276 BRUES. 



carina of abdomen sharply defined. Femora, especially the hind ones, 

 very strongly clavate. Wings with a well developed marginal fringe 

 apically, especially near the lower outer angle; disc with very minute 

 hairs, almost bare, except on apical third of wing where the hairs are 

 large and strong; basal third also somewhat more noticeably furnished 

 with minute hairs. Hind wing with two frenulum hooks. 



Type and a number of paratypes from Kartabo, British Guiana 

 (W. M. Wheeler). 



This species is not very abundantly represented in the collection; 

 a careful sorting has disclosed only about thirty specimens. 



Platygaster tubulosa sp. nov. 



9 . Length to tip of third abdominal segment 1.0-1.2 mm. Black; 

 scape of antennae yellowish brown basally; coxse, thickened portions 

 of femora and of middle and hind tibife piceous; trochanters and 

 anterior tibiae pale yellow; tarsi pale, with the last joint infuscated; 

 wings hyaline^ third segment of abdomen brown, the apical ones not 

 always extruded, hyaline, with the tips brownish. Head rather flat, 

 more than twice as broad as long when seen from above ; ocelli rather 

 large, the lateral ones almost as far from the eye-margin as from the 

 median one; vertex and occiput finely shagreened; front shining, 

 practically smooth; malar space nearly half as long as the eye-width, 

 smooth, as is also the head behind the eyes. Antennae apparently 

 9-jointed, but really with ten joints, counting the small joint just 

 beyond the pedicel; scape considerably more than half as long as the 

 remaining joints together, slender, much narrowed basally; pedicel 

 one half longer than thick; first flagellar joint almost as long as the 

 pedicel, with a short, indistinctly separated ring-joint attached to its 

 base; second and third joints slightly shorter, about quadrate; re- 

 maining four joints forming a slightly thickened, but not very distinct 

 club, the joints of which are slightly longer than wide. Mesonotum 

 with finely impressed, but complete and distinct parapsidal furrows, 

 shining, clothed with sparse appressed hairs. Scutellum large, con- 

 vex, longer than wide and gently sloping downwards behind, its base 

 without fovese and separated only by a thin, shallow impressed line. 

 Propodeum with a strongly raised longitudinal ridge toward each side, 

 enclosing a deep cjuadrate median impression. Pro- and mesopleurse 

 shining, faintly punctate; metapleura thinly pale pubescent. Abdo- 

 men elongate, lanceolate; first segment broader than long, coarsely 

 longitudinally striated; second segment three times as long as broad 



