98 HTMBNOPTBRA OF AMERICA. [PART I. 



resembles a sphere terminated by a little bell-mouthed neck, 

 which it obliterates after filling. One often finds these nests in 

 the country, joined to the upper surface of leaves, or stuck to 

 little branches, or fastened against a wall. The insect places its 

 eggs in it with a provision of caterpillars which can serve for the 

 nourishment of the young larvae According to Say (Long's 

 Sec. Exp., II, 346), it chooses the larva? of nocturnal lepidoptera, 

 but the Eumenes are not particular in their choice. Harris also 

 saw the same species collect larvae (canker worms). 1 The larva 

 occupies about a month in its development, and the perfect insect 

 makes its exit by piercing the walls of the cradle which is then 

 no more to it than a prison. 



6. Wings transparent or yellowish. (Body generally clothed with short woolly 



pile.) 



* Second abdominal segment without lateral yellow spots. 



38. E. ferrilgineus Cress. — %. Pallida ferruginens ; orbitis. clypeo, 

 margiue antico pronoti, maculis 2 rnesonoti, scutello, post-scutello, 

 macula subalari, maculis 2 metanoti, pedibus partim, abdominis seg- 

 meutorum 1, 2 margine apicali, obscure flavescentibus ; antennis mediis 

 nigrescentibus ; alis pallide hyalino-flavidis ; clypeo bidentato, % ar- 

 genteo. Long. 4^ lin. 



E. ferruyinea Cress. Proc. Ent. Soc, Phila., 1865, 158. 9 • 

 Hab. Cuba, 



39. E. Iturbide Sauss. — Eum. pomiformis statura, niger, dense pnnc- 

 tatus, fulvo-birsutus; secundo abd. segmento supra maxiuie gibboso. 

 margine canaliculato ; pronoto lato, subdepresso ; antennis omuino 

 nigris ; clypeo bidentato, % 9 nigro, cum macula in sumtno flava ; 

 macula frontal i, pronoti et abd. segmentorum margine, post-scutello et 

 macula subalari, sulfureis; tegulis, tibiis et tarsis, ferrugineis ; alis 

 snbhyalinis. 



Eumenes Iturbide Sauss. Revue et Mag. de Zool.. IX, 1857, 271. 

 Total length, 13 mm. ; wing, 0^ mm. 



9 . Clypeus deeply notched, very convex on its upper part; the 

 teeth of the cmargination long and triangular, slender and lamel- 



1 I have seen one of tins species with the green larva of a Diurnal lepi- 

 dopter. Mr. Walsh writes that he has found its nests stored with given 

 larvae. E. N. 



