DESCRIPTIONS OF SOME BEES IN THE U. S. NATIONAL 



MUSEUM. 



By T. D. A. COCKERELL, 



Of the Thiircrsiifii of Colorado, Boulder. 



The late Doctor Ashmead described many genera of bees, some 

 of which were based on species hitherto unknown. The descriptions 

 were mostly in the form of tables, and in several cases the new 

 species were merely mentioned by name, the detailed descriptions 

 being reserved for a later occasion. Owing to the pressure of other 

 work and Doctor Ashmead's illness, the opportunity for preparing 

 the projected descriptions never came, and in consequence the species 

 concerned remained very imperfectly known. Through the kindness 

 of the National Museum authorities, I have been allowed to borrow 

 the principal species referred to, and accordingly offer detailed de- 

 scriptions of them. In the cases of the species of J/icrandrena, Croci- 

 saspidia, Perditomorpha, and Ccenonomada, although Ashmead gave 

 no separate specific descriptions, he published enough information 

 in the course of tlie generic diagnoses to satisfy the technical require- 

 ments, and the specific names must be credited to him and dated 

 from 1899. 



I have added some notes on the Philippine Island bees described 

 by Doctor Ashmead, which I examined a few years ago when in 

 Washington. 



Genus CCENONOMADA Ashmead. 



C^NONOMADA BRUNERI Ashmead. 



Ccenonomada hrnneri Ashmead, Trans. Auier. Ent. Soc. XXVI. 1899, p. OS 



(no locality given). 

 Tetrapedia gauUei Vachal, lievne d'Entoniologie, Jamiary, 1904, p. 22. 



(Tueuman, Argentine.) 



Male. — Length about 10 mm. ; black and lemon yellow ; hair of head 

 and thorax above very pale fulvous, of cheeks, pleura, etc., white; 

 wings dusky, the nervures and stigma ferruginous. Head broad; 

 eyes large and prominent, pale green, converging below ; facial quad- 



Proceedinqs U. S. National Museum. Vol. XXXVI— No. 1674. 



411 



