NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 579 



macrogaster, on the basis of differences occurring in the antennae, 

 labial palpi, and eyes. 



15b. Acrolophus macrogaster bipectinicornus, new subspecies 



Female unknown. 



Male. — Similar to macrogaster in habitus and general coloration. 

 Labial palpi intermediate in length, closely appressed, recurved, 

 extending only onto anterior margin of thorax, apical portions 

 diverging slightly from head and from each other distad, basal 

 segment slightly longer than central segment, apical segment con- 

 siderably reduced and less than two-thirds as long as central segment. 

 Eyes rather large and protruding, naked, posterior halves heavily 

 lashed. Antennae strongly bipectinate; pectinations finely setose, 

 narrower at bases than outwardly. Forewings with basal whitish 

 patches almost obsolete. Hindwings pale brown, considerably paler 

 than forewings. Genitalia similar to those of laminicomus with 

 following exceptions : gnathos considerably broader, not cleft at apex; 

 cucullus of harpe and central portion of uncus noticeably broader in 

 lateral aspect. Expanse: 19 mm. A unique cf specimen from 

 Colora'o, New Mexico, at light, July 10, T. D. A. Cockerell. 



Holotype d^, U.S. National Museum, type no. 61437. This sub- 

 species may be distinguished from the others of the macrogaster 

 complex by its combination of bipectinate antennae, from which the 

 name is derived, and shortened labial palpi. 



15c. Acrolophus macrogaster unipecttnicornus, new subspecies 



Figures 83-84 



Female unknown. 



Male. — Similar to macrogaster in habitus and general coloration. 

 Labial palpi elongate, recurved, extending to center of thorax, basal 

 portions closely appressed to head and to each other, apical portions 

 diverging from thorax and from each other distad, basal se^nent 

 shorter than central segment, apical segment elongate and shghtly 

 longer than central segment. Eyes rather small, moderately setose, 

 anterior and posterior portions well lashed. Antennae unipectinate; 

 pectinations subcircular, finely setose, each separated from adjacent 

 process by space at least equal to thickness of process. Ground 

 color of forewings, hindwdngs, and abdomen brown. Abdomen with 

 lateral tufts of whitish scales; tip clothed with elongate, slender, 

 brownish scales. Genitalia, including harpe (fig. 83) and aedeagus 

 (fig. 84), essentially same as those of laminicomus. Expanse: 20-23 

 mm. Four cf cf from Ai'izona. 



Holotype d^, U.S. National Museum, type no. 61438, from Para- 

 dise, Cochise Co., Ariz., July. The three remaining cT cf have been 



