (Cephalic index) = HL:HW; 

- SI (Scape index) = HL:SL; 

- FI (Frontal index) = FLW:FW; 

- FLI (Frontal lobe index) = HW:FLW; 

The material examined belongs to the following institutions: 
ZM - Zoological Museum of Moscow University, Moscow; 
IZ - Institute of Zoology, Ukrainian Academy of Sciences, Kiev; 
MUZ - Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw. 



A. G. RADCHENKO 



Myrmica pisarskii sp. n. 

M. saposhnikovi Ruzs.: PISARSKI 1969a: 228, PISARSKI 1969b: 296, DLUSSKY, PISARSKI 1970: 85, nee 
RUZSKY 1905. 

Holotype, worker: AL 1.50; HL 1.02; HW 0.90; SL 0.77; FW 0.34; FLW 0.45 mm (Figs 1-4). 

Paratypes, workers: AL 1.36-1.57; HL 0.85-1.06; HW 0.76-0.97; SL 0.69-0.84; FW 0.32-0.36; FLW 
0.42-0.50 mm. 

Head somewhat elongate (CI 1.10-1.16), with convex sides, feebly rounded occi- 
pital corners and straight occipital border. Median portion of clypeus slightly 
prominent anteriorly. Frontal carinae moderately curved, frons relatively narrow (FI 
1.28-1.40; FLI 2.48- 2.75). Antennal scapes relatively short (SI 1.24-1.35), abruptly 
curved basally, possessing small transversal lobe or teeth. Antennal sockets surro- 
unded by arched rugae. Frons coarsely longitudinally rugulose, lateral parts of 
dorsum of head with wavy rugae and loop-like sculpture. 

Alitrunk in side view low, with faint mesopropodeal impression, which is frequ- 
ently lacking. Propodeal spines thin, acute at apex, slightly extended at base, feebly 
curved downwards and out backwards. Petiolar node low, massive, its anterior face 
slightly concave and meeting with dorsal face under feebly rounded angle; dorsal area 
indistinct, fluently merged with posterior face. Postpetiole higher than petiole. 
Alitrunk and pedicel coarsely rugulose. 

Body with dense long standing hairs. Alitrunk, pedicel and antennal scapes 
reddish-brown, head and gaster dark brown. 

Paratypes, females: AL 1.76-1.92; HL 1.06-1.16; HW 0.98-1.08; SL 0.83-0.87 mm (Figs 5-8). 

Head somewhat elongate (CI 1.08-1.10), with slightly convex sides and rounded 
occipital corners; anterior clypeal border straight. Frontal carinae more feebly curved 
than in workers, frons broader (FI 1.23-1.25; FLI 2.46-2.48); antennal sockets 
surrounded by arched rugae. Shape of antennal scapes as in workers, SI 1.29-1.33. 
Frons and vertex coarsely longitudinally rugulose, lateral parts of dorsum of head 
and occiput with wavy rugae. 

Propodeal spines straight, acute, feebly extended at base. Anterior face of petiolar 
node slightly concave, dorsal area distinct, slightly sloping; postpetiole higher than 
petiole. 

Sides of alitrunk, scutum and scutellum coarsely longitudinally rugulose. Body 
with numerous standing hairs. Colour reddish-brown, appendages lighter. 

Paratypes, males: AL 1.54-1.85; HL 0.81-0.94; HW 0.70-0.90; SL 0.64-0.69 mm (Figs 9-12). 

Head somewhat elongate (CI 1.05-1.08) with convex occipital border and widely 
rounded occipital corners. Antennal scapes long (SI 1.22-1.36), abruptly curved 
basally with distinct small angles. Frons finely longitudinally rugulose, other parts 
of dorsum of head densely punctate. Head with numerous standing hairs; antennal 
scapes with short hairs, their length no more than half the maximum thickness of 
scapes. 

Mesopleurae finely densely rugulose, sides of propodeum with moi;e coarse rugu- 
losity; prothorax densely punctate. Scutum finely longitudinally rugulose and punc- 



NEW SPECIES OF M YRMICA 




Figs 1-12. Myrmica pisarskii sp. n.: 1^1 - worker (holotype), 5-8 - female (paratype), 9-12 - male 
(paratype); 1, 9 - body in profile, 5 - alitrunk and pedicel in profile, 2, 6, 10 - head from above, 3, 7, 11 - 
antenna! scapes, 4, 8, 12 - hind tibiae. 



A. G. RADCHENKO 



tate, scutellum with more coarse transversal arched rugae. Propodeum with short 
rounded teeth. Mesonotum, pedicel and gaster with numerous standing hairs; hind 
tibiae with long subdecumbent or suberect (not standing!) hairs. Colour brown, 
appendages lighter, wings yellowish. 

Type localities. Holotype worker: Transbaikaliens, Chitinskaya obi., Daursky Natural Reserve, 
Irelgin, steppe, nest under a stone, No. 5 1-90, 7 VII 1990 (A. RADCHENKO) (IZ).Paratypes: 10 workers from 
the same nest; 2 workers, the same locality, No. 51-90, 7 VII 1990 (A. RADCHENKO); Chitinskaya obi.: 5 
workers, Borzia, No. 3-90, 28 VI 1990 (A. RADCHENKO); 9 workers, left bank of river Onon, near village of 
N. Tsassuchei, No. 75-90, 12 VII 1990 (A. RADCHENKO); workers, Borzinsky distr., Mt. Adon-Cholon, 1000 
m, No. 92-90, 17 VII 1990 (A. RADCHENKO); 4 workers, village of N. Tsassuchei, No. 1-90, 28 VI 1990 (A. 
RADCHENKO); 2 workers, the same locality, pine forest, 12 VII 1990 (A. RADCHENKO); 7 workers, Ononsky 
distr., Mt. Kuku-Chodan, No. 113-90, 19 VII 1990 (A. RADCHENKO); 15 workers, 6 males, SE Altai, 
Kuraiskaya kotlovina, steppe, Nos. 552, 580, 609, 612, 614, 638, 1 VI-8 VIII 1964 (Z. ZHIGULSKAYA); 
Mongolia: 2 workers, 1 female, 4 males, Central Aimak, Kerulen, 45 km E of Samon Bajanderler, 1400 m, 
exped. KASZAB, No. 304, 26 VII 1965; 3 workers, 3 males, Uburcharipai Zuil, Od Bijar, 7-8 VIII 1985; 1 
worker, Tevtrulech, 17 VII 1979; 1 worker, Kiransky Karaul, 4 VIII 1908 (CHOMOS); 4 workers, Ara-Chan- 
gajsky Aimak, lake Uchish-Noor (A. PONOMARENKO); Tuva: 2 workers, Kiachta, No. 1135, 2 VIII 1962 (Z. 
ZHIGULSKAYA); 2 workers, the same locality, No. 1175, 6 VIII 1962 (Z. ZHIGULSKAYA); 9 workers, near Kysyl, 
No. 18, 13 VI 1961 (Z. ZHIGULSKAYA); 3 workers, Ubsu-Noorskaya kotlovina, lake Dus-Hol, No. 297, 25 VII 
1962 (Z. ZHIGULSKAYA); 10 workers, 2 females, the same locality, 10 km N of lake Ters-Hol, No. 160, 7 VI 
1962 (Z. ZHIGULSKAYA); 10 workers, same locality, 3 km S of village Torgalyk No. 220, 25 VI 1962 (Z. 
ZHIGULSKAYA); 2 males, the same locality, Shevelych-Hem, No. 316, 1 VII 1962 (Z. ZHIGULSKAYA); 9 workers, 
left bank of river Enisei, No. 389, 6 IX 1962 (Z. ZHIGULSKAYA); 2 workers, 2 males, Mt. Tannu-Ola, village 
of Samagaltai, dry steppe, 7 VIII 1978 (J. REZNIKOVA); Transbaikaliens: 1 worker (Th. LUKYANOVITSCH); 1 
worker, Troitskosavsk, 11 VII 1928 (Th. LUKYANOVITSCH); 1 worker, Enchor, 20 VII 1928 (Th. LUKYANO- 
VITSCH); 1 worker, Minusinsk, 10 VI 1936 (Th. LUKYANOVITSCH); 2 workers, Chita, 15 VI 1912 (GYTELMAN) 
(IZ, ZM, MilZ). 

Comments. Lobes at base of antennal scapes from large to small, dentiform; 
dorsal area of petiolar node from short, sloping, fluently merged with posterior face 
to long and nearly horizontal; mesopropodeal impression sometimes almost absent. 

M. pisarskii belongs to the lobicornis group and is closely related to M. kasczenkoi 
RUZS.; it differs from it by a narrower frons and the presence of a lobe at the base of 
the antennal scapes. From other species with lobes at the base of the antennal scapes 
(M. lobicornis, M. forcipata KARAW., M. jessensis FOR.) it differs by combinations of 
characters (shape of petiolar node and propodeal spines, width of frons, body sculp- 
ture, etc.). M. pisarskii inhabits the steppe and forest-steppe regions of Southern 
Siberia and Mongolia. It is one of the most xerophilous species of the genus Myrmica. 
Nests in soil, often under stones. Nuptial flight in July-August. 



Myrmica zojae sp. n. 

Holotype, worker: AL 1.34; HL 0.99; HW 0.85; SL 0.84; FW 0.29; FLW 0.38 mm. 
Paratypes, workers: AL 1.34-1.47; HL 0.94-1.05; HW 0.81-0.94; SL 0.78-0.90; FW 0.28-0.32; FLW 
0.36-0.41 mm (Figs 13-15). 

Head elongate (CI 1.12-1.18), with slightly convex sides, narrowly rounded 
occipital corners and straight occipital border. Anterior clypeal margin straight or 
very feebly convex. Frontal carinae strongly curved, frons narrow (FI 1.27-1.35, FLI 
2.83-3.10), antennal sockets surrounded by arched rugae. Antennal scapes modera- 
tely long (SI 1. 17-1.24), abruptly curved basally, forming right angle, with large lobes, 



NEW SPECIES OF MYRMICA Z 1 i 



stick out forwards and upwards. Frons coarsely longitudinally rugulose, occiput and 
temples with coarse wavy rugae. 

Alitrunk with faint mesopropodeal impression, which is frequently lacking. Pro- 
podeal spines short, straight, acute at apex, slightly extended at base. Petiole with 
short cylindrical part, anterior face of petiolar node slightly concave, meets with 
dorsal face under rounded angle, dorsal area indistinct, sloping, petiolar node in side 
view wedge-form. Postpetiole high, short, its length 1.7-1.8 times less than height. 




Figs 13-22. Myrmica zojae sp.n.: 13-15 - worker (holotype), 16-18 - female (paratype), 19-22 - male 
(paratype); 13, 16, 19 - alitrunk and pedicel in profile, 14, 17, 20 -head from above, 15, 18, 21 - antennal 

scapes, 22 - hind tibiae. 



A. G. RADCHENKO 



Alitrunk and pedicel strongly longitudinally rugulose. Body with numerous stan- 
ding hairs; antennal scapes and tibiae with numerous, rather coarse suberect hairs. 
Alitrunk, pedicel and appendages reddish-brown, head and gaster darker. 

Paratype, female: AL 1.82; HL 1.13; HW 1.2; SL 0.88 mm (Figs 16-18). 

Shape of head, frontal carinae, frontal lobes and scapes as in workers. 

Sides of alitrunk longitudinally rugulose, rugae more coarse on propleurae and 
propodeum; scutum and scutellum longitudinally rugulose. Propodeal spines short, 
strongly extended at base. Anterior face of petiolar node straight, not concave; node 
in side view sharply angulate, with distinct sloping dorsal area. Pilosity and colour 
as in workers. 

Paratype, male: AL 1.65; HL 0.79; HW 0.76; SL 0.64 mm (Figs 19-22). 

Head somewhat elongate (CI 1.04), occipital corners narrowly rounded, occipital 
border slightly convex. Anterior clypeal margin straight. Antennal scapes moderately 
long (SI 1.22), abruptly curved basally at obtuse angle. Dorsum of head densely 
punctate, fine rugulosity on frons only. Head with numerous standing hairs. External 
margin of antennal scapes with numerous suberect hairs, their length somewhat 
longer than maximum diameter of scapes; inner margin of scapes with dense 
subdecumbent pilosity. 

Sides of alitrunk punctate, only lower parts of mesopleurae and propodeum with 
fine rugulosity. Scutum and scutellum densely punctate, with short fine rugulosity 
on scutum; space between notaulae smooth and shining. Propodeum with short acute 
triangular teeth. Petiole high, not lower than postpetiole, its node cubiform with 
convex, rounded dorsal face. 

Alitrunk (except propodeum) and gaster with relatively sparse, short standing 
hairs. Hind tibiae with dense standing hairs. Colour brown, gaster dark brown. 

Type localities. Holotype worker: the SE Altai, Kuraiskaya kotlovina, No. 572, 9 VI 1964 (Z. 
ZfflGULSKAYA).Paratypes: 19 workers, 1 female, 1 male, the same locality, Nos. 546, 572, 575, 617, 638, 657, 
VI-VII 1964 (Z. ZHIGULSKAYA) (ZM, IZ). 

Comments. M. zojae greatly resembles M. lobicornis', it differs from it by the 
shape of the lobes on the antennal scapes, the shape of the petiolar node and short 
propodeal spines. Xerophilous steppe species. 

Myrmica transsibirica sp. n. 

Holotype, worker: AL 1.53; HL 1.04; HW 0.90; SL 0.84; FW 0.38; FLW 0.42 mm. 
Paratypes, workers: AL 1.48-1.54; HL 1.01-1.13; HW 0.85-1.02; SL 0.80-0.90; FW 0.35-0.45; FLW 
0.38-0.50 mm (Figs 23-26). 

Head slightly elongate (CI 1. 10-1. 18), with nearly parallel sides, rounded occipital 
corners and straight occipital border. Clypeus with straight or feebly convex anterior 
margin. Frontal carinae feebly curved, frons broad (FI 1.07-1.15, FLI 2.28-2.59). 
Antennal scapes relatively short (SI 1.21-1.36), abruptly curved basally, not posses- 
sing lobes, sometimes with a faint angle only. Antennal sockets surrounded by arched 



NEW SPECIES OF MYRMICA 



rugae. Dorsum of head mostly densely longitudinally rugulose, lateral parts of head 
with wavy rugae. 

Alitrunk with distinct mesopropodeal impression. Propodeal spines moderately 
long, straight or slightly curved downwards, acute, extended at base. Petiole with 
cylindrical part, anterior face of petiolar node concave, dorsum of node in side view 
not angulate, widely rounded or with indistinct area. Sides of alitrunk with numerous 













26? 



\ 32 




Figs 23-32. Myrmica transsibirica sp. n.: 23-26 - worker (holotype), 27-28 - female (paratype), 29-32 - 
male (paratype); 23 -body in profile, 27, 29 - alitrunk and pedicel in profile, 24, 28, 30 - head from above, 

25, 31 - antennal scapes, 26, 32 - hind tibiae. 



A. G. RADCHENKO 



straight or somewhat wavy rugae. Petiolar node with short wavy rugae and puncture; 
postpetiolar node with more coarse straight rugulosity. 

Body with numerous standing hairs; hairs on antennal scapes rather long, their 
lenght equal or slightly longer than maximum thickness of scapes; hind tibia with 
suberect hairs. Colour fuscous, sides of alitrunk, petiolar and postpetiolar nodes and 
appendages ochraceous-brown. 

Paratypes, females: AI 1.69-1.93; HL 1.04-1.18; HW 0.91-1.04; SL 0.84-0.91 mm (Figs 27, 28). 

Shape of head and form of frontal carinae and frontal lobes as in workers. Antennal 
scapes abruptly curved at base, not angulate and without lobes. Frons and vertex 
with divergent fine numerous rugae, lateral parts of head with wavy rugulosity and 
dense granular sculpture. 

Mesopleurae finely densely rugulose, propleurae, propodeum, scutum and scutel- 
lum coarsely rugulose. Shape of propodeal spines, shape and sculpture of petiolar 
and postpetiolar nodes and colour as in workers. 

Paratypes, males: AL 1.65-1.93; HL 0.83-0.97; HW 0.78-0.85; SL 0.66-0.77 mm (Figs 29-32). 

Head slightly elongate (CI 1.00-1.08), widely rounded behind eyes, occipital 
border feebly convex. Antennal scapes rather long (SI 1.16-1.44), finely curved 
basally, not angulate. Dorsum of head densely punctate, very fine touch-like rugulo- 
sity on central part of frons only. Head with sparse, straight, coarse, standing hairs, 
their lenght obviously shorter than maximum thickness of antennal scapes. 

Propodeum without teeth, with triangular tubercles. Propleurae and upper parts 
of mesopleurae finely punctate; lower parts of mesopleurae, sides of propodeum and 
scutum longitudinally rugulose; scutellum coarsely rugulose. 

Alitrunk, nodes of petiole and postpetiole and gaster with numerous short straight 
standing hairs; hind tibia with suberect hairs. Colour dark-brown, appendages 
reddish-brown. 

Type localities. Holotype worker: Russia, vicinity of Krasnoyarsk, Pogorelsky bor, No. 29, 1964 
(V. DMITRENKO) (ZM). Paratypes: 11 workers from the same nest; 65 workers, 1 female, Altai, Nos. 4, 14, 
119, 125, 130, 131, 237, 415, 506, 1988 (L. OMELCHENKO); 13 workers, Altai, 1968 (Z. ZHIGULSKAYA); 2 
females, 2 males, Altai, Kuraiskaya kotlovina, No. 441, 10 VIII 1963 (Z. ZHIGULSKAYA); 6 workers, Altai, 
Chuiskaya kotlovina, Nos. 537, 549, 18 and 27 VI 1964 (Z. ZHIGULSKAYA); 1 worker, Altai, Unzezia on river 
Katun', 15 VIII 1909 (GoRCHAKOVSKY); 1 worker, Chakassia, V 1974; 2 workers, Minusinsk, No. 1286, V 
1974; 6 workers, E. Siberia, river Bogdashka, near river Angara, 21 VI 1873 (GoRTUNG); 4 workers, 1 
female, 1 male, Ulan-Ude, Nos. 1118, 1124, 1 VIII 1972; 3 workers, Irkutskij distr., village of Zun-Murino, 
No. 295, 10 VIII 1965 (A. PLESHANOV); 10 workers, Chitinskaya obi., Stretenskij distr., Ust'-Dunaevo, Pad' 
Kulinda, 10 IX 1957 (G. DLUSSKY); 195 workers, Evreiskaya AO, Mt. Obluchje, 40 km S of village of 
Pashkovo, 2-16 VI 1978 (ToMs); 20 workers, 1 female, Amurskaya obi., river M. Para - river B. Ergel, 5 
IX 1958 (ZINOVIEV); Primorsky Kraj: 9 workers, Khankaiskij distr., Sintuche, 1 V 1972 (A. KUPIANSKAYA); 
9 workers, Barabach-Levada, 9 V 1972 (A. KUPIANSKAYA); 23 workers, 4 males, Kedrovaya Pad', 5 V 1971, 
18 DC 1973, 16 VI 1975 (A. KUPIANSKAYA); 2 workers, 1 male, same locality, 6 IX 1964 (G. DLUSSKY); 8 
workers, Tetuchinskij distr., rivers Iman and Krasnaya, 4 DC 1971 (A. KUPIANSKAYA); 13 workers, 
Dalnegorskij distr., Tetuche-Pristan', lake VasTcovka, 26 VI 1972 (A. KUPIANSKAYA); 7 workers, Pejshula, 
Zmeinaya Gorka, 21 VII 1969 (A. KUPIANSKAYA); 11 workers, Sudzuche, bukhta Kut, 5 VIII 1946 (SHAROV); 
Suvorovo, 24 VI 1972 (ZHERYCHIN); 4 workers, vicinity of Vladivostok, 5 V 1989 (L. RYBALOV); 1 female, 
lake Hanka, 2 IX 1986 (A. KOTENKO); 4 workers, Sakhalin, vicinity of Juzhno-Sakhalinsk, 25 VII 1975 (A. 
KUPIANSKAYA); 2 workers, Sakhalin, village of Matrosovka, 9 VIII 1986 (S. BASARUKIN); Kunashir: 3 



NEW SPECIES OF MYRMICA 



workers, Alechino, 23 VIII 1875 (TlKHOMIROVA); 3 workers, TVetiakovo, 21 VIII 1975 (TlKHOMlROVA); 11 
females, 2 males, lake Goriachee, volcano Golovina, 9 VIII 1970 (TlKHOMIROVA) (ZM, IZ). 

Comments. M. transsibirica belongs to the lobicornis group and differs from 
other species with a not angulate base of the antennal scapes (M. kasczenkoi, M. 
bicolor KUPIAN., M. angulinodis RUZS.) by broad frons, the head and alitrunk 
sculpture and the shape of the petiolar node. Changeable species; body size, shape of 
petiole and colour fairly variable. Wide-spread on the Siberian tajga species, inhabits 
coniferous forests, in the mountains up to 1000-2000 m. Nuptial flight in August- 
September. 

Myrmica tschekanovskii sp. n. 

Holotype, male: AL 1.89; HL 1.03; HW 1.03; SL 0.73 mm (Figs 33-36). 

Head subsquare (CI 1.0), with rounded occipital corners, broad and straight 
occipital border. Median portion of clypeus not prominent anteriorly, its anterior 
margin straight. Antennal scapes relatively long (SI 1.40), weakly curved basally, not 
angulate, with short numerous standing hairs. Antennae with 12 segments. Entire 
dorsum of head finely longitudinally rugulose and punctate between rugae. 

Sides of alitrunk with touch-like rugulosity. Node of petiole high, rounded above. 
Petiole and postpetiole densely punctate and with short touch-like rugulosity. Meso- 
notum and pedicel with numerous standing hairs; hind tibiae and tarsi with short 
subdecumbent hairs. 

Colour reddish-brown (apparently the specimens studied have lost their colour - 
they are more than 100 years old). 

Paratype, worker: AL 1.47 HL 1.05; HW 0.92; SL 0.84; FW 0.38; FLW 0.43 mm (Figs 37-39). 

Head elongate (CI 1.14) with parallel sides; occipital border slightly concave. 
Median portion of clypeus slightly convex anteriorly. Frontal carinae feebly curved, 
frons wide (FI 1.15, FLI 2.44). Frontal carinae merged with rugae reaching occipital 
border; antennal sockets surrounded by arched rugae. Antennal scapes relatively 
long, weakly curved basally but angulate, with short subdecumbent hairs. Entire 
dorsum of head finely rugulose to reticulate-rugulose on temples. 

Alitrunk with mesopropodeal impression, propodeal spines acute, thin, slightly 
extended at base. Petiole with well developed cylindrical part, its node triangular in 
profile. Subpetiolar process feebly developed. Alitrunk sparsely longitudinally rugu- 
lose. 

Alitrunk, petiole and postpetiole with dense standing hairs. Colour of alitrunk 
ochraceous, head and gaster darker. 

Type locality. Holotype male: Eastern Siberia, river Nizhniaya Tunguska near river Enisei, 
6440TSr, 5 VIII 1873 (TscHEKANOVSKY) (ZM). Paratype worker: the same locality and date (ZM). 

Comments. M. tschekanovskii belongs to the arnoldii group (the subgenus 
Dodecamyrmica sensu K. ARNOLDI 1968). The male differs from M. arnoldii DLUSSKY 
by long antennal scapes (SI 1.40; SI of M. arnoldii 2.55-2.62). The worker differs by 



A. G. RADCHENKO 



the length of the scapes (SI 1.25; SI of M. arnoldii 1.42-1.50) and by their shape (the 
scapes of M. arnoldii are not angulate at the base) and feebly developed the 
subpetiolar process (see Figs 37, 40). 







r i^^jjY" i ,_ 

35 



Figs 33-39. Myrmica tschekanovskii sp. n.: 33-36 - male (holotype), 37-39 - worker (paratype); 33, 37 - 

alitrunk and pedicel in profile, 34 - head from above, 35, 38 - antenna! scapes, 36, 39 - hind tibiae; 

Fig. 40 -M arnoldii DLUSSKY: worker pedicel in profile. 



REFERENCES 

ARNOLD! K V. 1968. Vazhnye dopolneniya k mirmekofayne (Hymenoptera, Formicidae) SSSR i opisanie 

novykh form. Zool. Zh., Moskva, 47: 1800-1822. 

DLUSSKY G. M., PISARSKI B. 1970. Formicidae aus der Mongolei. Mitt. Zool. Mus. Berlin, 46: 85-90. 
PISARSKI B. 1969a. Fourmis (Hymenoptera: Formicidae) de la Mongolie. Fragm. faun., Warszawa, 16: 

221-236. 
PISARSKI B. 1969b. Myrmicidae und Formicidae. In: Ergebnisse der zoologischen Forschungen von Dr. Z. 

KASZAB in der Mongolei (Hymenoptera). Faun. Abh., Dresden, 2: 295316. 
RADCHENKO A. G. Obzor palearkticheskikh murav'ev roda Myrmica (Hymenoptera, Formicidae). Zool. Zh., 

Moskva (in press). 



NEW SPECIES OF MYRM1CA 



RuzsKYM. D. 1905. Murav'e Rossii. Kazan', 800 pp. 



Institute of Zoology, Ukr. Ac. Sci. 
B. Khmelnitsky St 15, Kiev-30 
252601 Ukraine 



STRESZCZENIE 



Nowe palearktyczne gatunki z rodzaju Myrmica LATR. (Hymenoptera, Formicidae) 

Opisane sa. 4 nowe gatunki z rodzaju Myrmica LATR.: Af. pisarskii (Mongolia i Poludniowa Syberia), 
M. zojae (pohidniowo-wschodnia cze&! Attaju), M. transsibirica (Syberia od Artaju po wybrzeze Pacyfiku) 
i M. tschekanovskii (Wschodnia Syberia). Trzy pierwsze gatunki naleza. do grupy Af. lobicornis NYL., 
czwarty - do grupy Af. arnoldii DLUSSKY (podrodzaj Dodecamyrmica sensu K. ARNOLDI, 1968).