236 



U. S. NATIONAL MUSEUM BULLETIN 216 



Polysphincta takewakii Uchida, 1927, Ins. Matsumurana, vol. 1, p. 172; d\ 9 • 



New synonymy. Types: 2c?, 3? , Toyama, Honshu, Japan (Sapporo). 

 Biology: Nielsen, 1937, Entomologiske Meddelelser, vol. 20, pp. 25-27. 



Front wing of male 3.3 to 4.4 mm. long, of female 3.2 to 5.8 mm. 

 long; front femur and nearly always also middle femur of female with 

 a blunt median tooth beneath; hind femur about 4.8 as long as deep in 

 male, about 5.3 as long as deep in female. 



Black. Scape and pedicel partly or entirely white or pale brown- 

 ish in front; mouth parts, tegula, subtegular ridge, and hind corner 

 of pronotum white; front and middle coxae and all trochanters ivory, 

 or in specimens from Europe and northern North America often 

 stramineous; hind part of pronotum, mesoscutum except for median 

 stripe, scutellum, and mesopleurum partly or entirely fulvous in 

 many North American specimens, particularly in larger specimens 

 and from southern part of the range; front and middle legs beyond 

 trochanters ivory to light fulvous, the last segment of their tarsi 

 largely dark brown; hind coxa ivory or fulvous, sometimes blackish 

 basally; hind femur fulvous, its apex and usually a stripe on upper 

 margin white; hind tibia white, with rather narrow infuscate subbasal 

 band and its apical 0.25 fuscous; hind tarsus stramineous, brownish 

 apically, the apex of each segment dark brown. 



Figure 99. — Localities for 

 Acrodadyla quadrisculpta. 



One specimen ( 9 , Fish Creek, Douglas Island, Alaska, Aug. 6, 1958, 

 W. C. Frohne) is peculiar in having the fulvous color of the hind coxa 

 and femur replaced by black and the normal infuscate markings on the 

 legs unusually dark. 



The one cocoon at hand is fusiform but square in cross section, with 

 four prominent longitudinal corners, papery in texture, and of a 

 light brown color. Meconium is partially pushed through a hole at 

 the hind end, and in the front end an irregular hole has been made by 

 the emerging adult. 



