164 HYMENOPTERA. 



Head large, wider than the thorax or abdomen, finely longitudi- 

 nally strigose ; the mandibles striated, their teeth and margins 

 black ; the eyes and antennae black, the latter sometimes fusco- 

 ferruginous, the tip of the scape ferruginous. Thorax striated, 

 obliquely so at the sides, and transversely so above ; the meta- 

 thorax with a broad deep longitudinal channel, which is trans- 

 versely striated, not spined. Abdomen ovate, the nodes of the 

 petiole rugose ; the entire insect thinly sprinkled with pale pu- 

 bescence. 



Male. Length 3|-4 lines. Black and shining, pubescent : 

 the tips of the antennae and the apical joints of the tarsi pale rufo- 

 testaceous. Head small, much narrower than the thorax, eyes 

 prominent ; the wings colourless and iridescent, with the nervures 

 rufo-testaceous, the stigma darkest. Abdomen very black and 

 shining. 



Hab. Northern India. 



11. ATTA BELLICOSA. B.M. 



Worker. Length 3 lines. Ferruginous and shining : head 

 very large, deeply emarginate behind, and with a central longi- 

 tudinal channel ; the clypeus smooth and shining ; the face lon- 

 gitudinally striated anteriorly, the head behind transversely so ; 

 the mandibles very stout, their inner margins smooth and black, 

 with a single notch at their apex, striated at their base and apex, 

 and punctured in the midddle. Thorax, legs and base of the ab- 

 domen rather paler than the head ; the former rounded in front, 

 narrowed behind, and deeply strangulated between the meso- and 

 metathorax, the latter armed with two acute spines. 



Worker minor. Only differs in being smaller, in having the 

 mandibles toothed on their inner edge, in the head being smooth 

 behind, and in being altogether of a paler colour. 



Ha b. Birmah. 



12. ATTA PENETRANS. B.M. 

 Female. Length 4 lines. Head and thorax black and shining, 



abdomen dark rufo-piceous. Head longitudinally striated; the 

 mouth, clypeus and antennae ferruginous. Thorax elongate- 

 ovate ; the prothorax in front and the legs ferruginous, the striae 

 on the disk intermixed with oblong punctures, a smooth impunc- 

 tate line in the middle of the thorax in front ; the metathorax 

 truncate, the truncation smooth and shining ; the wings subhya- 

 line, with a fuscous line along the costal nervure, the apical mar- 

 gins of the wings with a fringe of fine white hairs. Abdomen : 



