NORTH AJVIERICAN ACROLOPHIDAE — HASBROUCK 623 



30b. Acrolophus laticapitanus occidens Busck, new combination 



Figures 144r-146 



Acrolophus occidens Busck, 1910, Proc. Ent. Soc. Washington, vol. 11, no. 4, 

 p. 186, Jan.; 1912, Rep. Laguua Marine Lab., vol. 1, p. 168. — Barnes & McDun- 

 nough, 1917, Check List Lep. Bor. Amer., p. 191, no. 8165. — McDunnough, 

 1939, Check List Lep. Can. & U.S. Amer., p. 103, no. 9551. 



Acrolophus flavicomus Busck, 1912, Rep. Laguna Marine Lab., voL 1, pp. 168-169, 

 May. — Barnes & McDunnough, 1917, Check List Lep. Bor. Amer., p. 191, 

 no. 8161. — McDunnough, 1939, Check List Lep. Can. & U.S. Amer., p. 103, 

 no. 9547. (New synonymy.) 



Eulepiste (?) occidens Barnes & McDunnough, 1913, Can. Ent., vol. 45, no. 12, 

 p. 420. 



Busck's original description of occidens follows: 



Acrolophus occidens — Male. — Labial palpi curved, ascending, reaching vertex; 

 first joint as long as second and third together, with evenly rounded brush; second 

 joint also with a brush, continued shghtly up over the equally long, smooth third 

 joint. The form of the palpi is intermediate between those described for the 

 genera Eulepiste and Neolophus Walsingham. The scales of palpi, head, and 

 thorax are brownish fuscous tipped with white. Antennae ochreous fuscous. 

 Fore wings grayish ochreous, overlaid with black, brown, and white scales. There 

 is an oblique, ill-defined dark shade, edged with white, from apical fourth of 

 costa to the middle of dorsum, nearly parallel with the terminal edge; on the 

 apical fourth of the wing are four or five small black dots and outside of these 

 the wing is strongly overlaid with white scales. Hind wings dark fuscous; abdo- 

 men dark fuscous, with white bands on the upper side. Legs ochreous, mottled 

 with fuscous and with indistinct black tarsal annulations. 



Alar expanse, 22 mm. 



Habitat — San Diego, California. May. L. E. Ricksecker, coll. Additional 

 specimens are in the collection of Mr. Kearfott. 



Type — No. 12694, U.S. National Museum. 



This species is very close in size, pattern, and form of the palpi to Acrolophus 

 (Eulepiste) kearfotti Dyar, but is much paler, lacks the costal black spots, and has 

 the clear cut oblique dash of kearfotti replaced by the less defined oblique fascia; 

 the abundant white dusting, especially on the apical part, is also lacking in 

 Dr. Dyar's species. All these color differences might, however, be individual in 

 this group, where the color and markings are quite variable, but the claspers of 

 the male genitalia are very different and the two species are undoubtedly amply 

 distinct. 



Male genitalia. — Vinculum typical, but rather short. 



Tegumen typical; glabrous to sparsely and weakly punctate, lateral 

 arm narrowing shghtly toward point of articulation with vinculum; 

 dorsal area rather broad, unseparated, commonly with subtriangular 

 caudal expansion fiUing mesal separation in base of uncus. 



Harpe simple, somewhat variable, considerably constricted ventrad 

 near center. Lateral aspect: costa and sacculus fused, sparsely and 

 weakly punctate, comprising slightly more than basal half of harpe, 

 broadest distad of center, narrowing somewhat toward rounded base; 

 cucullus large, broad, with marked ventral constriction near base, 



