508 Mr. F. Smith's Descriptions of 



Abdomen varies greatly in colour, obscurely ferruginous, with 

 only the basal segment and middle of the basal margin of the 

 second segment black, with the two or sometimes the three basal 

 segments nearly black ; in others the abdomen obscurely ferru- 

 ginous, as well as the metathorax. The scutellum in this variety 

 is usually pale ferruginous. Mandibles not toothed. 



The variety last mentioned is probably immature, but all are 

 from one nest, 



5. Trigofia recursa. (Vamos embora.) 

 T. nigra ; facie pube cinerea vestita ; abdomine obscure rufo- 



variegato ; alis hyalinis. 

 Worker. Length 3 lines. Black ; the face and cheeks covered 

 with a fine downy cinereous pile ; the extreme base of the scape 

 rufo-piceous, the flagellum obscurely fulvous beneath ; the tips of 

 the mandibles rufo-piceous. The wings hyaline, the nervures 

 pale ferruginous, the costal nervure dark brown ; the apical joint 

 of the tarsi ferruginous ; the posterior tibias obscurely ferruginous 

 within. Abdomen elongate, tapering towards the apex; in some 

 examples the segments are more or less variegated with obscure 

 ferruginous tints. The mandibles with thi-ee or four stout acute 

 teeth at their apex. 



6. Trigona Tataira. 



T. flavescenti-rufa ; thorace nigro ; scutello pallide ferrugineo ; 

 alis hyalinis. 



Male. Length 2g lines. Of a reddish-yellow; the head usually 

 much redder than the abdomen, and rather wider than the thorax ; 

 the scape, and the flagellum beneath, rufo-ferruginous ; the eyes 

 red. Thorax black, sometimes with an obscure testaceous broad 

 stripe running down the centre of the mesothorax, and uniting 

 with the pale colouring of the scutellum ; the tegulae pale tes- 

 taceous ; the wings hyaline, their nervures rufo-testaceous ; the 

 intermediate and posterior tibiae and tarsi usually more or less 

 fusco-ferruginous. Abdomen reddish-yellow. The mandibles not 

 toothed. 



In some examples the metathorax is rufo-testaceous. 



7. Trigona Tubiba. 



T. nigra, opaca ; capite antice et metathorace postice pube 



cinerea vestitis ; alis sub-hyalinis, apice fuscis. 

 Worker. Length 2| lines. Opaque-black ; the flagellum fulvous 



