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



tegulae rather large, piceous, finely punctured all over; hind 

 spurs \Aith numerous oblique fine teeth, rather too long to 

 call the spur serrate. Head broader than long ; cl ypeus 

 short ; face and front quite hairy ; cheeks unarmed ; an- 

 tennae entirely black ; mesothorax and scutellum moderately 

 shining, very finely and quite closeh^ punctured ; scutellum 

 depressed in middle ; area of metathorax a broad band, 

 angulate in middle, its whole surface dull black, rugulose, 

 with strong irregular ridges ; apical truncation of metathorax 

 heart-shaped, sharply margined. Legs black. Abdomen 

 shining, with very minute piliferous punctures, the whole 

 surface finely pilose, the pile shining pale greyish in certain 

 lights ; lateral bases of second and third segments, and fourth 

 slightly, with pale triangular hair-patches ; discs of apical 

 segments laterally with fuscous hair, 



Hab. Quirigua, Guatemala, 2 ? [W. P. Cockerell). 



The type carries much pale yellow pollen, of large grains, 

 ou the hind legs. Superficially very like H. pseudopectoralis, 

 Ckll., from Mexico, but easily separated by the dull opaque 

 area of metathorax. There is no close resemblance to any 

 of the Mexican species described by Vachal and Smith. In 

 Crawford's table of North- American species (1907) it runs 

 to H. glabriventris, Crawf., from Oregon, but differs by the 

 structure of the metathorax. 



The species is dedicated to Dr. E. L. Hewett, under whose 

 directions the ancient ruins at Quirigua were being excavated 

 at the time wheu the bees were caught. 



Halictus townsendi, Cockerell. 



The male, hitherto unknown, was taken by Mrs. Cockerell 

 at Antigua, Guatemala. 



It is like the male of H. armaticeps, but rather large (ante- 

 rior wing 7 mm.), with the middle and hind tibise black 

 except at base and apex. Owing to the colour of the tibiae, 

 this runs in my table in Proc. Philad. Acad. 1898, p. i>l, to 

 H. pacijicus, but the structure of the metathorax is as in 

 armaticeps. 



Halictus adustipennis, sp. n. 



^ . — Length a little over 8 mm., anterior wing 7. 



Black, including the antennse and legs, except that the 

 tarsi are obscure reddish ; tegulse shining black, well 

 punctured all over, but so minutely that a compound 

 microscope is needed to bring out the character well ; Avings . 

 orange-tinted, becoming a strong orange-fuscous in the 



