184 Cocherell — Nev^ American Bees. 



Triepeolus hopkinsi sp. nov. 



Male. — Length, about 8.5 mm.; black with pale grayish-creamy markings, 

 hair of face white; eyes light greenish-yellow ; mandibles reddish in mid- 

 dle; labrnm dark reddish; antenna:" black, only the third joint red beneath ; 

 stripes on anterior part of mesothorax not joined by pubescence ; tegulee 

 deep coppery-red ; scntellum strongly bilob'ed; lateral teeth black, sharp 

 and rather large; wings a little dusky, nervures piceous ; legs (except 

 coxfe) entirely red, spurs red; hair on inner side of basal joint of hind 

 tarsi light orange; abdomen obconical not at all globose, with six uniform 

 entire bands of tomentum ; black area on first segment a transverse band, 

 on second pointed laterally; both the elevated ventral fringes entirely 

 creamy-white. Close to T. occidentalis Cr., but distinguished by its smaller 

 size, the color of the spurs, the narrow apical plate of the abdomen, and 

 the anterior process of pubescence on sides of second abdominal segment 

 large and directed antero-mesad, in the manner of T. callopus, only it is 

 broader than in that insect. The lower part of the pleura, as in occidentalis, 

 is extremely densely punctured, but it is only partly bare of pubescence. 

 In many respects it resembles T. isocom^ CkW., but it is easily distinguished 

 by the color of the pubescence of the hind tarsi, the seminude lower 

 part of pleura, etc. It also much resembles T. callopus Ckll., and I should 

 think it might be the undescribed male of that insect, were it not for the 

 different color of the spurs, and the much more developed lateral teeth of 

 the scutellum. 



Habitat. — Grand Canyon of the Colorado, Arizona, August 3, 1904. 

 (Webb). Received from Mr. Viereck, to whom it has been returned. 

 It is named after Professor Hopkins, who sent it to Mr. Viereck, and who 

 has (lone good work in the region of the Grand Canyon. 



