1865.] 427 



broader than the thorax ; the cheeks behind and the clypeus in front, 

 with very long, pale-yellowish pubescence ; mandibles large, tinged 

 with piceous, and densely striated longitudinally; eyes small, ovate ; 

 ocelli minute; antennae pale ferruginous, the flagellum clothed with 

 short, pale glittering pubescence, gradually thickened towards the tip. 

 Thorax finely aciculate, the sutures tinged with piceous; metathorax 

 transversely striated, with two acute spines on the posterior face. Wings 

 hyaline, tinged with yellowish at base ; nervures yellowish-testaceous, 

 stigma fuscous ; anterior pair with one complete marginal, two complete 

 submarginal and one complete discoidal cells. Legs clothed with short 

 pale glittering pubescence. Abdomen subglobose, smooth and polished, 

 tinged with honey-yellow, and, as well as the nodes, thinly clothed with 

 short, pale glittering pubescence, more dense on the apical margins of 

 the segments both above and beneath ; first node elongate, subpetio- 

 lated, the posterior half suddenly protuberant and very prominent, the 

 upper anterior edge with a small central tubercle ; second node subglo- 

 bose, broader than the first, both nodes opaque and minutely sculptured. 

 Length 5 lines; expanse of wings 8 lines. 



Worker. — Colored and sculptured similar to the 9 , but the head is 

 very large, more than twice the width of the thorax and larger than 

 the abdomen ; the thorax is narrow and much strangulated about the 

 middle ; the spines of the metathorax are longer and more acute. Length 

 3 lines. 



Two 9 , two $ , specimens. 



2. Myrmica seminigra, n. sp. 



Black, clothed with rather long pale pubescence; mandibles, antennae, most 

 of legs, and the abdomen, fulvo-testaceous : wings hyaline. 



Male. — Head dull black, rather thickly clothed with long pale pu- 

 bescence, under a very strong lens, minutely aciculate; eyes moderate, 

 ovate ; ocelli large ; mandibles rather large, dull ferruginous, and rather 

 coarsely striated ; antennae about as long as the head and thorax, fulvo- 

 testaceous, darker at base. Thorax somewhat shining, black, some- 

 times more or less piceous, clothed with long pale pubescence; sutures 

 of the thorax, tegulae and posterior portion of the scutellum, fulvo- 

 testaceous; metathorax with two short, very obtuse tubercles on the 

 posterior face. Wings as in M. occidentalis 9 . Legs pale piceous, 

 clothed with pale pubescence, the tibiae and tarsi fulvo-testaceous. 

 Abdomen ovate, sometimes almost globose, fulvo-testaceous, smooth 

 and polished, and, as well as the nodes, clothed with pale pubescence 

 especially on the apical margins of the segments ; the nodes much as 

 in occidentalis, except that they are shining, the first node is tinged 



