316 Mr. T. D. A. Copkerell — Descriptions and 



and anterior and middle tibial ; labram black, mandibles 

 with the apical half rufous; clypeus not much produced, 

 strongly but sparsely punctured, its lower margin rather 

 broadly black ; antennae blacky scape I'ufous at extreme base ; 

 front minutely granular ; cheeks with rather abundant white 

 hair ; mesothorax very brilliant, with extremely minute 

 punctures, sparse in middle, becoming dense only at sides ; 

 anterior angles of prothorax prominent, greater (but not 

 very much greater) than right angles; hair of thorax scanty 

 and pale ; area of metathorax semilunar, with fine plicae 

 which cover little more than the basal half ; apical trunca- 

 tion not distinctly defined above ; tegulae pale rufo-testaceous, 

 with a blue spot. Wings slightly dusky, nervures and the 

 large stigma dark sepia ; third s.m. twice as long as second ; 

 first r. n. joining second t.-c. on entering basal corner of 

 third s.m. ; hind spur with three spines, two very long ; 

 hair on iinier side of hind basitarsus shining mouse-grey. 

 Abdomen broad, shining, very brilliant, the linear hind 

 margins of the segments reddish ; no vibrissse ; much hair 

 on ventral surface of abdomen. The specimens have col- 

 lected an abundance of white pollen on the hind femora and 

 the under surface of the abdomen. 



Hub. Quirigua, Guatemala, six females (JV. P. Cockerell). 

 Three collected Feb. 13, 1912, at flowers of Centroseina 

 plumieri, Bentham. One at flowers of Zexmenia virgulta, 

 Klatt. Two at plant no. 60. 



Quite distinct from all other Guatemalan species by the 

 small size and brilliant colours. It belongs to Vachal's 

 group sericei, and in his table runs to the much larger and 

 otherwise different Angochlora tonsilis {Halictus tonsilis, 

 Vachal), except for the long spines on the hind spur. There 

 is quite a close resemblance to A. cyaneoviridis, Ashm., 

 from St. Vincent ; but Ashmead^s species has the area of 

 metathorax covered with fine striae, the wings browner, 

 tlie head narrower, and the mesothorax rugulose with dense 

 punctures. 



Augochlora amatitlana, sp. u. 



(J . — Length about 10 mm., anterior wings about 7. 



Head and thorax bright blue-green with purple tints, the 

 purple mainly in the form of two suffused longitudinal bands 

 on mesothorax and two spots on scutellum ; middle of face 

 golden green ; metathorax and postscutellum of the same 

 colour, not so blue as scutellum ; a small golden triangle at 

 upper end of metathoracic truncation ; head broad above, 

 eyes deeply emarginate, almost without hair ; clypeus strongly 



