Studies of North American Bees 97 



abdomen paler without dark bands on tergites 1-4 or sternite i 

 or yellow spots on tergite 2, etc. The unspotted abdomen is 

 diagnostic from the other species of this subgenus. 



SPECIES FROM OUTSIDE NEBRASKA 



Nomada (Gnathias) utensis n. sp. 



$. Length 5.5-7 mm. Head and thorax black, coarsely and very closely 

 punctured, the anterior edge of the clypeus, malar space, mandibles, 

 labrum, whole of antennae, spot at top of eye, tubercles, tegulae, meso- 

 scutellum, and legs except for small black spots on both faces of middle 

 femora and trochanters, anterior face of hind femora and most of all of 

 the coxae, bright red. Sometimes there is a small more or less obvious 

 reddish stain spot on the anterior part of the mesopleura. Antennae red, 

 joint 3 a little shorter than 4. Wings hyaline, clouded apically and about 

 marginal and submarginal cells, the nervures and stigma red except the 

 blackish costal nervures, the basal nervure a little basad of transverso- 

 medial nervure. Abdomen bright light red, tergite i with about the basal 

 one-third black, the black area ending in an irregular line, the apical 

 margins of tergites 1-4 stained with darker red than the rest of the ter- 

 gum, sternite i with a large black V-shaped mark. Head and thorax 

 with thin, rather long, pure white hair, especially evident on occiput, 

 cheeks, pectus, and sides of propodeum, the apex of abdomen with a 

 dense tuft of curved black bristles on each side ventrally. 



c?. Length 6 mm. Head and thorax wholly black, coarsely and closely 

 punctured. Mandibles yellowish red with the tip bright carmine and deeply 

 toothed. Orbits converging below rather strongly. Supraclypeus and 

 upper clypeus, together with adjacent areas on the sides of the face, 

 densely covered with appressed silvery hair, the cheeks and occiput with 

 very thin but long and erect pale hair. Scape black, punctured, sparsely 

 fringed with long erect pale hair, flagellum dark red beneath, above with 

 a black line covering most of the surface of the joints, joint 3 nearly 

 three fourths as long as 4. Legs yellowish red, very strongly yellowish 

 on anterior femora and first four tibiae, the coxae and trochanters, a 

 broad line on anterior femora beneath, whole of middle femora except a 

 broad stripe on anterior faces above and the tips, whole of posterior 

 femora except the tips, and elongate spots on the first four tibiae behind, 

 black. Outer face of posterior tibiae tuberculate, posterior basitarsi with 

 golden hair within. Tegulae black, edged with testaceous. Wings clear, 

 scarcely darkened apically, nervures and stigma red, basal nervure a little 

 basad of transverso-medial nervure, the second submarginal cell narrow 

 and receiving the first recurrent nervure at its middle. Abdomen red. 

 tergite i with the basal half black and a black oval spot on each side of 

 the reddish submedian band, the apical margins of tergites 1-4 broadly 



97 



