ART. 15». REVISION^ OF SUBFAMILY PLATYGASTERINAE FOUTS. 39 



Some of the specimens in the paratype series seem to represent 

 other species but the material is not in good condition for study and 

 no attempt has been made to sort out the forms included. No speci- 

 men from St. Louis, Missouri, was found in the collection. 



9. PLATYGASTER FUSCIPENNIS. new species. 



Female. — Length 1.73 mm. Similar in a general manner to stria- 

 ticollis Ashmead. Head twice as wide as long, arouately emarginate 

 behind, wider than the thorax; cheeks flattened, shagreened; anten- 

 nae moderately stout; pedicel a little over twice as long as wide, 

 nearly as long as joints three and four united, as wide as four; three 

 narrower than two, three-fourths the length of four, one and one-half 

 times as long as wide, subequal to five (but not narrowed basally) ; 

 six as long as five but a little wider; seven to nine about as wide as 

 long; ten slightly longer, blunt at tip; mesonotum shagreened; lat- 

 eral lobes on the outside polished; scutelium strongly shagreened, 

 sparsely pubescent; abdomen the length of the first segment longer 

 than the head and thorax united, as wide as the thorax; median area 

 on first tergite a little longer than wide, with a short carina basally; 

 basal foveae on second tergite deep, with a few short striae on their 

 inner margins, the striae not attaining the middle of the segment; a 

 few striae between the foveae; wings brownish, extending three- 

 fourths the length of the second segment past the apex of the abdo- 

 men. Shining black; most of antennae and legs brownish-yellow; 

 joints six to ten of the antenna, hind femora entirely, and tibiae api- 

 cally, tinged with fuscous. 



Type locality. — Glen Echo, Maryland. 



Type.— Cat. No. 25432, U.S.N.M. 



Described from three specimens collected by the author at Glen 

 Echo. Two bear the data " 1917 "and the other " VI-16-1919." I 

 know nothing of the habits of the species. Paratypes in Collection 

 Fonts. 



10. PLATYGASTER STRIATICOLLIS (Ashmead.) 



Polygnotus striaticollis Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 319. 

 Male. — Length 1.2 mm. Head shaped as in laevicollis Ashmead; 

 occiput rugose; vertex rugose laterally, striate medially; ocellar tri- 

 angle with a few fine wavy transversely directed striae, very low, a 

 line drawn from lateral ocellus to lateral ocellus across their top mar- 

 gins touching the posterior edge of the anterior ocellus; face around 

 the ocelli shagreened with striae intermingled, below the upper third 

 of eyes striate, finely medially, becoming coarser toward the anten- 

 nal sockets; projection between antennae shaped as in laevicollis; "the 

 pedicel much longer than the first and second funiclar joints, which 

 are small, the second being wide at apex than long; club 6-jointed, 

 pilose, the joints loosely joined, and all except the last, transverse 

 monili form" ; last joint twice as long as wide, acute at tip; pronotum 

 5596— 24— Proc.N.M.vol.63 21 



