ABT. 11 NORTH AMERICAN ICHNEUMON-FLIES DeGANT d 



near the middle; postpetiole slightly wider than petiole, smooth at 

 apex ; second tergite with a slight depression at base, less than one- 

 third as wide at base as at apex; third tergite slightly constricted 

 at base. Wings hyaline, veins and stigma dark; submedian cell 

 equal to, or slightly shorter than, median ; discocubitus broken, with- 

 out a ramellus; length of radial cell on metacarpus about one-half 

 longer than stigma; nervellus broken far below the middle; sub- 

 discoidiella obsolete. 



Black, palpi stramineous; scape, base of first flagellar joint, 

 mandibles except at apex, tegulae, and a spot at apex of postpetiole 

 reddish testaceous; legs ferruginous, the front and middle tibiae 

 paler, the front tarsi stramineous, the middle tarsi infuscate apically, 

 and the hind tibiae and tarsi fuscous. 



Male. — Essentially like the female aside from the secondary sexual 

 characters. 



Type locality. — Parr Island, East Spence Lake, Ontario, Canada.^ 



Ty^pe.— U.S.N.M. No. 44126. 



Remarks. — Described from many specimens collected by the writer 

 at type locality on July 6, 1931. Paratype B, female and male, is 

 deposited in the Academy of Natural Sciences of Philadelphia. 



The host of this species should be easily ascertained, as P. insula 

 will be found working on a very small plant that grows among the 

 pebbles near the water. 



EXOLYTUS MELANOSCELIS, new species 



Near to E. ithacae Ashmead in having the frons transversely 

 striate, but distinguished from that species by the black legs. 



Female. — ^Length 14 mm, antennae 25-jointed, first joint longer 

 than second, second longer than third ; ovipositor 1 mm. Head sub- 

 quadrate, face produced, with a small tubercle below antennae, cov- 

 ered with long hairs ; clypeus short, sparsely punctate, rounded and 

 polished at apex ; malar space two-thirds basal width of mandibles ; 

 temples broad, convex, about equal to short diameter of eye; eyes 

 ovate; diameter of an ocellus about one-third ocellocular line. 

 Notauli defined anteriorly; mesoscutum smooth, polished, slightly 

 punctate anteriorly; scutellar groove crenulate, scutellum slightly 

 convex, triangular, margined to middle; mesopleurum smooth, pol- 

 ished, longitudinally striate above the coxae, prepectal carinae 

 strongly defined, ending at subalar tubercle; sternaulus deep, crenu- 

 late. Metapleurum punctate ; propodeum long, extending to middle 

 of hind coxae, gradually sloping from base to apex, carinae prom- 

 inent, areola smooth, polished, the portion beyond transversely 

 striate, which with the longitudinal carinae forms a reticulation at 



1 Parr Island, comprising about 12 acres, lies south of Picton, Ontario, in East Spence 

 Lake. 



