360 U. S. NATIONAL MUSEUM BULLETIN 216 



somewhat stronger than it is medially; first tergite about 2.1 as long 

 as wide, its dorsal carinae fading out before the spiracles; ovipositor 

 sheath about as long as hind femur. 



Lemon yellow. Top of head, hind legs, tarsi, and apical part of 

 abdomen a little suffused with fulvous; three long stripes on meso- 

 scutum, short narrow stripe above tegula, groove at base of scutellum, 

 band across base of propodeum and in front of propodeal spiracles, 

 last two segments of hind tarsus except beneath, extreme base and 

 broad band on middle of first tergite, and subbasal band on second 

 to sixth tergites (occupying about 0.25 their length), black; front 

 wing with a fuscous spot around tip of radial vein, the wing mem- 

 brane otherwise hyaline. 



Specimens (25 cf, 429): From Alabama (Coleta and Pyriton, both 

 in Clay Co.); Arkansas (Fayetteville) ; Florida (Camp Torreya in 

 Liberty Co., Gainesville, and Manatee); Georgia (Atlanta); Indiana 

 (Clark Co. and Spencer); Louisiana (Tallulah); Maryland (Cabin 

 John, Plummers Island, and Takoma Park); Missouri (Van Buren 

 and Willard); North Carolina (Crestmont in Haywood Co., Flat 

 Rock, Garland, Hamrick, Havelock, Hollis in Rutherford Co., Lum- 

 berton, Murfreesboro, Southern Pines, and Wake Co.) ; Ohio (Carbon- 

 dale, Fairfield Co., Hocking Co., Ross Co., and Scioto Co.) ; Oklahoma 

 (Broken Bow and Flint) ; South Carolina (Calahan Mt. in Greenville 

 Co., Greenville, McClellanville, Spartanburg, Table Rock State Park, 

 and Venus in Greenville Co.); Tennessee (Smoky Mts. and Gatlin- 

 burg) ; Virginia (Falls Church) ; and West Virginia (Cheat Mt. at 2,000 

 ft. in Randolph Co.). 



Dates of collections are from June 5 (at Spartanburg, S. C.) to 

 October 23 (at Plummers Island, Md.), with the addition of one record 

 of March 18 at Gainesville, Fla. The species seems to be commonest 

 in late summer. The fact that it has not been taken in spring or 

 later in the fall may be due only to lack of more collections. We 

 have found the species moderately common in dense deciduous woods, 

 flying about 0.15 to 0.3 meters from the ground, and occasionally 

 alighting on low foliage. In flight it looks like a lemon yellow streak, 

 and is rather conspicuous in the poor light of a dense woods. Some- 

 times it looks deceptively like a small, slender Vespula. 



This species is moderately common in deciduous woods of the 

 Austroriparian and Carolinian faunas. Adults occur mostly from 

 June to September. 



4. Theronia bicincta (Cresson) 



Figure 314,d 



Front wing 7.5 to 11.5 mm. long; apical edge of clypeus concave; 

 prepectal carina obsolete above but a trace of it curving forward 

 toward front edge of mesopleurum; scutellum without lateral carina; 



