ICHNEUMON-FLIES — GELINAE I MESOSTENINI 461 



burg, Little River on Sugarland Mt. in Great Smoky Mountains 

 National Park, and at Headquarters of Great Smoky Mountains 

 National Park); Texas (Dallas); Virginia (Chain Bridge near McLean, 

 near Culpeper, Dayton, Dixie Landing, Falls Church, Glencarlyn, 

 Great Falls, Mount Vernon, and Rosslyn) ; and West Virginia (Bolivar, 

 Cheat River, and Jackson Mill in Lewis Co.). 



Collection dates are from late spring to early fall. Unusually early 

 and late seasonal records are: February 22 at Paradise Key, Fla.; 

 "March" at Orlando, Fla.; April 17 at Dallas, Tex.; May 2 at Glen- 

 carlyn, Va.; May 4 at Cantwell Cliffs, Ohio; May 6 at East Ridge, 

 Tenn.; June 7 at South Hadley, Mass.; September 23, 25, and 26 at 

 Bolivar, W. Va.; October 10 and 13 at Plummers Island, Md.; and 

 October 15 at Takoma Park, Md. 



We find the species in heavy undergrowth of moist deciduous 

 woods, particularly in stream bottoms. 



This species occurs in the CaroUnian, Austroriparian, and Tropical 

 faunas. 



3. SUBTRIBE NEMATOPODIINA 



Clypeus wide, rather weakly convex, its apical margin broadly 

 truncate or weakly arcuate, without a median tooth or lobe; mandible 

 about 4.5 as long as it is wide at middle, strongly narrowed from 

 base and slender apically, its upper tooth much longer than lower 

 tooth, the lower tooth sometimes weak or absent, the lower margin 

 of mandible usually prominent and bowed outward; flagellum rather 

 slender, ending in a rounded point; thorax and propodeum rather 

 short to rather long ; basal transverse carina of propodeum sharp and 

 complete; apical transverse carina of propodeum complete, incomplete, 

 or often absent, never with a sublaterai crest or tooth; propodeal 

 spiracle short elhptic to elongate; front tibia of female not inflated; 

 fourth tarsal segments of female cyhndric or somewhat compressed, 

 with a few weak bristles at apex, not bilobed; areolet varjdng from 

 large to very small, pentagonal or quadrangular, sometimes a little 

 longer than high, when small its apex sometimes open; first tergite 

 wealdy expanded apically, sometimes almost parallel sided, its spiracle 

 at or behind the middle; female subgenital plate not unusually large 

 and sclerotized; ovipositor moderately short to long, usually cylindric, 

 its apex usually either with coarse teeth on dorsal valve or with the 

 tip depressed and the tips of the lower valves enclosing the upper 

 valve. 



This group includes genera that, so far as known, are parasitic in 

 the nests of wasps making mud nests, including vespids, psammo- 

 charids, and sphecids. There are two Nearctic genera. 



