The Sphegoidea of Nebraska 5 
tibiae usually strongly spinous; tarsal comb in female present (except 
Rane SMIAIEIED tee Se seth rot F. cause sik ew ale and Tele oe CHLORIONINAE 
Subfamily SCELIPHRONINAE 
KEY TO THE GENERA 
_ Transverse median nervure in front wings interstitial with the basal 
nervure; species metallic blue or violaceous; clypeus anteriorly 
three-dentate; petiole of abdomen not or scarcely longer than the 
PATE UUL ITP IT caese er sins s ceceeaee here hraisee Pale nes eee sie De eb he Chalybion 
Transverse median nervure in front wings not interstitial with the 
basal nervure, but uniting with the median nervure a little before 
the origin of the basal nervure; species black and yellow, not me- 
tallic; clypeus flat, at apex bidentate; petiole of abdomen about 
PB eres AAS PAS OANCTALHOLAR oo ecie esos <0 2 ciel aia, aievcye ie a\tiee’s Sceliphron 
Genus Chalybion Dahlbom 
. Chalybion coeruleum (Linnaeus). 
= 1758. Sphex coerulea Linnaeus, Systema Naturae, 10th edition, p. 571. 
Found in the greatest abundance over the entire state. 
Genus Sceliphron Klug 
’ cr 
;- Sceliphron coementarium (Drury). 
E- 1770. Sphex coementaria Drury, Illustrations of Natural History, i, 
4 p. 105. ; 
; Taken commonly throughout the eastern half of the state. 
a 
Subfamily SPHECINAE 
KEY TO THE GENERA 
ta) T9.7 
ae, 
Front wings with two cubital cells; petiole long, two-jointed, as in 
a Sphex; submedian cell as long as median................. Coloptera 
: Front wings with three cubital cells; submedian cell a little shorter 
than the median. 
Petiole of the abdomen very long, two-jointed, the second segment 
being elongate and slender, forming with the first a long petiole, Sphex 
Petiole of the abdomen not especially long, one-jointed, the second 
: . segment bell-shaped; clypeus in the female with a more or less 
. Gishmete Mctlal -emarrinatiOn=:.)..2....0c.one cus dene es Psammophila 
327 - 
