194 U. S. NATIONAL MUSEUM BULLETIN 216 



9. Exochus elimatus, new species 



Figure 191,i 



Front wing 4.7 to 5.3 mm. long; flagellum with about 38 segments, 

 the median segments of the male flagellum about 1.0 as long as wide, 

 of female flagellum about 0.88 as long as wide; metapleurum with 

 scattered hairs covering about 75 percent of its surface in male, cover- 

 ing about 40 percent of its surface in female; second lateral area of 

 propodeum with hairs in its apicolateral 0.35 ±. 



Black. Interantennal process, small spot at top of eye, sometimes 

 apical 0.5 of mandible, maxilla, and labium, brown; tegula light brown, 

 yellow basolaterally ; legs beyond first trochanters ferruginous, the 

 tarsi, especially the hind tarsus, more or less infuscate, with basal part 

 of the basi tarsi paler; abdomen ferruginous, black apically and basally, 

 sometimes mostly blackish with only the median tergites partly 

 ferruginous. 



This species is very close to the eastern species E. semirufus, from 

 which it differs in the more extensive black coloration, shorter flagellar 

 segments, more polished appearance with shorter body hairs, and 

 somewhat smaller size. It may prove to be only a subspecies of 

 semirufus. 



Type: cT, Phantom Valley in the Rocky Mountain National Park 

 at 9,400 ft., Colo., Aug. 8, 1948, H., M., D., and J. Townes (Washing- 

 ton, USNM 63649). 



Paratypes: 4d", 39, same locality and collectors as type, Aug. 8, 9, 

 and 12, 1948 (Townes). 



GRAVIPES SUBGROUP 



Notaulus an ovoid impression next to margin of mesoscutum, the 

 long axis of the impression paralleling mesoscutal margin; meta- 

 pleurum with few discal hairs which usually cover less than a third of 

 its surface; propodeum not particularly elongate, its combined basal 

 area and areola 1.5 to 1.7 as long as wide. 



This subgroup includes the Holarctic Exochus gravipes (Graven- 

 horst) 1820, and the European E. gravis Gravenhorst 1829, and E. 

 incidens Thomson 1895. All three are structurally very similar to 

 each other, and they may not be distinct species. 



10. Exochus gravipes (Gravenhorst) 



Figures 177,b; 189,c; 192,a 



Ichneumon gravipes Gravenhorst, 1820, Mem. Accad. Sci. Torino, vol. 24, p. 384J 

 d\ 9 . Lectotype (hereby selected): 9 , no data but presumably from Ger- 

 many, labeled lectotype (Wroclau). 



Front wing 4.6 to 6.3 mm. long. 



Black. Interantennal process and small spot at top of eye yellowish; 

 maxilla and labium medium brown to blackish; tegula light to dark 



