168 WESTERN QUARTERLY REPORTER, 



ginated and densely ciliated on the anterior edge, lobes acute ; cly- 

 peus four-toothed at tip ; wings dusky blackish on the posterior 

 margin ; wing scale and double line on the scutel yellow ; tergum 

 yellow; incisures reddish brown. 



Length of the body nine-tenths of an inch. 



The specimen is a female, remarkable by the prominence of the 

 nasal portion of the face, a character which was also pointed out by 

 Latreille, in a species which he called Cerceris aurita, which insect 

 he observed to nourish its young, with insects of the Linnean 

 genus Curculio. 



2. C. BIDENTATA. — Lateral lobes of the clypeus each elevated 

 into a prominent spine : anterior margin of the superior wings 

 dusky. 



Inhabits Arkansa. 



Body pale yellowish ; head behind the eyes and above, and 

 base of the antennae, rufous; antennae black at tip; front concave 

 lateral lobes of the clypeus each with a conic prominence per- 

 pendicular to the surface ; mandibles black at tip ; thorax rufous 

 on the principal segment; superior wings blackish on the anterior 

 margin, the costal nervure tinged with yellowish in the middle : 

 tergum incisures reddish brown ; segments each with a transverse 

 groove on the middle. 



Length less than three-fifths of an inch. 



In general color, very much resembles the preceding species 

 from which it may be distinguished by its much smaller size, [81] 

 and by the two remarkable spines or tubercles situated on the lateral 

 lobes of the clypeus. The specimen is also a female. 



ODYNERUS Latreille. 



0. CRYPTicus. — Rufous; wings dusky; tergum trifasciate with 

 yellow. 



Inhabits Arkansa. 



Body rufous, much punctured ; vertex and origin of the an- 

 tennge, black ; antennae dusky at tip ; thorax with a black spot 

 before the middle ; scutel bilobate with a longitudinal deeply im- 

 pressed line ; metathorax concave ; wings dusky, paler at tip ; 

 tergum with three yellow bands, the anterior one smallest and 

 sub-concealed. 



Length more than two-fifths of an inch. 



