562 U. S. NATIONAL MUSEUM BULLETIN 216 



sized punctures that are separated by about 0.6 their diameter; second 

 segment of hind tarsus about 4.0 as long as deep in male, about 3.1 

 as long as deep in female; ovipositor sheath about 1.25 as long as 

 front wing. 



Black. Face, frontal orbit, cheek, temple (for its entire width at and 

 below the middle, for part of its width above), clypeus, labrum, basal 

 0.6 of mandible, palpi, lower side of antenna of male, part of lower side 

 of scape and pedicel of female, apical 0.35 of male flagellum except 

 extreme tip, broad subapical band on female flagellum, sometimes 

 spot on propleurum, most of anteroventral and upper margins of 

 pronotum, tegula, subtegular ridge, transversely quadrate spot below 

 subtegular tubercle, longitudinal band near lower margin of mesoster- 

 num, often a marginal stripe on lower side of sternaulus, mesepimeron, 

 large elliptical area on metapleurum, V-shaped submarginal mark on 

 sides and rear of median lobe of mesoscutum, mesal and lateral edges 

 of lateral lobe of mesoscutum, scutellum, postscutellum and metano- 

 tum adjacent to postscutellum, hind 0.4 ± of propodeum, short 

 median basal stripe on first tergite, apical bands on first through sixth 

 tergites (margined apically with blackish on first tergite of male and 

 first and second tergite of female, the apical band on female sixth 

 tergite interrupted medially) , and seventh and eighth tergites laterally, 

 ivory; front and middle legs ivory, their coxae blackish at base and 

 their femora mostly brownish behind in female and sometimes in 

 male; hind leg ivory, its coxa except for a large ventral and usually a 

 smaller dorsal area and its femur except at apex and often at base, 

 black; hind tibia infuscate beyond basal 0.4, in the male ivory below 

 for its entire length; female subgenital plate infuscate, most of its 

 dorsal edge whitish; wings hyaline, the front wing with a broadly 

 crescent-shaped infuscate area on its apex. 



Specimens (144 cf, 2589): From Connecticut (East Haddam, East 

 Hartford, East River, Litchfield, Lyme, "Massor," North Stonington, 

 Storrs, and Voluntown) ; Iowa (Clinton) ; Maine (Augusta, Bar Harbor, 

 and Capens); Maryland (Bowie, Cabin John, College Park, Glen 

 Echo, Laurel, Plummers Island, and Sycamore Island) ; Massachusetts 

 (Amherst, Dorchester, Lexington, Maiden, Norwell, Petersham, 

 Savoy, Stony Brook Reserve near Boston, and Wollaston) ; Michigan 

 (Ann Arbor, Benzie Co., Calhoun Co., Cheboygan Co., Deerfield 

 Township in Lapeer Co., Detroit, Douglas Lake in Cheboygan Co., 

 East Lansing, Gogebic Co., Gull Lake Biological Station in Kalamazoo 

 Co., High Island in Charlevoix Co., Macomb Co., Manistee Co., 

 Marquette Co., Midland Co., Oakland Co., Otsego Co., Saginaw Co., 

 Shiawassee Co., Warren Woods in Berrien Co., and Whitefish Point in 

 Chippewa Co.) ; Minnesota (Alexandria and Fillmore Co.) ; New 

 Hampshire (Crawford Notch, Durham, Fitzwilliam, Franconia Notch, 



