AMERICAN HYMENOPTERA. 363 



9 . — Black, antennoc 23 — 25-join(ed. yellow; head and thorax rather 

 densely covered with blackish hair; abdomen wide and stouter than in 

 other species, cornus long, constricted, lance shaped, serrate, ovipositor 

 not as long as abdomen with cornus, she:ith polished, roughened at tip ; 

 a large oval spot outside of each eye, a band on the second, seventh 

 and half of eighth segments of tergum, cornus and base of oviposi- 

 tor reddish yellow; legs at base black; tips of femora, the tibise and 

 tarsi yellowish, apex of posterior tibiae and tips of claws blackish ; wings 

 yellow hyaline, nervures yellowish ; cross-nervure of second brachial 

 cell wanting. 



Labrador, Can., Conn., N. Y., Colorado, Mackenzie River, Gt. Lake. 

 Wash. Terr. Yukon River, Arct. Am. (Smiths. Inst.). 



Well known in England by the name of S. hizoiiafiis. Taken near 

 London. Supposed by Mr. Kirby to have been imported in timber 

 from Canada. 



It is difficult to see how Mr. Stephens could give it this name, if he 

 had looked at the description by Fabricius above quoted. 



B. — Ovipositor longer than the icholc hodj. 



11. IT. caudatus. 



Urocerus caudatus, Cresson, Proc. Ent. Soc. Phil, iv, 1865, 247, 2,9- 

 Black, prothor.TX nnrrow, rugose, with a stripe on each side and a spot on each 



side of occiput whitish ; legs obscure lutcous; ovipositor longer than abdomen. 



Long 9.0.fi0— 1.00, vvithovip. 0.92— 1.5G. Br. wings, 1-00—1.56 inch. Long %, 



0.72. Br. wings, 1 inch. 



9. — Black, rather slender, sericeous, head as wide as thorax ; an- 

 tennce long, 23-jointed, basal article pitted ; head and thorax sparsely 

 pubescent, closely pitted, summit and sides of head polished; collar 

 produced, not stout; cornus constricted, sub lanceolate, scarcely en- 

 larged, polished, serrate (not so slender as in U.fiavicoriii.s), ovipositor 

 longer than body from head to tip of cornus, obliquely channeled, 

 piceous, about the base rufous; a round dot on each side of occiput, a 

 wide stripe from teguhc over forward angles of prothorax to neck, 

 white; legs yellow red, all of one color; first joint of posterior tarsi 

 nearly as long as tibijc ; wings hyaline, apical margins clouded, a small 

 clouded spot near end of lanceolate cell; second brachial cell without 

 second cross-nervuro. 



% . — The male is (juitc slender, shining, with long abdomen ; anten- 

 n;c 21-j()inted ; no white spots on sides of head ; a white stripe on collar 

 as in female; abdomen with the half of each segment polished ; cornus 

 bug, not constricted, granulated, a serrated ridge around the sides; 



