600 PROCEEDINGS OF THE ACADEMY OF [Aug., 



nerviire a fair distance basad of transverso-medial ; abdomen rather 

 light red, nearly basal half of first segment black ; large yellow marks on 

 second and third segments elongated and pointed mesad; apical seg- 

 ments suffused with blackish; apex deeplj^ emarginate; venter red, 

 black at base, and with suffused blackish markings. 



9 . — Length about 8 mm.; red; mesothorax with one black stripe; 

 first abdominal segment with a pair of lateral black stripes diverging 

 from the middle of the base, each deeply notched anteriorly; second 

 submarginal cell very broad above. General characters much as 9 

 cuneata (see table). 



Hah. — Veta Pass, Colo., June 28, "collection C. V. Riley"; in Na- 

 tional Museum. This, the type specimen, is a male. Two females in 

 the National Museum are assigned here on the basis of probabilities ; 

 they are from the Baker collection, marked Colorado, number 1,871. 



Nomada schwarzi contractula, subsp. n. 



cJ^. — Length 8 mm.; distinguished principally by the characters 

 given in the table. The greater part of the mesothorax is red, and the 

 pleura has a large transverse red patch. The abdomen is broad, dark 

 red and distinctly punctured. Stigma dark; third submarginal cell 

 with the outer bend low down; apical plate of abdomen only very 

 feebly notched. 



Hab.—Beiilah, N. M., July, 1902. 1 c?. {Cockcrell.) Perhaps a 

 distinct species. 



Nomada perplexa, Cresson . 



Mr. Viereck has examined Cresson's types, and finds they represent a 

 Gnathias 8 mm. long; the scape in front dark ferruginous to dark brown 

 and blackish, pale ferruginous or yellowish-ferruginous at base; no 

 yellow spots on fifth abdominal segment; basal nervure a considerable 

 distance basad of transverso-medial; third antenna! joint little or dis- 

 tinctly less than fourth. The species is a rather obscure but perfectly 

 valid one. I have before me numerous specimens collected by Mr. 

 Mereck, marked Lehigh Gap, Pa., males June 25 to 29, females July 1 

 to 21 (some of the latter collected by Mr. Rehn) ; Montgomery county, 

 Pa., June 21, ? ; Castle Rock, Pa., July 18, 1901, ? . 



Nomada rhodalis, sp. n. 



?. — Length about 8^ mm.; robust, abdomen broad-oval, shining; 

 whole insect bright ferruginous, except a few black markings, viz., a 

 stripe on prothorax, mark betw^een wings and scutellum, and a spot in 

 front of and above middle coxae ; no black at base of abdomen ; palpi 

 darkened, with conspicuous light rings at the sutures; face broad; 



