Vol. XXl'x] ENTOMOLOGICAL NEWS 169 



9 Less elongate, broader. Abdomen more strongly convex. 

 Measurements. $ Length, 20.5-23.0 mm.; width, 6.0-6.5 mm. 9- 

 Length, 20.0-24.0 mm.; width, 6.2-7.0 mm. 



Habitat. Nogales, Santa Cruz County, Arizona, August 

 and September, 1906. Eleven specimens studied. Collected 

 by F. W. Nunenmacher. 



Types in my own collection; type locality, Nogales, Arizona. 



Attenuata can be recognized by its smoother sculpturing, 

 more attenuate and fusiform body. 



Some Bees of the Genus Panurginus (Hym.). 



By T. D. A. COCKERELL, Boulder, Colorado. 

 It is a remarkable thing that the northern genus Panurginus 

 has penetrated to Southern South America ; while Pcrdita, so 

 rich in species in our southwest, appears to be wholly absent 

 from the South American desert regions. 



Panurginus callurus sp. n. 



Length nearly 5 mm., with broad abdomen; head and thorax 

 black, abdomen clear orange-ferruginous, without hair-bands ; flagellum 

 short, bright ferruginous beneath, darker above; mandibles bright fer- 

 ruginous, with the apex broadly black; hair of head and thorax whit- 

 ish, scanty, abundant on postscutellum ; facial quadrangle much broader 

 than long ; head and thorax shining and finely punctured, the mesothorax 

 and scutellum polished ; eyes gray ; tegulae light rufo-testaceous ; wings 

 hyaline, nervures and stigma testaceous; b. n. falling far short of t. m. ; 

 base of metathorax with irregular plicae, and the surface microscopi- 

 cally reticulate; legs ferruginous, the anterior femora dusky; scopa of 

 hind tibiae loose, of simple curved hairs, which are microscopically an- 

 nulate; hind basitarsus about as long as the other joints together, and 

 much broader; claws cleft; abdomen with very little hair except at 

 apex. The stigma is smaller than in P. vagabiindus. 



Carcarana, Argentina (L. firnncr 76). United States Na- 

 tional Museum. Easily kno\vn by the red abdomen. P. mft- 

 t'cntris Friese has also a red abdomen, but the head and 

 thorax are dark blue. It is from Mexico. 



Panurginus vagabundus sp. n. 



5. Length about 5 mm., anterior wing 4; black, the hind margins of 

 the abdominal segments rather obscurely ra-.taneous ; pubescence scanty, 

 whitish; eyes slaty black; clypeus pale lemon yellow \\ith two dark 



