The Sphegoidea of Nebraska 85 
4. Body not unusually pubescent; postscutellar spine rapidly 
narrowed to an acute point, which is black; apical seg- 
ments of abdomen not ferruginous............... albosignatus 
5. Abdomen of male with strongly developed lateral spines; pub- 
escence very sparse; postscutellar spine sharp pointed; 
SIZCMAO OMT, on cro kiet cL urdehia ec aiove shathoblae te dura a aiSleeaee subulatus 
5. Abdomen of male without strongly developed lateral spines; post- 
scutellar spinerounded’ of trumicate..ci). ie. Se. Dba: 6 
6. Postscutellar spine slightly narrowed apically; squamae sep- 
arated by about the distance across the base of one; upper 
portion of posterior face of metathorax coarsely reticulate, 
balloon-shaped area impunctate; apical segment of abdo- 
TERE SIMA E APE rei oc sturera di cite e ccteia es ha eared Oe wo eltais Manatee he 7 
6. Postscutellar spine somewhat widened at apex; squamae 
practically touching; posterior face of metathorax closely 
punctured, including the balloon-shaped area; faint indi- 
cations of lateral abdominal spines; apical segment of ab- 
ASME GU TOMS aerate eis sates cele otvaret one titer e hints apicatus 
7. Smaller specimens; abdominal bands narrow and widely separated; 
Will Owen VUNES AOAGKET Me torch iow a, sees wipers oes quadrinotatus 
7. Larger, more pubescent; abdominal bands broader and more ap- 
proximate, forming continual bands on segments 4 and 5; 
wing nervures more yellowish................. var. montanus 
Oxybelus cornutus Robertson. 
1889. Oxybelus cornutus Robertson, Transactions of the American 
Entomological Society, xvi, p. 80. 
I have nine specimens of the typical form of this species and 
six specimens of what Professor Cockerell calls quadricolor, but 
which is only a form of cornutus. I have all intergradations be- 
tween the two forms. Glen, August 12 to 19; Broken Bow, Au- 
gust 28, 1906. 
Oxybelus subulatus Robertson. 
1889. Oxybelus subulatus Robertson, Transactions of the American 
Entomological Society, xvi, p. 79. 
Two specimens from Jim creek in Sioux county, and from 
West Point, during June and July. 
Oxybelus albosignatus, n. sp 
. Length 9.5 mm. Insect black, ornaments whitish, with only a faint 
tinge of yellow; face clothed with rather dense silvery pubescence, that on 
the occiput more golden; occiput, vertex, and face with medium-sized 
rather close punctures, those on the clypeus and lower portion of face 
ieee oy: 
