ART. 15». REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 31 



about twice as long as thick, subpedicellate ; thorax seen from above 

 about twice as long as wide; notauli complete, meeting in tin acute 

 point posteriorly; median lobe of mesonotum, and 

 lateral lobes posteriori}^ along their inner margins, 

 strongly shagreened ; mesopleurae and lower part of 

 pronotum polished; scutellum circular, convex, 

 margined laterally, distinctly, but not very 

 strongly, shagreened; wings hyaline, extending a 

 little beyond the apex of the abdomen; abdo- 

 men about one and one-third times as long and 

 about twice as wide as the thorax, a little less 

 than twice as long as wide, broadly rounded 

 at apex; second tergite at apex a little wider 

 than long; basal fovea well marked but shallow, pj^ 4.-platygastee 

 with a few striae which do not extend posterior apiudis ashmead. ab- 

 to their apices ; space between basal foveae ^°^^^ ^^ "'^^'^• 

 traversed by several longitudinal striae. Black, legs dark brown. 



Type locality. — Richfield Springs, New York. 



Type.— Cat. No. 2305, U.S.N.M. 



Redescribed from the type specimen in the United States National 

 Museum. The head of the type has been lost and all notes made 

 above regarding it have been taken from the original description. 

 If Ashmead was correct in his observations then apTiidis is unique in 

 this group of the genus in having the vertex unsculptured. The 

 species is of a rather peculiar appearance with its long and broad 

 abdomen, quite a rarity in the male sex. 



2. PLATYGASTER AMERICANA (Ashmead). 



Epimeces americanus Ashmead, Can. Ent., vol. 19, 1887, p. 129. 

 Ectadius americanus (Ashmead), Cresson, Synopsis of Hymenoptera, 1887, p. 249. 

 Polymecus americanus (Ashmead), Ashmead, Bull. 45, U. S. Nat. Mub., 1893, 

 p. 279. 



Female. — Length 1.9 mm. Head seen from above about twice as 

 wide as long, seen from in front about the width of the eye wider 

 than high; vertex subacute, with fine wavy striae, shagreened on the 

 sides; ocellar triangle and small area just in front of and to the sides 

 of the ocelli, shagreened; sides of frons covered with fine wavy acicu- 

 lations directed transversely, the aoiculations finer in the middle; 

 face just above insertion of antennae rather finely transversely 

 striate; projection between ])ases of antennae longer than wide, 

 subemarginate at the apex; antennae rather stout; third joint a 

 little longer than wide, a little shorter and considerably narrower than 

 the fourth to which it is closely joined; pedicel about twice as long as 

 wide, slightly longer than the fourth joint and nearly as wide ; fifth and 

 sixth joints about as long and as wide as the fourth, distinctlj'^ longer 



