ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 139 



margin of face produced medially as a short broad triangle between 

 bases of antennae; lower half of frons with an inconspicuous median 

 carina which continues between antennal sockets to back side of in- 

 terantennal process of face; temple moderately convex; occipital 

 carina strong above, weak laterally, absent vent rally; cheek about 

 1 .0 as long as basal width of mandible ; mandible rather short, moder- 

 ately broad, tapered toward apex, its teeth broad, the lower tooth a 

 little shorter than upper tooth; labrum not projecting beyond margin 

 of clypeus; flagellum long, moderately slender; upper margin of pro- 

 notum not swollen, paralleled by a very weak submarginal impres- 

 sion; propleurum weakly convex; scutellum strongly convex, without 

 a lateral carina; areolet of moderate size, subrhombic, with a short 

 stalk above; nervulus interstitial; nervellus broken near its lower 0.4; 

 prepectal carina complete, its dorsal end at front margin of meso- 

 pleurum near midheight of hind margin of pronotum; sternaulus a 

 short, broad impression; metapleurum with coarse, rather sparse 

 punctures; propodeum short, its apical half sharply declivous, the 

 apex of its area dentipara produced as a short triangular tooth; pro- 

 podeum completely carinated except that costula is lacking and 

 areola and median basal area are confluent; propodeal spiracle elon- 

 gate; legs moderately stout; first trochanter of front and middle legs 

 almost completely fused with its femur; front spur of middle tibia 

 longer and stouter than hind spur; tarsal claws apparently simple; 

 abdomen approximately parallel-sided, rather short; first tergite broad 

 at base, its spiracle near its basal 0.3, its median dorsal carinae sharp 

 to its apex; second tergite traversed by a median dorsal pair of ca- 

 rinae ; epipleura of first and second tergites very narrow, of thud and 

 following tergites moderately wide; seventh tergite of male and sixth 

 tergite of female somewhat retracted; seventh tergite of female en- 

 tirely retracted; female subgenital plate large, subrhombic. 



This genus includes one Holarctic species and one Nearctic species 

 as treated below, plus two species described from Russia. 



Key to the Nearctic species of Spudaeus 



1. Hind femur and tibia uniformly ferruginous or fulvous; coxae and first tro- 

 chanters black, the hind coxa sometimes partly ferruginous. 



1. scaber (Gravenhorst) 



Hind femur fulvous, the femur black at apex and the tibia black at apex and 



at base; coxae and first trochanters fulvous, the coxae sometimes partly 



infuscate 2. indigus (Davis) 



1. Spudaeus scaber (Gravenborst) 



Figure 171,b 



Front wing 9.5 to 11.5 mm. long. Structurally similar to S. indigus 

 except that the body punctures tend to be a little stronger and the 



