242 Mr. T. D. A. Cockerell—Deseriptions 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 
T. itama. Possibly the specimen is somewhat immature, 
but it may well represent a distinct race. 
Trigona melanocephala, Gribodo. 
Sandakan, Borneo (Baker, 9588). 
Trigona geissleri, Friese, variety a. 
A male from Sandakan, Borneo (Baker, 9387), differs in 
having the hind tibiz narrower and the tegule 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 7. iridipennis by the dusky 
wings, 
Trigona confusella, sp. 1. 
Trigona geisslert, Singapore specimens, Cockerell, Ann. & Mag. Nat. 
Hist., Oct. 1918, p. 388. 
Worker.—Length 4—4°5 mm. 
Black, with broad abdomen, which may be dark brown or 
pure black; wings long, very distinctly reddish, but not 
dark, with clear light ferruginous stigma and nervures ; 
mandibles and labrum red ; clypeus dusky red ; face covered 
with thin pale greyish tomentum ; antenne ferruginous, 
more or less dusky above; tegule dark reddish ; front and 
mesothorax polished ; scutellum strongly projecting, with 
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. 0. 
Worker.—Length about 65 mm., anterior wing 6°5 mm, 
Shining black, with the abdomen fulvo-ferruginous, the 
apical part somewhat dusky ; head large; mandibles black ; 
