A'ol. XXX] ENTOMOLOGICAI. NEWS 289 



Halictiis peralpinus n. sp. 



$.' Length about 6.5 mm., anterior wing 5.4 mm.; black, including 

 legs, but the flagellum with a light fulvous streak beneath, not reach- 

 ing base or apex ; hair of head and thorax scanty, sordid white ; head 

 longer than broad ; mandibles reddened at apex ; lower part of clypeus 

 shining, upper part dull ; supraclypeal area shining ; front dull, the 

 whole surface minutely sculptured between the punctures; mesothorax 

 dull, with very fine punctures, and the surface lineolately sculptured 

 between ; area of metathorax very finely and delicately wrinkled ; 

 tegulae piceous ; wings dusky hyaline, stigma reddish brown; hind 

 spur pectinate with few spines : abdomen shining, not banded, hind 

 margins of segments brownish. 



Longs Peak trail. Colorado, above timber line, July 20, 1919 

 (JVibnatte P. Cockerel!). 



Differs: (a) from diveigens Lovell by the larger, broader 

 head, dull mesothorax, and absence of distinct white hair- 

 patches on abdomen; {h) from dasiphorae Ckll. by the dull 

 mesothorax, without punctures distinctly visible under a lens, 

 and the pale streak on flagellum; (c) from incondifus Ckll. 

 by the dull mesothorax. 



Halictus supranitens n. sp. 



9. Length about 6 mm., anterior wing about 5.3 mm.; black, in- 

 cluding legs and antennae, apical half of mandibles reddened; hair of 

 head and thorax scanty, sordid white ; head rather elongated, with 

 prominent clypeus, which is shining, with large sparse punctures ; 

 supraclypeal area and sides and lower part of front shining, the front 

 extremely densely and finely punctured ; mesothorax and scutellum 

 polished, with fine rather sparse punctures; area of metathorax very 

 finely wrinkled, its posterior margin prominent, obtuse, shining; pos- 

 terior truncation shining, concave in lateral view ; tegulae black with 

 a brown spot ; wings hyaline, stigma and nervures reddish brown ; 

 second submarginal cell broad ; legs with white hair, a red brush at 

 end of hind basitarsus ; hind spur with three large spines ; abdomen 

 shining, pruinose with dull white pubescence, but without distinct 

 bands or hair-patches. 



Longs Peak trail, Colorado, above timber line, July 20, 1919 

 (Cockcrcll). Differs: (a) from inconditus Ckll. by the clear 

 wings, more shining thoracic dorsum, and shining posterior 

 rim of metathoracic enclosure; {h) from dasiphorae Ckll. by 

 similar characters; (c) from divergens Lovell by the dark 

 tegulae, clear wings, etc. 



