ICHNEUMON-FLIES OF AMERICA I 1. METOPILNAE 185 



brownish medially and below; notaulus sharp but short; metapleurum 

 without discal hairs; costula present; second lateral area of propodeum 

 almost bare, with a very few hairs apicolaterally; median longitudinal 

 carinae of propodeum usually obsolescent apicad of basal transverse 

 carina, but sometimes strong; apical transverse carina of propodeum 

 strong between pleural and lateral longitudinal carinae, usually obso- 

 lescent or obsolete mesad of lateral longitudinal carinae, but some- 

 times complete; nervulus distad of basal vein by about 0.3 its length; 

 front spur of middle tibia about 0.75 as long as hind spur; second seg- 

 ment of middle tarsus about 1.5 as long as wide; first tergite 2.1 to 3.8 

 as long as it is wide at laterobasal corners; second tergite about 0.7 as 

 long as wide, with fine weak punctures of which the interspaces are 

 about 4 times the diameter; epipleurum of third tergite usually nar- 

 rowly wedge-shaped, widest posteriori} 7 , its inner edge weakly con- 

 cave (always thus in the three Nearctic species), sometimes the epi- 

 pleurum broader and with the inner margin rather evenly convex. 



This group includes the three Nearctic species treated below (one 

 of which occurs also in Europe) and a large number of species in the 

 cloud forests of the Orient, usually above 5,000 feet elevation. We 

 have seven unidentified species from those areas, and according to 

 their descriptions, Exochus flavicaput Alorley, 1913, from 6,000 ft. 

 elevation in Sikkim, and E. jiavinotum Morley, 1913, from 6,400 ft. 

 elevation in Assam, also belong to this species group. 



4. Exochus pictus Holmgren 



Figures 179,g; 188,c; 189,b; 191, d 



Front wing 4.2 to 5.2 mm. long; lower front edge of metapleurum 

 produced ventrad as a flange that is about 0.4 as deep as long; costula 

 usually complete and strong; median longitudinal carinae of propo- 

 deum present on basal part of areola but fading out apically or con- 

 tinuing faintly to reach the posterior transverse carina; posterior 

 carina of propodeum strong between pleural and lateral longitudinal 

 carinae, present mesad of lateral longitudinal carina, usually as a 

 projecting stub and indicated again as weak mounds at intersections 

 with median longitudinal carinae, elsewhere usually absent or vestigial 

 but in some males complete; first tergite about 1.35 as long as wide in 

 male, about 1.40 as long as wide in female. 



There are European and American subspecies, distinguishable on 

 color as in the key below: 



1. Yellow on upper margin of pronotum not or rarely extending as far forward 

 as the epomia; hind coxa black or blackish in both sexes; range: Europe. 



4a. pictus pictus Holmgren 



Yellow on upper margin of pronotum extending forward to reach the epomia; 



hind coxa fulvous, sometimes black or blackish in males; range: North 



America 4b. pictus xanthopsis Ashmead 



