624 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



sparsely punctate and setose ectad and entad, eui'ving gradually 

 mesad toward apex, broadest distad of center, narrowing dorsad 

 toward apex, apical portion curving somewhat ventrad and approxi- 

 mately half as broad as central portion, ventral margin emargiuate 

 and commonly sinuate, dorsal margin markedly expanded near center, 

 apex evenly and rather broadly rounded. 



Transtilla with arm of medium length and width, glabrous, sub- 

 parallel with and rather broadly separated from dorsal margin of 

 costa, terminating subacutely near base of harpe. 



Uncus simple. Dorsal aspect: base reduced, separated along 

 meson, separated from tegumen by areas of reduced sclerotization, 

 sparsely punctate and setose, laterobasal margins rounded, lateral 

 margins converging distad into uncal process; uncal process fused 

 with base, elongate, tubular, slender, sparsely setose, curving slightly 

 ventrad toward apex, gradually narrowing to acute apex. 



Gnathos fused, rather elongate and narrow, directed ventro- 

 caudad; dorsal surface concave, with apical third rugose; lateral 

 margins parallel, well sclerotized; apex broadly and evenly rounded 

 and wdth small, weakly sclerotized, ventral lobe or flap. 



Anellus membranous, unarmed, juxta absent. 



Aedeagus of medium length, rather slender, cylindrical, glabrous, 

 asymmetrical, sublinear to weakly sinuate in all aspects, broadest in 

 basal portion, gradually and evenly narro\ving to central portion, 

 center about half as wide as base, apical half of constant width; 

 apex slightly expanded and with small, irregular opening. 



Vesica small, membranous, unarmed. 



Remarks. — The holotype cf and a shde of the cf genitalia of a 

 paratype were examined at the U.S. National Museum. In compari- 

 son to the material I had previously seen, the holotype exhibited a 

 moderate amount of intraspecific variation in regard to the structure 

 of the cucullus and the wing pattern, but there was no question as to 

 its identity. I have seen only the cf cf of occidens. These include 

 16 specimens from San Diego County, Cahf. One was taken at 

 Alpine in July 1912 by Geo. H. Field, while the remaining 15 were 

 collected in San Diego by Geo. H. Field and W. S. Wright on the 

 following dates: May 2, 1908; May 6, 16, 22, and June 4, 1911; 

 June 12 and 14, 1912; May 3 and June 4 and 14, 1913. Most of these 

 dates of occurrence for occidens are earlier than those of its form, 

 leopardus, discussed below. Since occidens exhibits essentially the 

 same genitaha as, but is geographically separated from, latica'pitanus, 

 it should be considered a subspecies of the latter on the basis of the 

 external differences described above. 



