NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 517 



31. Forewings almost as dark as hindwings, mottled with dark patches, never 



pale grayish white or whitish yellow; cucullus of harpe elongate and slender, 

 with dorsal and ventral margins sublinear and subparallel, apex of cucullus 

 with dorsal portion developed further distad than ventral portion (fig. 

 206) ; aedeagus very slender, sickle-shaped, curving through angle of ap- 

 proximately 90 degrees (fig. 207) ; vesica arising from approximate apical 

 four-fifths of aedeagus (fig. 207). [See couplet 52 for species-group rela- 

 tionship] 45. seculatus, new species 



Forewings dark to light in color; cucullus of harpe partly (fig. 148) or en- 

 tirely unlike above; aedeagus not exceedingly slender, sublinear (fig. 146) 

 or with curvature much less than 90 degrees (fig. 136) ; vesica arising only 

 from apical portion of aedeagus (figs. 136, 146) 32 



32. Cucullus of harpe curving somewhat ventrad; apex of cucullus expanded, 



emarginate, with dorsal portion developed further distad than ventral 

 portion (fig. 135); vesica of aedeagus armed at apex with single, large 

 cornutus (figs. 136, 137) . . 29. pyramellus (Barnes and McDunnough) 

 Cucullus of harpe not as above (figs. 144, 145, 147, 148, 149); vesica of 

 aedeagus unarmed (fig. 146) ; (laticapitanus) 33 



33. Each antennal segment with 2 complete rings of scales; forewings pale 



whitish yellow; cucullus of harpe shaped as in figs. 144 or 145. 



30a. laticapitanus laticapitanus (Walsingham), new combination 



Each antennal segment with only 1 complete ring of scales; forewings pale 



yellow to dark; cucullus of harpe shaped as above or as in figures 147, 148, 



or 149 34 



34. Forewings grayish white or dark; cucullus of harpe with dorsal portion of 



apex considerably reduced and ventral portion correspondingly produced 



distad (figs. 144, 145, 147) 35 



Forewings pale yellow; cucullus of harpe with dorsal portion of apex 

 developed further distad than ventral portion (figs. 148, 149) ... .36 



35. Larger, wings mostly 20-24 mm. in expanse; but little contrast in ground 



color between dark forewings and hindwings; cucullus of harpe with 

 ventral margin concave (figs. 144, 145). 



30b. laticapitanus occidens Busck, new combination 

 Smaller, wings 17-20 mm. in expanse; grayish white ground color of fore- 

 wings contrasting with dark hindwings; cucullus of harpe with ventral 

 margin convex (fig. 147). 



30c. laticapitanus occidens form leopardus Busck, new combination 



36. Cucullus of harpe rather slender, sublinear, with dorsal and ventral margins 



subparallel, with apex subtruncate (fig. 148). 



30d. laticapitanus heinrichi, new subspecies 



Cucullus of harpe broadly and unevenly expanded, with apex broadly and 



unevenly rounded (fig. 149) . 30e. laticapitanus clarkei, new subspecies 



37. Uncus obviously bifid, with furcae well separated (figs. 87, 94, 155, 161). 



38 



Uncus simple (fig. 208), uncal process bifid only at apical extremity (fig. 



189), or uncus obscurely bifid and with furcae very closely appressed (figs. 



167, 180) 41 



38. Antennae strongly bipectinate or strongly unipectinate; (macrogaster-baldufi 



species group, in part). [See couplet 16 for relationship] 39 



Antennae simple, laminate, with segments laterally flattened 40 



39. Antennae strongly bipectinate. 



15b. macrogaster bipectinicornus, new subspecies 

 Antennae strongly unipectinate 16. baldufi, new species 



