TI^.A.]SrS.A.CTIO]SrS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY. 



VOLUME VIII. 



Deseriptioii!>» of new North American HY.lIENOPTEK.l in 

 the collection of the American Entomological Society. 



BY E. T. CRESSON. 



Family TENTHREDINID^E. 



CIMBEX Oliv. 



Cimbex rnbida. — % J. — Ferruginous; tips of mandibles, spot on middle 

 lobe of inesothorax, pleura beneath, and most of venter, black; apex of antennae 

 orange-yellow; wings dark fuscous, violaceous, costal nerve ferruginous; legs 

 entirely ferruginous; apical margin of basal segments of abdomen sometimes 

 narrowly fuscous. Length .70 — .80 inch. 



Hah. — Nevada, (Morrison); California, (H. Edwards). 



Cimbex semitiea.— 9 .— Black ; head and thorax clothed with a short 

 fine mixed black and pale pubescence; antennae orange-yellow ; upper margin 

 of prothorax dilated laterally, dull luteous; wings yellow-hj'aline, a longi- 

 tudinal slightly oblique black cloud beneath stigma nearly covering the second 

 discoidal cell, apical margin of the wings fuliginous; legs black, tinged with 

 blue, tibiae and tarsi pale yellow; abdomen black, middle of segments 2 — 5 

 more or less, and remaining segments entirely, yellowish-ferruginous, some- 

 times quite dull; spot at extreme sides of segment one, broad band at sides 

 of 2 — 4, and spot at sides of five, white; venter blackish, ferruginous at tip. 

 Length .60— .65 inch. 



Hab. — White Mountains, N. H., (Diuimock). The legs are black, 

 with tibiae and tarsi yellowish. 



TRICIIIOSO.^IA Leach. 



Trichio««oma trianguliim Kirby.— var. aleutiana.— J .—Pubescence 

 of the head and thorax entirely black. Length .65 inch. 

 Hub. — Aleutian Islands, (H. l']d wards). 



ZAREA Leach. 



Zarea americana.— 9 .—Black, the head and thorax more or less tinged 

 with dark submetallic green, clothed with a rather long erect black pubescence, 

 slightly mixed with pale on vertex and mesothorax, the pubescence ou the 

 latter short and sparse; palpi, knees, tibiae and more or less of tarsi pale 



TRANS. AMER. ENT. SOC. VIII. (1) JA.NUARY, ISSO, 



