ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 191 



tergite 2.2 to 2.5 as long as it is wide at laterobasal corners; second 

 tergite about 0.65 to 0.85 as long as wide, with small punctures of 

 which the interspaces are about 3.5 the diameter; epipleurum of 

 third tergite narrowly wedge-shaped, broadest posteriorly, its inner 

 edge straight or slightly concave. 



This group includes seven species, one Holarctic, three Nearctic, 

 and three Palaearctic. It is divisible into two subgroups as described 

 below. 



SEMIRUFUS SUBGROUP 



Notaulus a pit next to mesoscutal margin, the pit either circular 

 or slightly prolonged at right angles to mesoscutal margin; propodeum 

 rather elongate, its combined basal area and areola 1.9 to 2.3 as long 

 as wide. 



This subgroup includes the three Nearctic species listed below 

 and the European Exochus albicinctus Holmgren, 1873. 



7. Exochus bryanti, new species 



Figure 191,g 



Front wing 3.7 to 4.3 mm. long; flagellum with about 33 segments, 

 the median segments about 1.25 as long as wide in male, about 0.80 as 

 long as wide in female; metapleurum with usually a few discal hairs 

 just in front of and below its center, sometimes with more hairs and 

 often with none; second lateral area of propodeum with hairs in its 

 apicolateral 0.5; nervulus sometimes interstitial with basal vein, 

 but often distinctly distad of basal vein, to a distance up to 0.28 of 

 its length (nervulus exactly interstitial or very briefly distad of basal 

 vein in other members of the gravipes group). 



Black. Small spot at top of eye, maxilla, labium, and tegula, brown; 

 coxae and first trochanters blackish; legs beyond first trochanters 

 fulvous, the tibial spurs and tarsi a little paler, hind tibia a little 

 infuscate at apex, apex of first three segments of hind tarsus light 



Figure 112. — Localities for 

 Exochus bryanti. 



