Studies of North American Bees 9 



(^. Length 6.5 mm. Black. Head and thorax subopaque, very densely 

 and strongly punctured. Hair of head and thorax grayish white with a few 

 black hairs intermixed on vertex and mesoscutellum. Legs densely punc- 

 tured, very thinly clothed with pale pubescence and with sparse black bris- 

 tles scattered on last four tibiae, the tarsi within with reddish golden hair. 

 Bowl of enclosure on propodeum opaque, finely roughened, the neck shin- 

 ing. Venation as in $. Abdomen somewhat shiny, the tergites closely 

 punctured except on the cream-colored bands, especially basally, bands on 

 tergites 1-5, all complete, those on 1-4 very feebly broadly subemarginate 

 laterally on posterior margin, those on 3-5 feebly incised medially on 

 posterior margin nearly cutting through on 5. Tergite 5 coarsely punc- 

 tured, its apical border broadly raised laterally. Pygidium crescentic in 

 outline and with a slight marginal notch medially. Venter indistinctly 

 roughened, sternite 5 with a dense fringe of ochreous hair, sternite 4 with 

 a similar but paler and much thinner fringe. 



Allotype. — Ute creek, Costilla county, Colorado, July 17, 1907 

 (R. W. Dawson). 



Subfamily Anthidhnae 



KEY TO THE NEBRASKA GENERA 



Pulvilli absent; second recurrent nervure received opposite second trans- 

 verse cubital nervure, or rarely a little beyond it; pygidium of male 

 usually terminally spined Anthidhim 



Pulvilli present; second recurrent nervure received well beyond second 

 transverse cubital nervure, or sometimes opposite it in a few species ; 

 pygidium of male usually truncated or lobed Dianthidium 



Genus Anthidium Fabricius, 1804 



KEY TO THE NEBRASKA SPECIES 



Females 



Cheeks wholly yellow and this color connected by a broad uninterrupted 

 yellow line across the vertex; broad lateral face marks extending nearly 

 to vertex, clypeus except a broad central band, mandibles except tips, 

 four scarcely interrupted spots on mesoscutellum, lines on lateral and 

 antero-lateral margins of thorax, tubercles and broad area beneath, spot 

 on tegulae, legs except coxae and inner surface of femora and tibiae, 

 broad medially interrupted bands on abdominal tergites 1-5 and all of 

 tergite 6 except two depressed black spots, deep yellow; all pubescence 

 whitish ; 14 mm serranum 



Cheeks black, or with a yellow band not connected by a band across the 

 vertex ; ornamentation not as above i 



