130 PROCEEDINGS OF THE NATIONAL MUSEUM. 



TETRASTICHUS POLYNEMAE Ashmead. 



This is a species of Aprostocetus. The body bears the usual sculp- 

 ture. The original description is about correct. Club with a distinct 

 terminal nipple, its first joint slightly longer than wide. Pedicel 

 slightly longer than wide at apex ; f unicle 1 longest, over twice longer 

 than wide, 3 somewhat shorter, distinctly longer than the pedicel. 

 Flagellum with scattered, longish hairs. Marginal fringes of the 

 forewing somewhat longer than usual. Propodeum with rather scaly 

 sculpture, a median carina and apparently no others. Mandibles 

 tridentate. 



From the type female in the United States National Museum (the 

 head mounted on a slide). 



OOTETRASTICHUS MYMAKIDIS, new species. 



Female. — Length, 1.10 mm. 



Of the same size, form, and color as the preceding but differing 

 specifically as follows: The legs are white except proximal three- 

 fourths of the coxae and the tarsi, the latter dusky black; the third 

 tooth of the mandible is broadly, obliquely truncate ; the venation is 

 dusky; the sculpture finer, the scutum subglabrous; propodeum scaly, 

 with a pair of diverging median carinae which diverge distad, no 

 lateral carina ; club usual for the genus, with but a very obscure ter- 

 minal nipple; first ringjoint large, the others equal; pedicel sub- 

 elongate, twice longer than wide at apex, longer than f unicle 1, which 

 is two-thirds longer than wide; f unicle 3 somewhat shorter, barely 

 longer than club 1; pedicel wholly brown like the rest of the fla- 

 gellum. 



Described from one female labeled " Tetrastichus polynemae Ash- 

 mead. Type— No. 5323, U.S.N.M., 8694°4. From egg of Lestes, 

 Lake Forest, Illinois, August 4, 1899." 



Thus part of the type of the other species. 



Type.— Qui. No. i9616, U.S.N.M., the above female plus a slide 

 with the head. 



EUPELMUS ALBOCINCTUS Ashmead (Tetrastichini). 



The f unicle is 4- jointed, the club 3-jointed, one ring-joint. Scape 

 and pedicel pale except the latter above. Coxae and base of femora 

 rather broadly black. Stigmal vein of normal length. Scutum with 

 a median groove. Antennae, legs (except coxae), and over proximal 

 third of abdomen in the male, white; the male funicle 3-jointed. In 

 the female, funicle 4 is longest, about a half longer than wide, 1 some- 

 what longer than wide, someAvhat shorter than the not long pedicel. 

 Scape compressed. Mandibles tridentate. Abdomen rounded. Pro- 



