Cresson.] 370 (March 24, 



metathorax broadly and deeply excavated beliind, making the lateral 

 angles prominent; wings hyaline, apical third fuliginous, and a band 

 of same color across the middle, dilated posteriorly; marginal cell 

 long, lanceolate, acutely pointed at tip, second submarginal cell quad- 

 rate, the third rather wider beneath, much narrowed above; legs 

 black, silvery- sericeous, especially dense on tibise and tarsi; abdomen 

 short, oblong-ovate, convex, first two segments shining black, their 

 sides and the base of ^the first, silvery-sericeous in certain lights; 

 remaining segments silvery-sericeous. Length thi'ee and one half 

 lines. 



Hob. — Orizaba. (Prof. F. Sumichrast. Coll. Am. Ent. Soe.) 

 One (5 specimen. This is more closely allied to unicus in general 

 shape than the preceding species, but the second abdominal segment 

 is not so much dilated; it differs, however, by the metathorax being 

 excavated behind, by the longer and more pointed marginal cell, and 

 by the ornamentation, the silvery-cinereous pile being distinct only 

 on fa(5e, tip of metathorax, legs and tip of abdomen. 



10. Pompilus coruscus. 



Pompilus C07-USCUS Smith, Brit. Mus. Cat. Hym., iii, 156. Cresson, 

 Proc. Ent. Soc, iv, p. 128; Trans. Am. Ent. 

 Soc, i, p. 103. 

 Pompilus juxta Cresson (var.), Proc. Ent. Soc. PhiL, Iv, p. 128; 



Trans. Am. Ent. Soc, i, p. 103. 

 Pompilus insignis Cresson (var.), Trans. Am. Ent. Soc, i, p. 103. 

 Hah. — Orizaba. (Prof. F. Sumichrast.) One ? specimen belong- 

 ing to the variety juxta. 



11. Pompilus flavopictus. 



Pompilus Jlavopictus Smith, Journal of Entomology, i, p. 396. 

 Cresson, Trans. Am. Ent. Soc, p. 97. 



Hob. — Orizaba. (Prof. F. Sumichrast.) Eight ? , one 3 , speci- 

 mens. The 3 is smaller and more slender than ? , but resembles the 

 latter very much in color and markings, except that the face is en- 

 tirely-yellow, and the antennae are porrect and ferruginous; the 

 abdomen is subdepressed. This species varies in length from five to 

 seven lines. 



12. Pompilus interruptus. 



Pompilus inlei^uptus Say, Bost. Jour. Nat. Hist., i, p. 365. Cresson, 



Trans. Am. Ent. Soc, i, p. 104. 

 Hah. — Orizaba. (Prof. F. Sumichrast.) One S specimen. 



