j^36 On Insects from Xew Mexico. 



Euura sali'cis-nodus, Walsh. 



Hah. Vicinity of Las Vegas, N. M., fly emerging April 4 

 (Mary Cooper). t i • i 



I have only a single fly, and that is headless ; but I think 

 the identity is reasonably certain, as the galls agree, and the 

 willow is, I believe, the same species as that from which 

 Walsh obtained his species. The colour of the galls is red. 

 From these galls were also bred two females of a Prosopis 

 which is probably a variety of P. mesillce, but may prove 

 distinct when the male is obtained. It lacks the clypeal 

 mark of mesillce, and yet has the form of that insect rather 

 than of P. pygmcea. 



Apidae. 



Osmia fulgicla, Cresson. 



Hab. Beulah, July 16, 1900 (T. D. A. & W. P. CkU.). 

 New to New Mexico. 



Osmia armaticeps, Cresson, var. sapellonis, var. n. 



$ . — Length 12 millim. 



Agrees with the description of armaiiceps, except that the 

 cheeks, instead of being " sparsely and finely punctured," are 

 very strongly and quite closely punctured ; and the raeso- 

 thorax, instead of being " sparsely punctured and polished," 

 is very strongly and densely punctured, the punctures being 

 as close as it is possible for them to be. Probably a 

 distinct species. 



Hab. Hill above Beulah, Aug. 19 [Gkll). 



It has a superficial resemblance to Monumetha argentifrons. 



Co^lioxys Sayi, Robertson. . 



Hab. Las Vegas, at flowers of white hollyhock, July 10, 

 1900, 1 ? (CM.). 



New to the local fauna. 



Monumetha aryenti/ronSj Cresson. 



This species is usually called M. horealis^ but the name 

 argentifrons has priority of place. The female varies con- 

 siderably in size. 



Hab. West Fork, Gila Eiver, July 12, ? (Toicnsend) ; 

 Beulah, Aug. 16, &c. {W. Porter). 1 have also both sexes 

 from Olympia, Washington State, collected by Mr. Trevor 

 Kincaid ; one of the males was collected July 3, on flowers of 

 Epilobium spicatum. 



