654 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



tennae reduced bipectinate, ochreous, covered dorsad with scales; 

 each segmental process (fig. 185) somewhat emarginate mesad m 

 transverse section, developed strongly laterad into pair of secondary 

 processes narrowly rounded at apices, quite slender in lateral aspect, 

 free of scales but covered with elongate setae. Forewings with color 

 pattern somewhat variable, ground color pale brown, marked with 

 dark brown or fuscous ; markings consisting of short bars along costa, 

 distinct spot at outer end of cell, and suffused patch extending from 

 fold to center of posterior margin. Hindwings brown, fringes brown- 

 ish white. Abdomen pale brown, covered with broad scales very 

 densely overlaid with elongate hairs. Wing expanse: 25 to 26 mm. 



Male genitalia. — The foregoing description of the genitalia of 

 sinclairi sinclairi will largely suffice for those of sinclairi nelsoni. In 

 the latter subspecies, the vinculum is broader and more like the 

 typical form exhibited by the majority of acrolophids, the harpe and 

 the arm of the transtilla (fig. 184) present a somewhat different shape 

 in lateral aspect, and a minute angle of bifurcation may be observed in 

 the apical fourth or fifth of the main uncal process. The other genital 

 structures of sinclairi sinclairi and sinclairi nelsoni exhibit only 

 minor differences between these two subspecies. 



Female.- — Coloration similar to that of cf . Labial palpi as in cf 

 except somewhat shorter. Eyes essentially same as those of cf, rath- 

 er weakly lashed. Antennae missing (broken off just above bases). 

 Wing expanse: 28 mm. 



Type. — Holotype cf and allotype 9 in the Illinois State Natural 

 History Survey. 



Paratypes (3 cfcf). — Illinois State Natural History Survey 

 (2 cf cf); United States National Museum (1 cf). 



Type locality. — Las Vegas, San Miguel Co., N. Mex. (no date, 

 Andreas Bolter collection). 



Distribution.— Southwestern United States, New Mexico. 



Specimens examined. — 5 (4 cf cf , 1 9), from one locality: 



New Mexico: Las Vegas, San Miguel Co., 4 cf cT, ? (no date, two cf cf with- 

 out abdomens, Andreas Bolter collection). 



Remarks. — This subspecies is quite rare in collections. With its 

 companion subspecies, sinclairi sinclairi, it forms the complex species, 

 sinclairi. The latter is closely related to persimplex and jervidus, 

 forming with them a species group. This group has been character- 

 ized in the foregoing remarks on jervidus. 



A. sinclairi nelsoni may be separated from sinclairi sinclairi, as has 

 been described in the foregoing remarks on the latter subspecies, 

 chiefly on the basis of differences in antennal structure. In each of 

 these two subspecies, the characteristic type of antenna is consistently 

 exhibited by my series of specimens. Both subspecies present about 



