No. 2317. FIVE TRIBES OF IGHNEUMONINAE—ROHWER. 407 



Generic characters. — Head, as seen from above, rectangular in out- 

 line, not narrowed posteriorly; eyes large, their inner margins emargin- 

 ate above tbe antennae; posterior orbits somewhat less than half the 

 cephalo-caudad diameter of the eye, broader below; clypeus long, 

 depressed above the middle and clothed with hairs; clypeal suture 

 straight ; face more or less roughened and often with a medium carina 

 or tubercle; third antennal joint much shorter than the fourth and 

 fifth joints combined; prepectal carina extending well above the middle 

 of mesepisternum ; mesepisternum higher than cephalo-caudad length; 

 the scutum long and without notauli; scutellum not margined; propo- 

 deum areolated, sharply separated from the metanotum by a furrow, 

 but not separated laterally from the metapleura; propodeal spiracle 

 slit-like and well removed from the base; the first tergite straight and 

 subequal with the hind coxae; ovipositor at least nearly as long as 

 abdomen, compressed, straight below, tapering dorsally at apex, with- 

 out a notch, and apically with oblique ridges; four anterior tibiae 

 somewhat twisted ; hind coxae slender, elongate almost as long as the 

 femora or first tergite; apical joint of hind tarsi curved subequal in 

 length with the three preceding joints; claws strongly curbed; onychia 

 prominent; nerveilus perpendicular, angularly broken slightly above 

 the middle. 



Color used in a broad way, the general sculpture and the relative 

 length of the chitinized base part of the first sternite offer the best 

 specific characters. The areolation of the propodeum is subject to 

 such variation that it can not be used as a specific character and it is 

 doubtful if it can be relied upon even when used as loosely as it is in 

 the following key. Most of the Nearctic species are very closely allied 

 and subject to much variation as to details of color markings. The 

 characters presented in the following key have been found to be satis- 

 factory for the material examined. 



KEY TO THE SPECIES IN THE UNITED STATES NATIONAL MUSEUM. 



1. Body entirely smooth and polished; face with prominent lateral and median 



carinae 2, 



At least with distinct, though scattered punctures on the thorax; no dor8a,d-ventrad 

 carinae on the face along the eye margins 3. 



2. Propodeum with a black band basally; sides of the thorax marked with black; 



male trilineata Ashmead. 



Propodeum and sides of thorax yellowish; female gloriosa Cresson. 



3. Body entirely black nigra Rohwer. 



Body largely or entii-ely ferruginous or rufoferruginous 4. 



4. Body entirely rufo-ferruginous without markings; -fidngs yellowish-hyaline with the 



apical margin dusky tinctipennis Rohwer. 



Body ferruginous with black and yellowish markings; winga either entirely or in 

 the greater part brownish or in the males hyaline with a dusky margin . . 5 . 



5. Rather slender; chitinized basal part of the first sternite extending to or beyond a 



line drawn tangent to the caudal margin of the spiracle; basal area longer than 

 wide or with the length and width subequal 6. 



