18 U.S. NATIONAL MUSEUM BULLETIN 2 89 



gnathos slender, greatly elongated, nearly equaling length of valvae, 

 with apex slightly swollen and bearing a dense cluster of short hairs 

 arising from an apical pit. Valvae with a stout, slightly curved ampulla 

 arising near middle from apex of sacculus; cucullus broad at base, 

 tapering to an acute, uncinate apex. Aedeagus with three dense rows 

 of cornuti of about equal lengths and a single, more basal oval patch 

 of short cornuti. 



Female genitalia (figs. 74, 92). — Ostium and antrum extremely 

 broad, nearly as wide as seventh segment; lamella antevaginalis with 

 a single, median lobe. Antrum thickened, densely papillose; remainder 

 of ductus bursae narrow, with two broad bands of thickened papillae 

 extending and converging towaid corpus. Corpus bursae abruptly 

 enlarged, with two, strongly furcate signa; each branch of signum 

 relatively broad, stout. Inception of ductus seminalis at caudal end of 

 ductus bursae near termination of antrum. 



Type. — Lectotype, cf , (C. ottawana) designated by Klots (1942), in 

 the American Museum of Natural History. Lectotype, d^, (C. nichol- 

 sana, present designation), Nicholson, Pa., A. E. Lister, VII-4-1904, 

 USNM 69757 ; in the United States National Museum. 



Type-locality. — Ottawa, Canada, (lectotype, C. ottawana) ; Nichol- 

 son, Pa. (lectotype, C. nicholsana). 



Host. — Cornaceae: "reared from fruit of Cornus paniculata [=C. 

 racemosa Lam.]; Saxifragaceae : Gooseberry [Ribes sp.]," (from speci- 

 men labels) . 



Distribution (map 1). — This subspecies ranges rather widely over 

 much of the eastern United States and southern Canada. It has been 

 most commonly encountered along the eastern edge of the Interior 

 Plains and through the southern half of the Appalachian Highlands. 

 The nominal subspecies, C. niponensis niponensis Walsingham, occurs 

 throughout Japan and Korea and over much of eastern China and 

 Manchuria (see Anonymous, 1958). 



Discussion. — Several problems persist involving this subspecies 

 w^hich emphasize the need for information presently not available. 

 Morphologically C. niponensis ottawana is very similar to the typical 

 subspecies. The two forms have been found to differ only in the 

 relative development of the lamella antevaginalis of the female 

 (see figs. 91 and 92) with the posterior margin of the North American 

 subs])ecies being more attenuated. Unfortunately only a single 

 population of C. n. niponensis was available for study; thus it is not 

 known how great a variation the lamella exhibits in this subspecies 

 over its entire range. Six females from Yokohama all demonstrated 

 a rather uniform, slightly curved posterior margin; ten females of 

 C. n. ottawana, sampled over much of its known range, displayed 

 slightly more variation but all could be readily distinguished from the 



