AMERICAN HYMENOPTERA. 207 



subpolisliGd. basal plate. Abdomen subpolished, bright fulvo-rufous, 

 the basal edge of joint one, next the basal membrane, which is whitish, 

 clouded with black. Genitals obfuscated. Legs black. Wings sub- 

 hyaline, slightly tinged with fuliginous, veins and stigma black. 



Rock Island, 111. 



One S bred March 29, from an old subpeduncled spherical gall of 

 Cecidomyia s. batalis, Walsh, on ^S*. hitvii/i:^. 9 unknown. As the 

 mother Sawfly must have deposited her egg in this gall after the gall- 

 maker had quit it, or not long before, it is a question if this species can 

 be considered an Inquiline." 



There is very little doubt but this is the same with N'. lutpo-te.rcjtnn 

 % , which only differs in having the legs in part piceous and in being 

 somewhat smaller. 



27. Nematus Hudsonicus, n. sp. 



Black: orbits, mouth, tegulae, anterior angle, venter and legs, except a black 

 line on two posterior pair, white. Length 0.38. Br. wings 0.76 inch. 



9 ■ Antennae less than half as long as body, joints cylindrical, some- 

 what enlarged at tip, third and fourth of equal length ; sutures at sides 

 of ocelli deep; ocelli in a triangular basin ; nasus very slightly emar- 

 ginate; orbits, space about antenna3 and mouth beneath, teguht!, ante- 

 rior angle (a black line in middle) and the venter whitish; the latter 

 with a row of black spots on each side forming an interrupted black 

 line ; seutel large, produced behind to a slightly raised angle ; legs dull 

 white, with the basal upper half of anterior femora, a line down the 

 upper side of posterior femora and tibiae and their tarsi black ; anterior 

 inner spur of tibiae blunt, bifid, inner tooth of claw large. Wings hya- 

 line, stigma and costa brown, emargination of stigma distinct. 



Fort Grood Hope, Mackenzie River, Hudson's Bay Territory, (R. 

 Kennicott.) One 9 . 



28. Nematus sumptus n. sp. 



Black; mouth, orbits and tegulse white, basal half of abdomen, spot on pleu- 

 ra and most part of legs rufous. Length 0.28. B;-. wings 0.(i2 inch. 



% . Body long; head large; mouth below antenufe, the outer orbits 

 extending over the back of head and a narrow inner orbital line inter- 

 rupted opposite ocelli yellow ; nasus emarginate ; tegul;^ and anterior 

 angle whitish ; abdomen chestnut-red, the two apical segments black- 

 ish ; an indistinct, piceous, perpendicular spot on pleura near breast; 

 coxae and trochanters whitish, remainder of legs rutbus, paler before, 

 except the posterior tibiae and tarsi, which are blackish ; hinder tibiae 

 somewhat swelled; inner tooth of claws very obtuse, hardly visible. 

 Wings hyaline, faintly smoky, stigma dark brown. 

 Maine, (A. S. Packard.) One % . 



