412 U. S. NATIONAL MUSEUM BULLETIN 216 



2. Rhyssella humida (Say) 



Figure 318,b 



Pimpla humida Say, 1836, Boston Journ. Nat. Hist., vol. 1, p. 224 (Leconte ed., 

 vol. 2, p. 683); ?. Type: 9, Indiana (destroyed). 



Front wing of male 5.7 to 7.5 mm. long, of female 8 to 12 mm. long; 

 face with very sparse fine punctures and usually also with more or less 

 distinct, fine, transverse wrinkling on its median part; upper part of 

 pronotum with very sparse, fine punctures; base of first tergite weakly 

 swollen. 



Black. Face of male, orbital stripe on face of female, short broad 

 orbital stripe on frons, scape of male except above, long broad orbital 

 stripe on temple, upper part and lower corner of pronotum, tegula, 

 subtegular ridge, sometimes a median pair of dashes on mesoscutum, 

 apex of scutellum, postscutellum, often a small lateral subapical spot 

 on second tergite, large lateral subapical spot on third through seventh 

 tergites, and band along lateroventral margin of eighth tergite of 

 female, white; metasternum, metapleurum, usually more or less of 

 mesosternum and mesopleurum, and often lateral part of propodeum, 

 fulvous ; propodeum often with a small lateral subapical blotch of white 

 and fulvous; front leg whitish in male, fulvous in female with some 

 paler areas, the narrow apex of its tarsal segments brownish and apical 

 third of its fifth tarsal segment infuscate; middle leg ivory with some 

 fulvous tinges, the coxa of female and femur of female except at apex 

 entirely fulvous, the tibia with a narrow apical and usually a narrow 

 subbasal infuscate band, and the tarsus more or less infuscate toward 

 apex with the apex of each segment a little darker; hind coxa fulvous; 

 hind first trochanter entirely whitish or partly fulvous; hind second 

 trochanter dusky fulvous or infuscate; hind femur fulvous, its apex 

 usually with a narrow infuscation; hind tibia whitish or stramineous, 

 its apical 0.2 to 0.3 fuscous and a subbasal band or area infuscate; 

 hind tarsus whitish or stramineous, more or less infuscate apically, 

 the apex of each segment narrowly fuscous; wings hyaline, the front 

 wing of female sometimes brownish in base of radial cell. Sometimes 

 the tarsi are entirely fuscous except for the basal part of the first 

 segment. 



Specimens (47 cf, 619): From Connecticut (Lyme and New 

 Canaan); Iowa (Ames); Kentucky (Crailhope); Maryland (Bladens- 

 burg, Bowie, near Cumberland, Plummers Island, and Takoma Park); 

 Maine (Dryden) ; Massachusetts (Holliston) ; Michigan (East Lansing, 

 Marquette Co., Mecosta Co., Monroe Co., Onota in Alger Co., and 

 Saginaw Co.); Minnesota (Itasca Park and St. Peter); Mississippi 

 (Nicholson); New Jersey (Fort Lee and Moorestown); New York 



