424 U. S. NATIONAL MUSEUM BULLETIN 216 



Pennsylvania (Castle Rock in Delaware Co., Corry, Germantown, 

 Harrisburg, Jeannette, Linglestown, Overbrook, Philadelphia, Pitts- 

 burgh, Pottstown, Sharpsburg, Shiremanstown, Spring Brook, Stover- 

 dale in Dauphin Co., and Valley Forge); Quebec (Aylmer, Fort 

 Coulonge, Hemmingford, Joliette, Knowlton, and Sherbrooke); 

 South Carolina (Greenville); Tennessee (Headquarters of Great 

 Smoky Mountains National Park); Virginia (Black Pond in Fairfax 

 Co., Falls Church, Great Falls, and Nelson Co.); Vermont (Jackson- 

 ville and Laurel Lake near Jacksonville); West Virginia (Cheat 

 Mt. at 2,000 ft. in Randolph Co.); and Wisconsin (Door Co., Madison, 

 and Worden Township in Clark Co.). 



Collection dates are from rather early spring to mid-fall, the 

 earliest and latest dates being: May 2 in Delaware Co., Ohio; May 5 

 at Falls Church, Va. ; May 8 at Ithaca, N. Y., and at Harrisburg, Pa. ; 

 September 28 at Ann Arbor, Mich.; October 1 in Delaware Co., 

 Ohio; and October 4 at Linglestown, Pa. 



Rearing records from the above specimens comprise 1 lot reared 

 from Tremex columba in Carya, and 1 lot from Tremex columba in 

 Acer rubrum. Additional rearings specify the kind of wood but not 

 the host insect, including 3 rearings from Carya, 1 from Fagus, and 1 

 from Quercus alba. 



This subspecies is in the Alleghanian and Carolinian faunas. It 

 is a common parasite of Tremex columba in hardwoods. Adults occur 

 throughout the growing season. 



2b. Megarhyssa greenei floridana, new subspecies 



FlGXTBE 319,C 



Male: Unknown. 



Female: Coloration similar to female of M. greenei greenei except 

 that ground color is more reddish brown, yellow markings a little 

 reduced, and wings almost uniformly dark brown. 



Type: 9, in trap, Winter Park, Fla., Apr. 1, 1936, O. D. Link 

 (Washington, USNM 63720). 



Paratypes: 9, in trap, Maitland, Fla., Sept. 9, 1936, O. D. Link 

 (Washington). 9, Orlando, Fla., March 1944, R. and G. Bohart 

 (Townes). 



A specimen from Florence, S. C. (9, Apr. 11, 1930, O. L. Cartwright, 

 Townes collection) is intermediate between this subspecies and 

 typical greenei, the wings being light brown with a darker area in 

 the basal half of radial cell and apex of discocubital cell. 



3. Megarhyssa atrata (Fabricius) 



Male: Front wing 16 to 22 mm. long; cheek about 1.0 as long as 

 apical width of mandible; median part of apical edge of first sternite 



