72 ^Ir. '\\ 1). A. Cockercll — Description!^ and 



biack above, except a couple of black spots on each extreme 

 side oF first sef^nicnt ; beneath, the first segment has a lar^e 

 black fish-tail mark, the prongs long, and the hind margins 

 of the first two segments are suffused with dusky. 



J/ab. N. Yakima, Washington State, May 15, 19.)'} 

 {Eldred Jenne). 



From Mr. Melander, with his no. 18, In the table of 

 Rrjcky Mountain species this runs to 70, but is quite distinct 

 from N. Sai/i. In Robertson's table it runs to 4 (.V. Cres- 

 sonii and Sai/i), but is not identical with tlie species there 

 indicated. The insect remintls one strongly of some of the 

 species of Gnuthias. 



Also at N, Yakima, but on June 5, ?>rr. Jenne took 

 Nomada erijthrochroa, Ckll., of which only one specimen 

 (from Pasco) was previously known. 



Centris Morsei marij'inata ( Fox). 



The Centris marginata of Fox is evidently only a variety 

 of Morsei, as Mr. Fox suspected. The original type, which 

 is before me, shows that the abdomen is not bare, as Fo.x 

 states, but is pruinose-pubescent exactly as in Morsei. The 

 lack of pubescence on the middle of the thorax is due to 

 abrasion. Tiie fourth antennal joint is red beneath. A 

 second specimen of this form has been taken by Dr. F. H. 

 Snow at the San Bernardino Ranch, Douglas, Ariz )ua, 

 3750 feet, August. 



Centris atripes, Mocsary. 



Renewed study convinces me that C. Foxi, Friese, must 

 fall as a synonym of C. atripes. The species is to be added 

 to the fauna of Arizona, as Dr. F. H. Snow took two males 

 at the San Hernardino Ranch in August. At the same 

 locality Dr. Snow took Protoxcea gloriosa (Fox), also new to 

 Aiizona. 



Oaaa tristis, Gr.bodo. 



San Bernardino Ranch, Arizona, Aug. {F. II. Sjiow). 

 !Ncw to the United States. 



Xcnor/lossodes eriocarpi (Ckll.). 



Brownsville, Texas, June {F. H. Snow). This record 

 extends the known range ab^ut four degrees south. 



