THE NORTH AMERICAN ICHNEIBION-FLIES OF THE TRIBE 

 EPIIIALTINI. 



By R. A. CusHMAN, 

 Oftlie Bureau of Entomology , United States Department of Agriculture. 



INTRODUCTION. 



This paper is a further contribution to a revision of the subfamily 

 (Pimplinae) Ichneumoninae undertaken by Mr. S. A. Rohwer and the 

 writer. It treats of the tribe Ephialtini as defined by Cushman and 

 Rohwer in the first paper of the series.^ 



The drawing of Ephialtes (Itoj^lectis) conquisitor (Say) is by Miss 

 Mary Carmody and the photographs by Mr. J. H. Paine, both formerly 

 of the Bureau of Entomology, United States Department of Agri- 

 culture. 



Tribe EPHIALTINI, Cushman and Rohwer. 



In the Nearctic fauna, and indeed in that of the Holarctic region, 

 this tribe includes only two genera, Epliialtes Schrank,^ with its sub- 

 genus Itoplectis Foerster, and ApecWiis Foerster. In other regions, 

 notably the oriental region, there are other genera referable to this 

 tribe. All of these genera have heretofore been referred to the tribe 

 (Pimplini) Ichneumonini. 



So far as their host relations are known the members of this tribe 

 are internally parasitic in lepidopterous pupae. 



Description.— Hq&c\. thin antero-posteriorly, the temples strongly 

 sloping toward the occipital carina, the latter complete; frons con- 

 cave; eyes sinuate to sharply emarginate opposite antennae; man- 

 dibles bidentate, the teeth equal in length; antennae from long fili- 

 form to subclavate ; pronotum very short dorsally, the head set very 

 close to the prescutum; thorax stout, ovate; mesoscutum with or 

 without notauli, but the prescutum short, not extending far before 

 the lateral lobes, notauli when complete converging posteriorly, deep 

 and pitlike anteriorly, where they are bounded by a sharp carina that 

 runs backward along the lateral margin of the lateral lobe; lateral 



I Cushman and Rohwer, Proc. U. S. Nat. Mas., vol. 57, 1920, pp. 379-396. 



»(-»PimplIdea Vioreck) not Ephialtes Gravenhorst. The reasons for this change are fully set forth 

 bv Cushman an;! Rohwer, Proc. Ent. Soc. Wash., vol. 20, No. 9, 191S (Wigt, pp. lSS-188. 



PROCEEDINGS U. S. NATIONAL MUSEUM. VOL. 58-NO. 2340. 



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