114 THE CANADIAN ENTOMOLOGIST. 



femora and tibiae in part, a transverse band on dorsal segments 1-5 of 

 abdomen, all of which except the first are narrowed medially, the first and 

 second slightly separated, that on the third segment somewhat squarely 

 emarginate behind, and ventral segments 2-4 with a large spot, those on 

 the second segment longitudinal, the others transverse ; mandibles and 

 labrum fringed with testaceous hairs ; head, thorax, legs and abdomen 

 beneath with long, pale hair. Length, 18-20 mm. 



So. Illinois (Chas. Robertson). One specimen has the markings oh 

 the abdomen narrower, the band on the second segment widely divided in 

 the middle, the third ventral segment immaculate, and the front with a 

 longitudinal medial yellow line. Allied to sexcincti and caroliniana. 

 From the first mentioned it is distinguished by the entirely smooth meta- 

 thorax, the richer livery ; from the latter by the stronger and closer 

 punctuation of the front and ventral portion of the abdomen and larger 

 size. It may, however, prove to be but a variety of sexcincta. 



POMPILUS RELATIVUS. 



$ . — Anterior margin of clypeus distinctly but not strongly incurved ; 

 ront with the impressed line obliterated in the middle, but very strong 

 behind the antennae and before the ocelli ; posterior margin of 

 prothorax subangular : metathorax rounded behind, upper surface with a 

 rather strong, longitudinal, impressed line, which terminates at base of 

 posterior face, the latter depressed ; tibiae and tarsi strongly spinose ; 

 tarsal claws toothed at the base ; longest spur of hind tibise more than 

 half as long as the first joint of hind tarsi ; wings deep blackish violaceous, 

 the apical margins even darker, third submarginal cell triangular, the 

 second and third cubital transverse veins very contiguous at the top, 

 second recurrent nervure sinuous, received by the third submarginal cell 

 at about the middle ; ventral abdominal segments with a few erect hairs, 

 which are most dense and prominent on apical segment. Black, with a 

 very slight bluish reflection, which is most obvious on the abdomen ; legs 

 and antennae entirely black ; head and anterior coxae with numerous 

 long, black hairs, the prothorax and dorsulum also with a very few 

 hairs. Length, 18 mm. 



Two specimens. Ocean County, N.J. (Prof. J. B. Smith); So. 

 Illinois (Chas. Robertson). Related to philadelphicus, cethiops and 

 maurus. The clypeus is much less incurved than in either of the first 



