AMERICAN HYMENOPTERA. 75 



Nomada Snowii. — ^9. — Black, opaque, densely and strong!}' punctured; 

 middle of face, clypeus, antennae at base and beneath, pleura beneath, two dots 

 on metathorax and flanks, legs and first abdominal segment above and beneath, 

 ferruginous; mark on each side of face, apex of labrum obscurely, spot at base 

 of mandibles, posterior orbits, collar, tubercles, tegulse, scutellums and large 

 mark, notched behind, on pleura, white; second joint of flagelluni equal in 

 length with the third; scutellum nearly flat, very faintly impressed medially; 

 wings slightly dusky, hyaline near tips; line on four anterior femora beneath, 

 near tips, line on all the tibise at base and spot at tips, white; abdomen opaque 

 finely and closely punctured, a dot on each side of first segment riear apex, a 

 broad band narrowed medially on segments 2 — 4, and the fifth segment entirely 

 pale yellowish-white; venter banded with white. Length .34 inch. 



%. — Marked like the ?, but without any ferruginous color, except on an- 

 tennae beneath and on legs; sides of face, clypeus, labrum, mandibles except 

 tips, spot on scape beneath, collar, scutellums, tubercles, large notched mark 

 immediately beneath tubercles and tegulse, yellowish-white; face silvery; legs 

 ferruginous, the femora more or less black behind, knees and tibiae in front 

 yellow, a black spot on four posterior tibiae near tips; first segment of abdomen 

 with a narrow yellow band, deeply indented on each side anteriorly and nearly 

 interrupted on the disk, segments 2 — 6 each with a yellow band, broad on 

 second segment and narrowed in the middle; venter banded with yellow. 

 Length .36 inch. 



Hub. — Colorado, (Prof. F. H. Suow 9 ; Morrison % ). Two speci- 

 mens. A very pretty species. 



IVomada Ileiligbrodtii. — 9 . — ^Black, opaque, coarsely and confluently 

 punctured; mouth tinged with ferruginous; large cuneiform spot on each side 

 of face, spot on base of mandibles, spot on upper posterior orbits, collar, two 

 spots on scutellum, postscutellum, tubercles, sublunate spot on pleura and 

 tegulse, white; antennse with three basal joints ferruginous, third joint longer 

 than fourth; metathorax immaculate, im])unctured, clothed laterally with pale 

 pubescence; wings fuliginous along costa and at tip; legs entirely ferruginous; 

 abdomen finely and closely punctured, rather shining, a continuous yellowish- 

 white band on segments 1 — 5, that on second segment dilated laterally, and that 

 on the fifth subinterrupted medially; venter black, with a narrow curved pale 

 line on each side of third and fourth segments. Length .35 inch. 



%. — Smaller and more slender than 9> ^^^ more shining, with the pale 

 markings lemon-yellow; the entire face beneath antennse is yellow; antennae 

 entirely ferruginous except at tip above; the yellow spot on pleura reduced 

 to a dot- wings darker; the yellow bands on abdomen are broader and inter- 

 rupted medially on segments 2 — 4, while on basal segment there is only a small 

 lunate spot or line on each side near apex, sixth segment with a yellow spot on 

 each side; venter black immaculate. Length .29 inch. 



Hah. — Texas, (Mr. L. Keiligbrodt). Three specimens. This is 

 closely allied to modcsta Cress., which always has a yellow spot on 

 each side of metathorax. 



Nomada Krngii. — 9- — Black; head and thorax densely and rather 

 finely punctured; face, sides of thorax and of metathorax clothed with a fine 

 silvery- white sericeous pile; sides of face, spot at base of mandibles, posterior 



