58 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



Type locality. — Jacksonville, Florida. 



Type. — The type of melanocera is lost. 



Type of gracilis.— C^t. No.24603, U.S.N.M. 



Redescribed from the male determined by Ashmead and described 

 by him in his Monograph (p. 289). I have been unable to find the 

 female type in the collection but the original description makes it 

 clear that the type was a female. The shape of the abdomen is the 

 distinguishing character of the species, being remarkably narrow, 

 and convex above and below. Platygaster gracilis Ashmead I can- 

 not seperate from this species. The legs and tegulae are slightly 

 darker and the seventh joint of the antennae is distinctly emarginate 

 below on basal half. This latter character I believe to be an aber- 

 ration and color characters are too unstable to be of any value. The 

 last joint of one antenna and the last six joints of the other are lost 

 from the type of gracilis. Otherwise it is in good condition. 



25. PLATYGASTER DIPLOSIDIS (Ashmead). 



Polygnotus diplosidis Ashmead, Bull. 45, U S. Nat. Mus., 1893, p. 306. — Brues, 

 Bull. 22, Conn. Geol. Nat. Hist Surv., 1916 (1917), p. 540. 



Polygnotus pinicola Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 307. — Brues, 

 Bull. 22, Conn. Geol. Nat. Hist. Surv., 1916 (1917), p. 539. 



Female. — Length 1.2 mm. Body rather short and stout; head 

 seen from above a little over twice as wide as long, flattened behind, 

 convex in front; occiput aciculate; cheeks behind finely shagreened; 

 vertex transversely striate, with a transverse median carmae, finely 

 shagreened laterally ; ocellar triangle and extreme upper part of face 

 on sides faintly shagreened, the rest of the face finely aciculate, not 

 striate anywhere; antennae stout; flagellum shorter than the th*orax, 

 gradually incrassated toward tip; scape short, slightly curved basally, 

 not much thickened before the apex, about as long as the next five 

 joints united, as wide as any of the last four joints; pedicel distinctly 

 less than twice as long as wide, narrowed but not curved proximally, 

 as wide apically as the sixth, a little longer than the seventh; third 

 and fourth joints equal in length and width, as long as wide, closely 

 joined, much narrower than, and half as long as, the second; five 

 about as wide but a litte longer than four, about as long as but 

 narrower than six; six a little narrower and shorter than seven, 

 eight or nine which are subequal in width and length, each as long 

 as wide ; ten longer than the pedicel, nearly as wide as nine, one and 

 one-half times as long as wide, blunt apically; thorax very short, 

 strongly convex above, as wide as high, less than one and one-half 

 times as long as wide seen from above, as wide as the head; prono- 

 tum finely aciculate to shagreened (except medially above and a 

 narrow line posteriorly on the sides where it is polished) ; longitudinal 

 ridges not well defined, the median area therefore not definitely 

 bounded, faintly shagreened; mesonotum strongly convex, separated 



