Records of Bees. 313 



Trigona argyrea, sp. n. 



Worker. — Length slightly over 3 mm. 

 Black, including antenuse and legs, but abdomen (which is 

 short and rather broad) shining dark sepia-brown; head large; 

 face up to antennse flattened, densely covered with short, ap- 

 pressed, brilliantly silver hair; mandibles edentate, black with 

 the apical margin rufous; cheeks small ; front shining, the 

 upper part with rather large sparse punctures, as they appear 

 under a lens, but the microscope shows that they are the bases 

 of black bristles ; vertex with black hair ; posterior ocelli very 

 close to occipital margin ; thorax narrower than head, without 

 light markings, the dorsum shining, with black hair, the 

 mesothorax also with very short strongly plumose pale hairs ; 

 pleura with pale hair ; sides of metathorax minutely pale- 

 tomentose ; hair of legs largely black, but white hair on 

 underside of middle trochanters and basal half of their femora 

 (hind legs broken off in type) ; wings dusky, nervures and 

 stigma dark sepia; tegulte rufo-piceous ; underside of 

 abdomen pale ochreous. 



Hab. Quirigua, Guatemala, one (JV. P. Cockerell). The 

 specimen is labelled " nest in clay bank,'' where it was 

 taken along with a couple of T. cupira, Smith. 



This may be compared with T. hyalinata, Lep., and T. tiibibu, 

 Smith ; differing from both by its very silvery face, from 

 hyalinata also by the smaller size, and from tuhiba by the 

 shining front and mesothorax (these parts in tuhiba are 

 absolutely dull) . T. argentata, Lep., has silvery hair on face, 

 but the wings are clear. 



Trigona zexmenice, sp. n. 



Worker. — Length 7^ to 9 mm. 



Robust, abdomen parallel-sided, not quite so broad asthorax; 

 head and thorax dull black, but the clypeus and supraclypcal 

 area shining and strongly punctured ; labrum ferruginous, 

 more or less bigibbous ; mandibles rufo-piceous, edentate, tl>e 

 broad apical margin sharply marked off and ornamented with 

 elongate punctures ; malar space rather large ; no light face- 

 marks ; front dull and densely granidar, as also are the meso- 

 thorax and scutellum ; antennae black, with the scape red at 

 base and extreme apex, and flagellum dark reddish beneath ; 

 hair of head and thorax above scanty and black, longest on 

 scutellum; edge of mesothorax above tegulse with a narrow 

 d;ill yellow stripe; hair of pleura mostly black, partly pale 

 below; tegulse piceous or rufo-piceous. Wings dusky, with a 



& Mag. N. Hist. Ser. 8. Vol. x. 22 



