COLLECTED IN BORNEO, ETC. 77 



the legs stout, with their joints and the tarsi ferruginous. Abdo- 

 men heart-shaped, with the base, in some examples, slightly fer- 

 ruginous. 



Worker minor. Differs only in being one-third smaller. 



Hub. Singapore ; Borneo (Sarawak). 



This species resembles the C. inflatus in form ; but the swollen portion 

 of the thorax is of a solid consistency ; it forms, however, a similar 

 laboratory of saccharine matter; the orifice from which it exudes is 

 not exactly at the posterior angles, but a little way beneath ; in some 

 specimens, masses of crystallized particles can be seen beneath the 

 orifice ; of this species, both large and small workers have been exa- 

 mined, and the same apparatus is found on them both. 



Gen. Atta, Latr. 



1. Atta penetrans. A. eapite thoraceque nigris; abdomine obscure 

 rufo-piceo ; alis subhyalinis ; eapite thoraceque longitudiualiter striatis. 



Female. Length 4 lines. Black and shining; head longitudinally finely 

 striated ; the mouth, clypeus and antennae, ferruginous. Thorax : 

 elongate-ovate, the prothorax anteriorly and the legs, ferruginous ; 

 the thorax above with oblong punctures which run into striae ; an 

 impuuetate line in the middle of the mesothorax anteriorly; the 

 metathorax truncated, the truncation smooth and shining ; wings sub- 

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

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

 elongate-ovate, dark rufo-piceous, the apical margins of the segments 

 brighter ; the nodes of the peduncle globose and punctured. 



Hub. Borneo (Sarawak). 



2. Atta cingulata. A. ferrugiuea; pedibus abdomineque pallide 

 ferrugineis ; eapite maximo, thorace triplo latiore. 



Worker major. Length 1} line. Head very large, ferruginous, the 

 antennae paler ; eyes very small, placed at the sides of the head a little 

 before the middle. Thorax : pale ferruginous, very convex or globose 

 anteriorly, much narrower behind, with two short acute spines on the 

 metathorax; legs pale rufo-testaceous. Abdomen: ovate, with the 

 base truncated, with a fuscous ring in the middle ; the nodes of the 

 peduncle globose. 



Worker minor. About 1 line in length. The head much smaller and 

 more elongate; in colour, resembling the larger worker, and equally 

 smooth and shining ; the abdomen with a fuscous ring in the middle. 



Hab. Borneo (Sarawak). 



Gen. Physatta. 



Head small ; eyes of moderate size, placed a little before the middle ; 

 ocelli in a triangle on the vertex ; mandibles stout and denticulate 



