418 HYMENOPTERA. 



neled and striated longitudinally before the ocelli, and trans- 

 versely so behind ; the mandibles and scape yellow, the latter with 

 a black spot behind; the base of the flagellum reddish-yellow, 

 the third joint emarginate at the base and thickened at the apex. 

 Thorax : the collar channeled, the lateral angles subdentate, and 

 having a yellow spot on each side, the tubercles yellow ; the raeso- 

 thorax longitudinally striated ; the scutellum shining and punc- 

 tured ; the metathorax very coarsely rugulose ; wings yellowish, a 

 narrow fuscous stain on the anterior margin beyond the stigma, 

 the nervures ferruginous ; the legs yellow, the intermediate femora 

 fuscous beneath, the posterior pair rufo-fuscous, yellowish at 

 their apex above; the apical joints of the tarsi black. Abdomen 

 smooth and shining, subpetiolate ; the second and four following 

 segments with an ovate macula on each side at theii' basal mar- 

 gins, each one smaller than the preceding. 



Hub. North America (Trenton Falls). (Coll. E. DouHeday, Esq.) 



130. CrABRO 6-MACUt,ATUS. B.M. 



Crabro 6-macvdatus, Say, Narr. Exped. St. Peter's River, Append. I 

 p. 74. 3. 



Hab. Pennsylvania. 



131. Crabro scutellatus. 



Crabro scutellatus. Say, Narr. Exped. St. Peter's River, Append. 

 p. 74. 2. 



Hab. Pennsylvania. 



132. Crabro scaber. 



Solenius scaber, St. Fare/. Ann. Soc, Ent. Fr. iii. 715. 2 c?; Hym. 

 iii. 121. 3. 



Dahlh. Hym. Europ. i. 387. 260. 



Hab. Philadelphia. 



133. Crabro rufipes. 



Ceratocolus rufipes, St. Farg. Ann. Soc. Ent. Fr. iii. 741. 2$; 

 Hym. iii. 146. 2. 



Dahlb. Hym. Europ. i. 381. 244. 



Hab. Carolina. 



134. Crabro obscurus. B.M. 



Female. Length 4 lines.^Black : head large, subquadrate ; 

 the ocelli in a triangle on the vertex ; the clypeus covered with 



