1903.] NATURAL SCIENCES OF PHILADELPHIA. 587 



Bruncr." The last, I suppose from the San Luis Valley, is pecuhar 

 for having the nervure separating the first and second submarginal 

 cells wholly wanting in both wings. 



The var. flagellaris has the basal joints of the flagellum lengthened, 

 as indicated in the table. It is possibly a distinct species. It is from 

 Colorado (Morrison), in U. S. National Museum. It has the "anterior 

 middle of mesothorax" red like the rest, not black. The yellow of the 

 metathorax extends upward to form two large spots on the enclosure. 

 The legs are without black, even on the coxae, 



MELANOMADA, subg. n. 



Type N. grindelm, Ckll. The male, in Robertson's table, runs to 

 Holonomada, but is entirely black, without yellow markings. Size 

 small; vertex and mesothorax smooth and shining; apex of abdomen 

 rounded, entire; basal nervure meeting transverso-cubital ; antennae 

 short, third joint much longer than fourth, middle joints of flagellum 

 much wider than long. Female unknown.^ The type was taken at 

 Lincoln, Neb., at flowers of Grindelia, in September. It is described in 

 a paper sent to Am. Mag. Nat. Hist. A second specimen (Coll. of 

 Acad. Nat. Sci. Phila.) is from Montana (no other particulars 

 known); it is smaller (length about 6 mm.), with red mandibles and 

 reddish stigma. 



By the smooth mesothorax, Melanomada recalls the Mexican A^. 

 limata, Cresson, 



Nomada magnifica, sp. n. 



9. —Length about 13^ mm., robust. "Colo., 1170, A. E, S. Coll., 

 W. J. Fox," with Mr. Viereck's note, "mixed with grandis." I confess 

 that I should have taken it for grandis, had not Mr. Viereck found it 

 different. In true A'', grandis, as I learn from Mr. Viereck, the basal 

 nervure is a long distance basad of the transverso-medial, as in superha, 

 edwardsii and affabilis; in A'^. 7nagnifica the basal nervure meets the 

 transverso-medial. The specimen of magnifica has the yellow parts 

 wholly reddened by cyanide, but it seems to have been marked as in 

 grandis; the abdomen was certainly yellow with the hind margins 

 of the segments infuscated, and with the basal half of the first segment 

 ferruginous, with a dusky spot on each side. Other particulars are: 

 Apical part of mandibles black; mandibles simple, stout; head prac- 

 tically wdthout black, area about ocelli blackish; antennae entirel}' red, 

 third joint longer than fourth; mesothorax coarsely and extremely 



' Mr. J. C. Crawford writes that he has the 2 , and that it has a red abdomen. 



