390 U. S. NATIONAL MUSEUM BULLETIN 216 paet 3 



ments 2-4 of hind tarsus white ; segment 5 of hind tarsus black ; wings 

 subhyaKne. 



Female: Front wing 6.4 to 9.1 mm. long; clypeus wealdy convex, its 

 apical 0.3 impressed; cheek about 0.80 as long as basal width of man- 

 dible; metapleurum with dense, small, strong punctures partly ob- 

 scured with dense, irregular, oblique wrinkling; propodeal teeth about 

 0.63 as long as their basal width; apical carina of propodeum absent, 

 or sometimes partly traceable between the teeth; intercubitus about 

 3.0 as long as width of radial vein. 



Head and thorax black, the clypeus and tegula usually dark ferru- 

 ginous, the propodeal teeth dusky whitish as in figure 333, a; palpi 

 ferruginous; antenna black, brownish basally, with an incomplete white 

 band that covers about 6 segments; legs ferruginous, the fifth tarsal 

 segments brownish; wings dark brown; abdomen ferruginous. 



Specimens (26 cf, 399): From Florida (Bratt in Escambia Co. and 

 Crescent City); Louisiana (Delta, Opelousas, and Shriever in Terre- 

 bonne Co.); Mississippi (Benoit); North Carolina (Faison and Wake 

 Co.); South Carolina (Clemson College, Columbia, and Greenville); 

 Texas (Blanco Co., Cypress Mill, Fort Sam Houston, Gillespie Co., 

 Houston, Kerrville, Laguna Madre 25 miles southwest of Harlingen, 

 Lake Buchanan in Llano Co., Lee Co., Leon Creek in Bexar Co., 

 Marathon, 16 miles south of Marathon, New Braunfels, St. Tomas 

 near Brownsville, Salado Creek in Bexar Co., San Antonio, Victoria, 

 and Willow City); and Mexico (Villa Santiago in Nuevo Leon at 

 1,500 ft.). 



Dates of collection are from mid-spring to early fall. In Texas the 

 species appears to become common early in April and to disappear in 

 mid-summer. There are no Texas records after July 17. For other 

 areas August and September dates of collection are common. Un- 

 usually early and late dates of interest are: January 1, March 23, and 

 April 4 at Salado Creek, Bexar Co., Tex.; March 27 at Laguna Madre, 

 25 miles southwest of Harlingen, Tex.; April 3 at Fort Sam Houston, 

 Tex.; May 8 in Wake County, N.C.; September 29 in Wake Co., N.C.; 

 and October 8 at Greenville, S.C. 



We have found the species among unshaded grasses and low herbage, 

 usually at the edges of fields or roadsides. 



This species occurs mostly in the Austroriparian fauna. 



7. Diapetimorpha acadia Cushman 



Diapetimorpha acadia Cushman, 1929, Proc. U.S. Nat. Mus., vol. 74, art. 16, p. 

 SSjcf, 9. Type: 9, Louisiana (Washington). 



Male: Front wing 4.0 to 5.2 mm. long; clypeus moderately convex; 

 cheek about 0.75 as long as basal width of mandible; tyloids in the 

 form of a thin, sharp carina on six segments, extending the full length 



