ART. 16 NORTH AMERICAN ICHNEUMON-FLIES — CUSHMAN 45 



jflagellum successively gradually shorter, fourth to sixth each about 

 three-fourths as long as its predecessor, others very gradually shorter. 

 Thorax shining, punctate, the punctures mostly well separated; 

 pronotal and mesopleural impressions striate; mesoscutum more 

 densely punctuate, notauli very deep, complete, and strongly foveo- 

 late; scutellum polished, practically impunctate; propodeum with 

 apical carina complete and almost equally strong throughout, basal 

 areas densely punctate, middle areas more coarsely punctate, apical 

 face transversely rugose ; legs very slender. Abdomen very narrowly 

 fusiform, subpolished, very faintly coriaceous, first tergite slender 

 throughout, postpetiole barely twice as wide as petiole, nearly twice 

 as long beyond spiracles as broad, suture between sternite and tergite 

 obliterated ; second tergite nearly or quite thrice as long as broad at 

 base; sheath nearly as long as abdomen; ovipositor slender, slightly 

 compressed, decurved, apex in profile slightly sinuate. 



Head and thorax black with white markings as follows: Broad 

 orbital ring, broadly interrupted at top of eye and narrowly so be- 

 low; center of face and clypeus; mandibles largely; incomplete annu- 

 lus centering on suture between flagellar joints 7 and 8; anterior 

 and humeral margins of pronotum; median spot on mesoscutum; 

 scutellum; tegulae; subalar tubercle; elongate mark on lower edge 

 of mesopleurum; upper division of metapleurum and about upper 

 half of lower division; and posterior face of propodeum except a 

 broad median black stripe; wings clear hyaline, venation brown, 

 btigma paler; legs testaceous, front coxa and trochanter largely whit- 

 ish, hind tibia largely and tarsus yellowish; abdomen entirely pale 

 ferruginous. 



Male. — Like female except temples broader; face entirely white 

 antenna without annulus ; propodeum with middle areas very coarsely, 

 somewhat longitudinally rugose dorsally, transversely so laterally, 

 apical face coarsely reticulate rugose; thoracic markings slightly 

 smaller; basal joint of hind trochanter and femur dorsally piceous, 

 tibia largely black, more or less reddish below and near base, tarsus 

 yellow with apical joint and base of first joint black; abdomen very 

 slender, compressed, black with base and apex of first tergite and 

 broad apices of all others ferruginous. 



The type is from Illinois, where it is said to have been reared by 

 F. M. Webster as a parasite of a sawfly found on wheat. The other 

 specimens are as follows: Lawrence, Kans., July 13, 1896, Hugo 

 Kahl, one female ; Rosslyn, Va., H. H. Smith, one male ; Maryland — 

 Glen Echo, R. M. Fouts, one female ; Baltimore, one female ; District 

 of Columbia, June 15, 1914, F. Knnb; and one of each sex without 

 labels. 



