AMERICAN HYMENOPTERA. 41 



% . Antennfe luteous, the tlii'ee basal articles more or less black ; 

 head and thorax black, with a bluish tinge; abdomen steel-blue, often 

 tinged with purple j pectus widened and rounded, forming an acute 

 angle with pleura; body and tibiae thinly covered with long, blackish 

 hair; legs long and stout; color blue, the second, third, fourth, and 

 base of fifth tarsal joints testaceous. Wings hyaline, their apex and a 

 spot below stigma fuscous. 



9 • The female differs only from the male in having yellowish spots 

 on each side of the abdomen, varying in number, size and form. 



Both sexes differ in the color of the wings, some being clear and 

 some violaceous. And the males differ in the color of the abdomen, 

 some having it rufous. The abdominal spots also vary much in the 

 females, thereby causing much confusion among different authors. 

 a.) t. C. americana, %, as above. 



With clear wings ; abdomen of 9 6-spotted, spots on the third 

 fourth and fifth segments. 



Canada, Massachusetts, Connecticut, Georgia, (Leach.) 



a.) 2. C. americana, var. Uhni, % . 



Cimbex uhni, Peck., MS. Harris Cat. and Inj. Ins., 9- 



Emmons, Nat. Hist. N. Y. Agric. V, 101, % 9. 

 Wings more or less obscure violaceous ; abdomen of 9 6-spotted : 

 spots on the third, fourth and fifth segments. 

 h.) 1. C. americana, var. LaPorfei. % . 



With clear wings; abdomen, except at base, chestnut or purplish-red. 

 Mt. Washington, N. H. ; Canada. 



b.) 2. var. LaPortd, % . 



Cimbex LaPortei, Lepel, Ann. Soc. Ent. II, 183.3, 454, % . 

 Cimbex Kirbyi, Brulle, Hym. IV, 672, % . 

 Wings obscure violaceous; abdomen, except at base, chestnut or 

 purplish-red. 



Mass., Conn., New York. 

 No females as yet seen with this variation. 

 c.) 1. C. americana, var. luctifera, 9 • 



Wings hyaline; abdomen 8-spotted; on each side of second, third, 

 fourth and fifth segments. 

 New England; Canada. 

 c.) 2. C. americana, var. luctifera. 



Cimbex luctifera, King, Verhandl, <fec., Berlin I, 85, ^ %. Jahrb. I, 225, % . 

 Cimbex viardi, Lepel, Ann. Soc. Ent. II, 454, 9 • 

 Wings obscure violaceous; abdomen 8-spotted; on each side of se- 

 cond, third, fourth and fifth segments. 



Greorgia, (Klug.) New York ; Pennsylvania. 



TRANS. AMER. ENT. SOC. ( 6 ) JUNE, 1867. 



