104 k E. T. CRESSON. 



E. Bodi/ fuscous, marked and handed with yell oxoish. 



45. Pompilus interruptus. 



Ccropa/es intcrruplus, Say, Bost. Jour. Nat. Hist, i, p. 365, % . 



Female. — Blackish-fuscous; orbits before and behind narrowly yel- 

 low ; clypeus either entirely fuscous, or entirely yellowish-ferruginous, 

 or of the latter color, with a large, central, square, blackish mark, an- 

 terior margin truncate ; the mandibles vary from fuscous to entirely 

 pale ferruginous; palpi yellowish; antennns convolute, as long as the 

 head and thorax together, orange-yellow or ferruginous, the apical half 

 fuscous or black ; posterior margin of prothorax angular, more or less 

 distinctly margined with yellowish ; a spot on each side of the scutel- 

 luni, sometimes wanting, a transverse spot on the post-seutellum, and 

 a transverse spot on each side of metathorax at tip. bright-yellow ; 

 metathorax rounded, convex, without any impressed line ; tegula) fer- 

 ruginous ; wings fuscous, varied with yellowish-fuscous ; marginal cell 

 long, narrow, sublanceolate ; third submarginal large, subtriangulav, 

 much narrowed towards the marginal; legs blackish-fuscous, tips of 

 the femora pale ferruginous ; tibiae ferruginous, yellow at base above, 

 and dusky at tips; tarsi yellowish, annulated with dusky, anterior pair 

 ciliated, but not strongly so ; four posterior tibiae rather thickly spi- 

 nose; abdomen somewhat shining, somewhat sericeous, subdepressed, 

 brown-ferruginous at tip and beneath ; second segment with a small 

 triangular spot on each side at base, and a narrow, sub-basal band on 

 the third segment, yellowish ; this latter is sometimes reduced to a la- 

 teral spot, similar to that on the second segment; in one specimen the 

 abdomen is brown-ferruginous, with the sutures blackish and without 

 any yellow spots, while another specimen has the abdomen blackish- 

 fuscous, and immaculate. Length G — To lines. 



Male. — Smaller than the $ , with thickened, crenulate antcnnre and 

 subdepressed abdomen ; the antennie are entirely ferruginous, darker 

 above, the basal joint beneath sometimes yellow; the orbits broader in 

 front and interrupted above, the clypeus, except a large, black, cen- 

 tral, quadrate spot, the tips of the mandibles and the palpi, are yellow; 

 in one specimen the clypeus, except its anterior margin, is entirely 

 black, and the mandibles are blackish, dull yellow in the middle; the 

 thorax is marked like unto that of the female, with the addition of a 

 rather large, cuneiform, yellow mark on each side of the pleura, which 

 mark, however, is sometimes wanting; the spot on each side of the scu- 

 tellum is present in all the specimens but one ; the wings are paler 

 than those of the 5 ; the abdomen is slightly iridescent, the third and 

 fourth segments have a narrow yellow band at base, subobsoleto on the 



