158 HYMENOPTERA. 



few scattered sharp spines, tlie anterior tarsi ciliated exteriorly ; 

 the tarsi obscurely rufo-piceous. Abdomen : the apical ventral 

 segment having an elongate-ovate fuscous spot. 



Hab. Mexico (Vera Cruz). 



196. POMPILUS ALGIDUS. ' B.M. 



Female. Length 1 1 lines. — Black : body and legs covered 

 with purple iridescent pile ; the face, clypeus, and mandibles in 

 the middle, obscurely ferruginous ; the scape and three basal 

 joints of the flagellum ferruginous beneath. Thorax : the pos- 

 terior margin of the prothorax fusco-ferruginous ; wings dark 

 fuscous, with a brilliant violet iridescence ; the anterior tibiae and 

 tarsi strongly ciliated exteriorly, the intermediate and posterior 

 pairs thickly spinose. Abdomen : the base of the second and 

 third segments pale ferruginous, the former obscurely so. 



Hab. North America? 



197. POMPILUS BIPARTITUS. B.M. 



Pompilus bipartitus, St. Farg. Hym. iii. 439. 36 $ . 

 Hab. North America ; Philadelphia. 



198. Pompilus biguttatus. B.M. 



Pompilus biguttatus, Fabr. Ent. Syst. Supp. p. 249. 18 ; Syst. 

 Piez. 193. 28. 



Say, Bost. Journ. i. 303. 3. 



Hab. North America ; Nova Scotia. 



199. Pompilus calipterus. 



Pompilus cahpterus. Say, Bost. Journ. i. 302. 1. 

 Hab. North America (Indiana). 



200. Pompilus ephippiger. B.M. 



Female. Length 6-81 lines. — Black : the head thinly 

 sprinkled with black pubescence ; the anterior margin of the 

 clypeus emarginate ; the posterior margin of the prothorax 

 arcuate ; the metathorax rounded, smooth, and having a fine 

 sericeous pile of a purple tint ; wings dark fuscous, their apical 

 margins havmg a darker border ; the tibiae and tarsi spinose. 

 Abdomen : the second and third segments have a broad yellow 

 fascia, the posterior margin of which is emarginate. 



Hab. North America. 



