422 U. S. NATIONAL MUSEUM BULLETIN 216 



2a. Megarhyssa greenei greenei Viereck 



Figures 318,d; 319,b 



Megarhyssa greenei Viereck, 1911, Proc. U. S. Nat. Mus., vol. 40, p. 191; 9 (d" 

 misdetermined) . Type: 9 , Harrisburg, Pa. (Washington). 



Biology: Procter, 1938, Biological survey of the Mount Desert region, vol. 6, 

 p. 406.— Fattig, 1949, Ent. News, vol. 40, pp. 70-71. 



Morphology: Pratt, 1939, Ann. Ent. Soc. America, vol. 32, p. 737. 



Male: Light fulvous brown. Head mostly yellow, with a dark 

 brown band between tops of eyes (enclosing ocelli) and the hind part 

 of head mostly fulvous; mandible black except basally; scape and 

 pedicel brown above; flagellum brown, paler below; hind edge of 

 pronotum, anterolateral margin of mesoscutum, front and hind mar- 

 gins of mesopleurum and mesosternum, area surrounding subtegular 

 ridge, front and hind margins of metapleurum, and apex of propodeum, 

 blackish or dark brown; propleurum except dorsally, wide upper 

 margin of pronotum, more or less of anteroventral and hind margins 

 of pronotum, inner and outer edges of lateral lobe of mesoscutum, 

 scutellum, postscutellum, an irregular submarginal band around meso- 

 pleurum, hind part of metapleurum, and apicolateral part of propo- 

 deum, pale yellow; front and middle legs pale fulvous or their tibiae 

 and tarsi largely yellowish, the front coxa in front, more or less of 

 middle coxa basolaterally, front and middle trochanters, and femora 

 in front, with a variable amount of pale yellow; hind coxa basodorsally 

 and apex of hind femur pale yellow; postero ventral part of hind coxa 

 usually brownish; extreme apex of first tergite, base of third tergite, 

 and base, apex, and side of second tergite dark brown; first two or 

 three tergites with a short preapical yellowish band; third through 

 sixth tergites usually brownish medially; wings hyaline, the apex of 

 front wing faintly infuscate. 



Female: Head, thorax, and legs colored as in the male; abdomen 

 light fulvous brown, the tergites darker brown near apex and each 

 tergite with a yellow subapical band that parallels its apical margin, 

 the bands on the third and following tergites interrupted on the mid- 

 line; wings with a faint yellowish-brown tinge, the apex of front wing 

 faintly infuscate and the front wing usually with a large brown spot 

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



Female specimens from the Canadian zone usually lack the brown 

 spot in the front wing. Those from the colder parts of the Transition 

 zone may or may not have the spot or may have it weakly developed. 

 Females from more southern zones always have the spot. 



Specimens (245 cf, 2619): From Alabama (Coosa River in Chilton 

 Co.); Connecticut (Colebrook); Delaware (New Castle Co.); District 

 of Columbia (Rock Creek Park); Georgia (Atlanta and Burton at 

 1,800 ft.); Illinois (Chicago, Edgewood, Moline, and Riverside); 



