NO. 2284. NEW NORTH AMERICAN ICHNEUMON-FLIES— CUSHMAN. 537 



distinct basal area ; apical carina broadly interrupted medially ; wings 

 hyaline with fuscous stigmal and apical bands, nervellus broken be- 

 low the middle ; exerted portion of ovipositor distinctly less than half 

 as long as abdomen. 



CRYPTOIDEUS? LUCTUOSUS (Provancher). 



Mesochorus hictiiosns Provancher, Nat. Can., vol. 6, 1874, p. 299. 

 Echthrus luctuosus Provancher, Faun. Ent. Can., Hym., 1883, p. 486. 



Because of the elongate spiracle this species is somewhat doubtfully 

 referred to the genus, but in all other ways it seems to agree very well. 

 Notes by Mr. Rohwer, who has seen the type, furnish the following 

 characters which distinguish it from agrili (Viereck) : malar space 

 longer than basal width of mandibles; eyes rimmed with red; first 

 !ind second flagellar joints subequal; sternauli indicated posteriorly 

 but not anteriorly, nervellus broken at the middle; basal carina of 

 propodeum curving apparently to base of segment ; wings dusky with 

 brownish oblique band below stigma. 



Other characters noted by Mr. Rohwer, which evidently ally it 

 closely to Cryptoideus and especially to agrili are: clypeus rounded, 

 well defined laterally but not basally ; inner margins of eyes parallel ; 

 front femora swollen beneath from base to beyond middle ; occipital 

 carina strong; posterior orbits narrov/er than e^^e; head coarsely 

 punctured; notauli present anteriorly; thorax with coarse punctures; 

 nervulus antef ureal ; discocubital vein wdth a stump ; pleural carina 

 of propodeum represented by a faint groove; apical carina present 

 laterally; propodeum punctured basad of first carina, behind it longi- 

 tudinally^ striato-punctate. 



According to Provancher the ovipositor is nearly as long as the 

 abdomen. 



CRYPTOIDEUS NUBILIPENNIS (Cresson). 



Cryptus nuhilipcnnia Cresson, Proc. Ent. Soc. Pliila., vol. 3, 1864, p. 291. 

 IJchthrus nnhilipcnnis Harrington, Can. Ent., vol. 2.5, 1893, p. 31. 



Differs from agHli (Viereck) principally as follows: Head behind 

 slightly narrower than eyes, temples strongly convex ; posterior orbits 

 distinctly brownish; flagellar joints 1 and 2 subequal; propodeal 

 carinae strong, the apical very high on upper hind angles; wings 

 yellowish with pale brownish bands ; legs beyond trochanters, except 

 apices of hind tibiae, the hind tarsi, and the bases of the front and 

 middle femora, which are fuscous, red; ovipositor nearly as long 

 as the abdomen. 



CRYPTOIDEUS BICOLOR, new species. 



Differs from all the species here included in coloration. 



Female. — Length, 8.5 mm. ; antennae, 6.5 mm. ; ovipositor, 3.5 mm. 

 Head and thorax densely, rather coarsely, punctate, striately so on 

 temples and the pleura; head seen from above as broad behind the 



