ICHNEUMON-FLIES OF AMERICA: 1. METOPIESTAE 35 



4. Face 1.89 to 2.25 as wide as high, bulging above base of clypeus (fig. 1 79,e). 



22. onilis (Davis) 

 Face about 1.6 as wide as high, not bulging above base of clypeus 5 



5. Middle half of apical margin of clypeus truncate or weakly convex; second 



segment of middle tarsus about 2.05 as long as wide in male, about 1.85 



as long as wide in female 20. arcuatus, new species 



Middle half of apical margin of clypeus faintly (most males) to distinctly 

 (females) concave; second segment of middle tarsus about 1.5 as long as 

 wide in male, about 1.4 as long as wide in female. Males are not always 

 distinguishable from those of T. arcuatus .... 21. diffidens, new species 



6. Metapleurum with a group of hairs in its upper hind part, next to the pleural 



carina, the hairs numbering 6 to 40 or more (figs. 180,a-h). Texanus 



group 7 



Metapleurum without a group of hairs in its upper hind part, entirely hair- 

 less except often for a small group in its upper front corner and rarely one 

 to several hairs scattered on its disc (figs. 181,a to 182,a). Integer 



GROUP 14 



7. Sublateral longitudinal carina of second tergite distinct on basal 0.25 of 



tergite but obsolescent beyond middle of tergite; face black, with a broad 



vertical yellowish mark next to eye (fig. 178,o) . . . 5. . teres, new species 



Sublateral longitudinal carina of second tergite distinct and sharp the entire 



length of the tergite; face not colored as above 8 



8. Clypeus separated from face by a weak depression; punctures on central 



part of face separated by about 0.7 their diameter; second tergite about 

 0.78 as long as wide in male, about 0.65 as long as wide in female. 



1. m a son i, new species 

 Clypeus not separated from face by a depression, the clypeus and face making 

 a continuous convex surface, or sometimes there is a flattening (but not a 

 concavity) at the juncture of the clypeus and face; punctures on central 

 part of face subadjacent to separated by about 0.5 their diameter; second 

 tergite 0.74 to 0.87 as long as wide 9 



9. Front wing 2.9 to 3.5 mm. long 7. sapineus, new species 



Front wing 3.8 to 5.4 mm. long 10 



10. Hairs on metapleurum in a narrow continuous band beneath the pleural 



carina, that is narrowed forward to the upper front corner, but not inter- 

 rupted (fig. 180,d); tegula entirely black ... 4. tegularis, new species 

 Hairs on metapleurum in a large posterodorsal group beneath the pleural 

 carina that does not reach the upper front corner of metapleurum, some- 

 times also a small separate group of hairs in the upper front corner (figs. 

 180,b,c,f,h) ; tegula pale yellow to fulvous 11 



11. Face and clypeus with coarse, subadjacent punctures, without distinct 



interspaces 6. densus, new species 



Face and clypeus with moderate sized punctures that are separated by 0.3 to 

 0.5 their diameter 12 



12. Metapleurum without hairs in its upper front corner (fig. 180,h); second 



segment of middle tarsus about 1.8 as long as wide in male, about 0.95 

 as long as wide in female; mandible of female dark brown. 



8. texanus (Cresson) 



Metapleurum with a group of 12 or more hairs in its upper front corner 



(figs. 180,b,c); second segment of middle tarsus about 2.0 or 2.2 as long as 



wide in male, about 1.7 or 1.8 as long as wide in female; mandible of female 



yellow or fulvous 13 



