ART. 20. ICHNEUMON-FLIES OF TRIBE PANISCINI CUSHMAN. 



39 



these two characters, the more briefly postf ureal nervulus, and the 

 yellow vertex, the species is very similar to geminatus (Say). 



PANISCUS FALLENS new species. 



Female.— Length 16 mm; antennae (broken but in another female 

 of the same size 14 mm.). 



Temples very narrow and weakly convex; ocelli large, practically 

 contiguous with the eyes; face fully a half wider than frons, fully as 

 long as wide, minutely subopaquely shagreened and sparsely punctate ; 

 clypeus weakly convex, weakly arcuately truncate, sculptured like 

 face but with coarser punctures; antennae (broken but in another 

 female with the middle and subapical joints hardly twice as long as 

 thick, tapering toward apex). Thorax shining, weakly sculptured; 

 notauli long; scutellum margined to apex, the space between the 

 carinae long, about twice as wide at base as at apex; metapleurum 

 ratherdensely but weakly punctate; propodeum very finely trans- 

 versely striate, apophyses rather weak; areolet subpetiolate, sub- 

 quadrangular; second recurrent interstitial, straight below, strongly 

 curved above; nervulus postfurcal by less than half its length; post- 

 nervulus broken at about upper third; nervellus broken at a right 

 angle at upper third; legs moderate, apical joint of middle tarsus 

 nearly or quite as long as second, claws rather large with about 

 twelve large teeth. Abdomen moderate; first tergite four and one- 

 half times as long as wide at apex; second tergite more than twice 

 as long as wide at base, nearly parallel-sided; ovipositor sheath much 

 shorter than first tergite. 



Pallid testaceous; head except occiput, scutellum, sutures between 

 pleura, and anterior margin of pronotum stramineous; antennae 

 bright ferruginous; legs concolorous, tibiae and tarsi stramineous; 

 wings hyaline, venation dark, stigma and costa pale; sheath pale at 

 base, fuscous at apex. 



jfo^g, —Essentially like female; apical tarsal joint shorter; claw 

 smaller with teeth much denser especially at base and apex. The 

 pale color of thorax more extensive. 



Type-locality.— Rossljn, Virginia. 



Allotype-locality.—'Plnmmer Island, Maryland. 



Type.— Ca,t. No. 25998, U.S.N.M. 



Nine females and five males as follows: Type (H. H. Smith); allo- 

 type and two other males from same locality (H. S. Barber, at light) ; 

 Virginia, near Plummer Island (H. L. Viereck) ; Falls Church and 

 Vienna, Virginia (R. A. Cushman); District of Columbia; Coleta, 

 Alabama (H. H. Smith) ; Thomson's Mills, Georgia (H. A. Allard) ; 

 Nueces, Texas (C. L. Marlatt) ; Las Cruces, New Mexico (T. D. A. 

 Cockerell) ; Denver, Colorado. 



In size the typical form varies from 14 mm. (the smallest male) to 

 18 mm. (the largest female). Certain conspicuously smaller speci- 



