Brazilian Honey Bees, 507 



2. Trigona Ciipira. 



T. nigra, Isevis et nitida; clypeo punctis cluobus ; mandibulis 

 tarsisque apicalibus ferrugineis ; alis sub-hyalinis. 



Worker. Length 2| lines. Black, smooth and shining ; the 

 clypeus with two oblong spots ; a spot between the antennae, the 

 extreme base of the scape and the mandibles ferruginous, inclining 

 to orange in some individuals ; an obscure pale line at the inner 

 orbit of the eyes, observable in particular positions ; the scape, 

 excepting the two basal joints, fusco-ferruginous, palest beneath. 

 The three apical joints of the tarsi ferruginous ; the wings hyaline, 

 with a slight fulvous tint, the nervures ferruginous, in some indi- 

 viduals darkest towards the base. Abdomen black, with the 

 basal margins of the apical segments sometimes more or less rufo- 

 piceous. In some examples the femora, or both femora and 

 tibiae, are obscurely rufo-piceous. The mandibles not toothed. 



3. Trigona Jaty. 



T. capita thoraceque nigris ; pedibus abdomineque ferrugineis, 

 tibiis posticis apice nigris ; alis hyalinis. 



Male, Length 2| lines. The head and thorax black; the an- 

 tennae ferruginous, the flagellum slightly fuscous above ; the face 

 covered with white downy pile ; the clypeus and mandibles yel- 

 low, or reddish-yellow, the latter black at their extreme base. 

 Tiie tegulse and legs ferruginous, the posterior tibiae at their apex 

 and the basal joint of the tarsi black ; the lateral margins of the 

 mesothorax narrowly, and the scutellum pale rufo-testaceous, the 

 latter fringed with pale pubescence ; the wings hyaline and 

 iridescent ; the thorax on the sides and beneath clothed with 

 cinereous pubescence. Abdomen ferruginous, narrow and elon- 

 gate, nearly linear, slightly widened at the base ; in some exam- 

 ples darkest towards the apex. 



4. Trigona bipunctata. (Canudo). 



T. nigra ; facie plagis duabus flavis, clypeo mandibulisque ferru- 

 gineis ; alis hyalinis ; abdomine apice obscure ferrugineo. 



Worker. Length 2| lines. Black; the flagellum fulvous beneath; 

 the clypeus, labrum and mandibles ferruginous, the latter black at 

 their base ; a yellow spot on each side of the face at the lateral 

 margins of the clypeus ; a yellow line on the inner margin of each 

 cheek beneath ; a fine cinereous, downy pubescence covers the 

 face above the clypeus, and also the thorax on the sides and 

 beneath. The wings hyaline, with their nervures pale ferruginous, 



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