OBONTOMACnUS. 47 



Key to the Species. 



a. The whole head very tinely and delicately 



striate and having a beautiful silky gloss . O. Itcematodcs, p. 47. 



b. The upper part of the headsmootli or puuctate, 



not striate, no silky gloss. 

 a . The inmost of the three apical teeth on 

 tlie mandible rather narrow, twice as 



long as broad 0. ri.vosits, p. 48. 



h' . The inmost of the three apical teeth on the 

 mandible broad, as broad as long. 

 a-. Head posteriorly only slightly emargi- 



nate, iu no sense bilobed O. monticola, p. 48. 



Ir. Head posteriorly deeply emarginate, 



bilobed O. pioictulatiis, p. 49. 



55. Odontomachus haematodes, Li/oi. (Formica) St/st. Xat. ed. 10, 

 i (1758), p. 582, ^ : Forel, Join: Bomh. JV. H. Soc. xiii (1900), 

 p. 57, 9 . 



^ . Dark castaueous brown, with a fine delicately luinule 

 pubescence, giving it a rich siiky gloss. Head, thorax and the 

 node of the pedicel anteriorly very delicately and finely striate ; 

 abdomen smooth and shining, the posterior margins of the segments 

 testaceous. Pilosity very sparse, consisting of a few scattered 

 erect hairs. Head rather broad, posteriorly ahnost as broad as in 

 front from eye to eye ; the denticulation on the inner margin of 

 the mandibles almost obsolete, the innermost of the apical teeth 

 broad but very short ; the striae on the front divergent posteriorly, 

 the emarginate occiput smooth and polished, not striate, a narrow- 

 impressed line or furrow medially down tlie front of the head to 

 the confluence of the antennal hollows, the face below slightly 

 raised and also with a short impressed longitudinal line ; antennal 

 carinsB short and broad, strongly convergent above. Thorax very 

 little longer than the head w ithovit the mandibles, compressed ; 

 the pronotum constricted anteriorly into a neck, posteriorly round, 

 above convex, tlie striae concentric ; metanotum truucate posteriorly, 

 the striae transverse and somewhat coarser ; legs with the femora 

 and tibiae cylindrical. Node of the pedicel convex in front, flat 

 posteriorly, spine on the top slightly attenuate at base, distinct 

 from the node ; abdomen with a few scattered piligerous punctures 

 and a sparse short recumbent pubescence. 



$ . Very sinnlar, with similar sculpture, larger ; the ocelli 

 entirely wanting ; the abdomen more massive. 



Length, ^ 9-11; § 11-12 mm., without the mandibles; man- 

 dibles 2'5 mm. 



Hal). Sikhim {^Joller); Assam (Long); 3Iadras, Cochin {lioth- 

 ney) ; Travancore {Ferguson) ; Ceylon (Yerburg, Green) -. not 

 recorded from Burma; found, however, in Africa and in America 

 also. 



