KO. 2840. TRIBE EPHIALTINI OF THE ICHNEUMONINAE—CUSHMAN. 339 



ally, polished medially and posteriorly, with more or less trans- 

 verse rugosity separating posterior from dorsal surface; the spira- 

 cles round to broad oval; first tergite with dorsal carinae obsolescent, 

 the anterior face nearly flat; not elevated on each side of middle at 

 summit. 



Very closely allied to tenuicornis (Cresson) and possibly synony- 

 mous with that species. Practically all of the characters separat- 

 ing the two have been listed in the key, and aequalis varies in all of 

 these toward tenuicornis. The front tibiae in the female vary from 

 deeply excavated to nearly straight below; the middle tibiae vary 

 from distinctly white annulate to entirely red; the tegulae are fre- 

 quently brownish at apices; and the front coxae are sometimes 

 piceous at base. In size the females m the United States National 

 Museum vary from 4.5 mm. to 13 mm. and the male from 3.5 mm. to 

 10 mm. Normally the abdomen is black with the apices of the 

 tergites narrowly piceous, but some specimens have the piceous 

 bands broadening out at each side to include a broad lateral space, 

 and in some of the reared specimens the abdomen is entirely brownish 

 with the apices of the tergites slightly paler. 



There is some variation in the length of the malar space, relative 

 width of face and vertex, concavity of frons, and diameter of ocelli 

 with respect to length of ocell-ocular line. In some specimens the 

 transverse rugosity of the propodeum amounts almost to a carina 

 and there are two well-defined longitudinal carinae, these eleva- 

 tions setting off a dorsal and a posterior polished area. 



Distribution. — Now Brunswick to Wisconsin, south to New Mexico 

 and Florida, the National Museum containing specimens from the 

 following States: New Hampshire, Massachusetts, New York, New 

 Jersey, Pennsylvania, Maryland, District of Columbia, Vu'ginia, 

 West Virginia, Georgia, Florida, Alabama, Louisiana, Arkansas, 

 Texas, New Mexico, Kansas, Nebraska, Missouri, Colorado, Wiscon- 

 sin, Michigan, Illinois, and Indiana, in addition to one from New 

 Brunswick and many labeled simply Canada. 



Hosts. — SynantJiedon pidipes; Alabama argillacea; Mineola fug- 

 landis; Laspeyrcsia pomonella; Proteropteryx bolliana; Recurvaria 

 nanella; Euzophera semifuneralis. The above host records are 

 found in the National Museum series, Dalla Torre lists the fol- 

 lowing under Pimpla annulipes: Acrohasis {Mineola) juglandis, 

 Carpocapsa pomonella {PJiycita nebulo), Mineola indigenella, Papilio 

 ajax, Datana minislra, Tortrix quercifoliana, Teras {Aclens) oxycoccana 

 Eeterocampa marthesia, GelecTiia {Gnorimoschema) gallaeasterella, all 

 on the authority of Riley; Chlorippe clytonl and Iphiclides ajax, on 

 authority of Howard; and Crambus exsiccatus, quoting Weed. 



