48 U.S. NATIONAL MUSEUM BULLETIN 2 89 



segment ringed with white. Labial palpi of male and female relatively 

 short, slightly dimorphic; length of second segment in male about 

 three-fourths that of female; maculation similar between sexes, outer 

 surfaces fuscous with slight irroration of white; inner surfaces paler 

 with more white scales present; apex of third segment white. 



Thorax: Anterior portion of dorsum fuscous w^th an irregular, 

 transverse white band across middle, becoming darker again posteri- 

 orally. Ventral surfaces brownish to pale fuscous, strongly irrorated 

 with white. Pro- and mesothoracic legs mostly fuscous, with apices 

 of tibial and tarsal segments distinctly ringed with w^hite; metathoracic 

 legs with tibial and tarsal segments much paler; dorsal margin of 

 tibia with long whitish hairs; tarsal rings obscure. Pattern of fore- 

 wings variable, usually with an approximately ec^ual mixture of whit- 

 ish and grayish fuscous scales; an elongate, crescent-shaped patch of 

 white at apex of discal cell; center of cell frequently with a circular 

 ring of dark scales enclosing a smaller dark spot; base of wing with 

 dark transverse band distinct; fresh specimens typically with three 

 or four pale, yellowish spots distributed over wing w^hich tend to 

 become faded with age; one patch often present at base of wing along 

 outer edge of transverse band, another at raised scale tuft situated 

 near basal third of costa, and a third usually intermixed with whitish 

 patch at cell apex. Hindwings uniformly gray; veins 3 and 4 separate. 



Abdomen: Grayish to pale fuscous above and along sides, mostly 

 whitish beneath. 



Male genitalia (fig. 65). — Uncus relatively prominent, forming 

 a broad lobe. Tegumen reduced to a narrow, ringlike band dorsally. 

 Transtilla well developed, with a median, conical process projecting 

 posteriorally. Apex of valvae broadly bilobed; cucuUus ending in a 

 small, apical tubercule; lobe of sacculus terminating in a more acute 

 projection. Vinculum Y-shaped, tapering to form a moderately long 

 and narrow saccus. Aedeagus relatively slender, of approximately 

 uniform diameter throughout its length; apex with an obliquely 

 curved, densely clustered row of stout spines, which increase in 

 length toward base of aedeagus; inception of ejaculatory duct slightly 

 above middle. 



Female genitalia (figs. 84, 102). — Ovipositor relatively short; 

 posterior apophyses only sUghtly longer than anterior pair. Lamella 

 antevaginalis roughly quandrangular, with lateral margins parallel; 

 anterior margin somewhat oblic[uely rounded; posterior margin bi- 

 lobed, lobes moderate in length and of equal size. Upper (posterior) 

 third of ductus bursae entirely membranous, antrum terminating in 

 a broad, sigmoid curve; posterior two-thirds with a scattering of 

 papillae. Corpus bursae relatively narrow and elongate. Origin of 



