ICHNEUMON-FLIES — GELINAE : MESOSTENINI 349 



Ithaca, and Kiverhead) ; Ohio (Montgomery Co.) ; Pennsylvania 

 (Paiipack and Spring Brook) ; Rhode Ishmd (Kingston and Westerly) ; 

 Tennessee (Great Smoky Mountains National Park) ; and Virginia 

 (Falls Church and Skyline Drive). 



Collection dates are from late spring to early August. The earliest 

 and latest records are: May 10 at Riverhead, N.Y. ; May 22 at 

 Ithaca, N.Y.; August 2 in Montgomery Co., Ohio; August 5 on the 

 Skyline Drive, Va.; and August 13 at Westerly, R.I. 



This species is widely distributed in eastern United States. 



6. Trychosis sulcata, new species 



Figure 387 



Front wing 4.2 to 6.5 mm. long; second segment of male flagellum 

 about 2.6 as long as \\ade, of female flagellum about 4.8 as long as 

 wide; hind femur about 5.6 as long as deep in male, about 5.4 as long 

 as deep in female; notaulus strongly impressed, especially in male, 

 reaching a little beyond center of mesoscutum. Structure other\vise 

 as described for T. apicalis. 



Male: Black. Palpi white, the basal 0.7it of their fh'st segments 

 brownish; tegula black; second trochanters fuscoferruginous ; femora 

 ferruginous, the apex of hind femur infuscate; front and middle 

 tibiae and front tarsus fulvous, the fifth segment of front tarsus brown; 

 middle tarsus fulvous brown, its fifth segment bro\Mi; hind tibia 

 black; hind basitarsus black, often its apical 0.4 or less white; segments 

 2-4 of hind tarsus white; segment 5 of liind tarsus black; wings sub- 

 hyaline; fii'st segment of abdomen varjdng from ferruginous to black; 

 tergites 2 and 3 black, the apical 0.35 ± more or less infuscate; 

 tergites 4 and following black, the base of tergite 4 often ferruginous. 



Female: Black. Palpi white, the basal 0.7 ± of their fu'st segments 

 brown; flagellum blacldsh brown, brown below, with a median white 

 incomplete band that covers about 3.4 segments; tegula black; second 

 trochanters partl}^ ferruginous or fulvous or stained with these colors; 

 front and middle legs bej'ond trochanters fulvous, their tarsi brown 

 apicall}^; hind femur ferruginous, its apex infuscate ; hind tibia black- 

 ish, more or less brownish basally and below; hind basitarsus blackish, 

 its apical 0.4 or less often whitish; segments 2-4 of hind tarsus whitish 

 and segment 5 black; \vings subhj^aline; fh'st abdominal segment 

 ferruginous apically, shading to blackish basally; tergites 2 and 3 

 ferruginous; tergites 4 and foUowing black, the apical margins of 

 tergites 4 and 5 usually ferruginous. 



The long notauli, black fourth tergite, black tegula, and white palpi 

 distinguish this species. 



Type: 9, Moorestown, N.J., Aug. 13, 1939, H. and M. Townes 

 (Washington, USNM 63807). 



