664 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



Remarks. — This species undoubtedly ranges southward into Mexico. 

 It is not closely related to any of the other acrolophids known to occur 

 in America north of Mexico. In general, A. parvipalpus is related to 

 those species having short labial palpi, naked eyes, and laminate 

 antennae covered only dorsad by scales. It may easily be distin- 

 guished from the other members of the genus by its unusually short 

 labial palpi and its oddly shaped harpe. The cucullus of the latter 

 structure in parvipalpus has its major central portion markedly 

 flattened dorsoventrad so as to appear quite slender in lateral aspect. 

 In addition, the costa of the harpe is produced dorsocaudad into a 

 distinct costal process. The genital structure of this species is quite 

 consistent throughout my series of specimens. The name, parvi- 

 palpus, refers to the considerably reduced labial palpi exhibited by 

 this species. 



43. Acrolophus davisellus Beutenmiiller 



Figures 199-201 



Acrolophus davisellus Beutenmiiller, 1887, Ent. Amer., vol. 3, no. 7, p. 139, Oct. — 

 Smith, 1891, List Lep. Bor. Amer., p. 95, no. 5058. — Barnes & McDunnoiigh, 

 1917, Check List Lep. Bor. Amer., p. 191, no. 8193.— McDunnough, 1939, 

 Check List Lep. Can. & U.S. Amer., p. 104, no. 9583. 



Pseudanaphora davisellus Dyar, 1900, Can. Ent., vol. 32, no. 10, p. 310; 1900, 

 Can. Ent., vol. 32, no. 11, p. 327; 1903, List North Amer. Lep., p. 579, no. 

 6601.— Barnes & McDunnough, 1913, Can. Ent., vol. 45, no. 12, p. 421. 



BeutenmiiUer's original description follows: 



Acrolophus Davisellus — Head and thorax, fuscous, mixed with grayish scales, 

 labial palpi short, ascending, but not recurved over the head and thorax, deep 

 brown outside, and ochreous inside. Primaries, fuscous, irregularly mottled 

 with deep broviTi patches, forming a sub-lunate dash, running from the disc 

 nearly to the apex, and another patch on the fold about the middle of the wing, 

 below which there is a dirty white space running along the middle third of the 

 internal margin, other dirty white scales scattered over the wings, cilia brown, 

 with pale spots. Secondaries and cilia fuscous. Expanse of wings c?, 28 mm. 9 , 

 unknown. 1 cf , Arizona. 



The species is allied to A. arcanella, Clem. Named in honor of my friend 

 Wm. T. Davis of Staten Island, N.Y., an earnest and closely observing ento- 

 mologist. 



Male genitalia. — Vinculum rather large and well sclerotized, 

 otherwise typical. 



Tegumen of medium width, glabrous; lateral arm gradually nar- 

 rowing to point of articulation with vinculum, margins rather heavily 

 sclerotized, caudal margin wealdy sinuate; dorsal area with cephalic 

 margin concave, caudal margin convex and indistinctly fusing with 

 base of uncus. 



