No. 2317. FIVE TRIBES OF ICHNEUMONINAE—ROHWER. 455 



species describing a few new species. Since then Provancher has 

 described one new species and Rohwer has described five. As far as 

 known all of the species are parasitic on wood-boring Coleoptera. 



The genus is easily recognized by the dentate hind femora; all of 

 the North American species are shining, with but little or no sculp- 

 ture; the thorax is depressed, the notauli complete; antennae longer 

 than the body; the apical part of the clypeus depressed forming a 

 more or less distinct mouth opening; propodeum usually longer than 

 scutum, always more or less areolated; in only one of the species the 

 median carinae are wanting and the dorsal lateral angles but feebly 

 toothed; propodeal spiracle elongate, well removed from the base; 

 abdomen subpetiolate; ovipositor as long as or longer than the body; 

 nervellus reclivous, broken at or below the middle; claws simple; 

 middle tibiae, of female, twisted. 



For the larger groups the best specific characters are to be found in 

 the color; the areolation of the propodeum is subject to considerable 

 variation and can not be considered as a specific character; in some 

 of the species the costulae join the median carinae before their mid- 

 dle, while in others they unite with the median carinae behind the 

 middle there is so much variation that this could not be used as a 

 specific character; the position of the nervulus varies from an tef ureal 

 to postf ureal even within a species; the point of fracture of the ner- 

 vellus is subject to some variation but is fairly constant within a 

 species. 



TABLE TO THE SPECIES. 



1. Abdomen red 2. 



Abdomen black 6. 



2. Legs entirely black atripes Rohwer. 



Legs mostly red 3. 



3. Coxae and trochanters black abdominalis Cresson. 



Coxae and trochanters rufous 4. 



4. Sides of the propodeum coarsely punctured ; notauli strongly foveolate ; baae of sec- 



ond and third tergites transversely aciculate; median area of the propodeum 

 not strongly angled and at least four times as long as basal width; propodeal 



tooth below the dorsal lateral angle bicolor Cresson. 



Sides of the propodeum finely punctured ; notauli not or but very sparsely acicu- 

 late; median area of the propodeum sharply angulate and about three times as 

 long as basal width ; propodeal tooth on dorsal lateral angle 5. 



5. Basal area almost completely closed posteriorly; posterior lateral face of scutellum 



and the depression of the metanotum without rugae; second recurrent more 

 than the length of the intercubitus from the in tercubitus. ..sfran^aZtae Rohwer. 

 Basal area indicated but not closed posteriorly; posterior lateral face of scutelium 

 and depression of metanotum with rugae; the second recurrent the length of the 

 intercubitus from the intercubitus dichrous Rohwer. 



6. Legs entu-ely black 7. 



At least four anterior legs pale 8. 



7. Male with the second and third tergites rather densely punctured; female stout; 



ovipositor longer than the body aethiops Cresson. 



Second and following tergites nearly impunctate atripes Rohwer male. 



