1903.] NATURAL SCIENCES OF PHILADELPHIA. 



571 



Nomada erythraea, Dalla Torre. 



o ._ciosely allied to N. ultima, Ckll.; mandibles and anterior coxse 

 simple; stigma orange-brown; mesothorax and metathorax red with- 

 out^markings ; second, third and fourth abdominal segments with suc- 

 cessively smaller pallid lateral spots, easily overlooked; basal joint of 

 hind tarsi with dark hair on inner side. The basal nervure ends just 

 basad of the trans verso-medial. 



Hab.—Sain Bernardino county, Cal., May. One in U. S. Nat. 

 Museum. 

 Nomada rhodosoma, sp. n. 



Q .—Length 7 mm. Almost exactly like N. enjthrcea, but a little 

 smaller, and the third antennal joint almost or quite as long as the 

 fourth (in erythrcea it is not over half as long). There is black between 

 the ocelH, and a black stain in the middle of the metathoracic enclosure. 

 Basal nervure ending scarcely basad of trans verso-medial. Stigma 

 ferruginous. Hind tibiae strongly tuberculate on the outer edge, which 

 is not the case in erythrcea. 



Ha6.— Santa Cruz Mts., Cal., two in U. S. Nat. Museum. Six males 

 (four from Santa Cruz Mts., two from "Gala.") are provisionally 

 assigned here; they may not all belong to one species. 



Nomada californiae, sp. n. 



9 .—Length about 7^ mm. ; also similar to erythrcea, but easily dis- 

 tinguished by the characters given in the table. The head is very 

 broad, and the upper parts of the head and thorax are conspicuously 

 clothed with dark hairs, while the hair on the sides and under parts is 

 white. Ocelli on a black patch; mesothorax with a blackish band; 

 metathorax with a blackish band, becoming faint anteriorly; post- 

 scutellum with a decided yellow tint; abdomen without black; an- 

 tennae entirely red; third joint almost as long as fourth; wings rather 

 dusky, not very dark at apex; stigma orange-ferruginous; basal nerv- 

 ure ending a short distance basad of transverso-medial ; legs red with 

 no black marks except on coxae; the hind femora have a very faint 

 blackish stripe behind. 



Hab—"So. Cal.," one in Coll. Acad. Nat. Sci. Phila. Among the 

 Oregon species this is related to N. astori, Ckll., and N. corvallisensis, 

 Ckll. From astori it is easily distinguished l)y the much shorter fourth 

 antennal joint and the absence of black marks at sides of first 

 abdominal segment. From corvallisensis it is known by its hghter, 

 brighter color, the much smaller punctures of mesothorax, and the 

 hind femora not black behind. 



