ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 129 



This subgenus is Holarctic, Neotropic, and Oriental. It contains 

 two species groups, as defined in the key and descriptions below. 



Key to the species groups and to the Nearctic species of the subgenus 



Colpotrochia 



1. Lateral carina of propodeum entirely absent; epipleurum of second tergite less 



than 0.4 as wide as the tergite, its inner margin rather straight. Texana 



GROUP 2 



Lateral carina of propodeum present, usually complete; epipleurum of second 

 tergite more than 0.35 as wide as the tergite, its inner margin strongly bowed. 

 Elegantula group 3 



2. Areolet present; nervellus postf ureal; hind femur yellow, blackish behind and 



often also in front 1. texana (Cresson) 



Areolet absent; nervellus vertical; hind femur black, yellow at base and apex. 



2. crassipes (Provancher) 



3. Hind femur yellow; thorax mostly yellow; areolet present. 



3. fultoni, new species 

 Hind femur black; thorax mostly black; areolet absent. 



4. trifasciata (Cresson) 



I. TEXANA GROUP 



Areolet present except in the Nearctic C. crassipes and the Mexican 

 C. concinnus Cresson 1868; nervellus postfurcal or vertical; lateral 

 carina of propodeum entirely lacking; epipleurum of second tergite 

 relatively narrow with its inner margin rather straight, ranging from 

 about 0.1 to 0.4 as wide as its tergite; female subgenital plate tri- 

 angular and weakly convex to scooplike (strongly convex). 



The texana group includes a number of Neotropic species and two 

 Nearctic species. 



1. Colpotrochia (Colpotrochia) texana (Cresson) 



Exochodes (!) texana Cresson, 1872, Trans. Amer. Ent. Soc, vol. 4, p. 167; d". 



Type: d\ Comal County, Tex. (Philadelphia). 

 Ischyrocnemis Carolina Ashmead, 1890, Proc. U. S. Nat. Mus., vol. 12, p. 443; cf. 



Type: d\ North Carolina (Washington). 



Front wing 6.5 to 7.0 mm. long; areolet present; nervellus distinctly 

 postfurcal, broken a little above the middle; dorsal carinae of first 

 tergite not distinct; epipleurum of second tergite narrow, about 7 times 

 as long as wide; female subgenital plate scoop-shaped. 



Black. Scape, pedicel, mouth parts, tegula, scutellum, postscutel- 

 lum, and front and middle legs, yellow, the legs in part somewhat 

 tinged with orange. Pronotum except for a subdorsal spot, propleura, 

 lateral edge of mesoscutum, side of scutellum and postscutellum, upper 

 edge of mesopleurum, mesopleurum next its coxa, mesepimeron, meta- 

 pleurum below and posteriorly, propodeum except for a pair of dorsal 

 basal spots, hind leg except for blackish or infuscate areas of variable 

 extent on front and back of coxa and femur and brownish base and 



