242 Mr. T. D. A. Cockerell — Descriptions and 



the face more or less reddish, the malar space largely red, 

 the postscutellum red, and the abdomen reddish brown 

 basally. The wings are somewhat darker than in typical 

 7\ itama. Possibly the specimen is somewhat immature, 

 but it may well represent a distinct race. 



Trigona melanocephala, Gribodo. 

 Sandakan, Borneo {Baker, 9588). 



Triyona geissleri, Friese, variety a. 



A male from Sandakan, Borneo [Baker, 9387), differs in 

 having the hind tibiae narrower and the tegulse redder, but 

 in general it has exactly the characters of geissleri. A 

 worker from the same place [Baker, 9586) has the flagellum 

 black or nearly so above, except at extreme base, and 

 ferruginous beneath. It differs from the Singapore workers, 

 formerly referred to this species, by the darker flagellum, 

 pure black eyes, and dusky sepia-coloured stigma and mar- 

 ginal nervure. It differs from 2\ iridipennis by the dusky 

 wings. 



Trigona confusella, sp. n. 



Trigona geisderi, Singapore specimens, Cockerell, Ann. & Mag. Nat. 

 Hist., Oct. 1918, p. 385. 



Worker. — Length 4-4*5 mm. 



Black, with broad abdomen, which may be dark brown or 

 pure black ; wings long, very distinctly reddish, but nut 

 dark, with clear light ferruginous stigma and nervures ; 

 mandibles and labrum red ; clypeus dusky red ; face covered 

 with thin pale greyish tomentum ; antennae ferruginous, 

 more or less dusky above ; tegulse dark reddish ; front and 

 mesothorax polished ; scutellum strongly projecting, v>'\ih 

 much black hair ; small joints of tarsi ferruginous. 



Singapore (Baker). 



In Bingham^s table this falls in section C, and runs out 

 because the mesothorax is entirely black. 



Trigona sandacana, sp. n. 



Worker. — Length about 6*5 mm., anterior wing 6*5 mm. 

 Shining black, witii the abdomen fulvo-ferruginous, the 

 apical part somewhat dusky; head large; mandibles black ; 



