NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 515 



Harpe broad, with base of cucullus broad and indistinctly merging with 

 costa and saccuhis (figs. 83, 85) ; forewing with prominent, irregular, white 

 patch in basal half; (macrogaster, in part). [See couplet 38 for species-group 



relationship] 17 



17. Antennae bipectinate, with pectinations wider at bases than outwardly. 



15a. macrogaster macrogaster (Walsinghara), new combination 



Antennae unipectinate or laminate 18 



IS. Antennae unipectinate; process of each antennal segment not laterally flat- 

 tened, separated from adjacent process by space at least equal to its own 



thickness 15c. macrogaster unipectinicorniis, new subspecies 



Antennae simple, laminate; process of each antennal segment laterally 

 flattened, separated from adjacent process by narrow space much less than 

 its own thickness . . . 15d. macrogaster laminicornus, new subspecies 



19. Sacculus of harpe with ventrocaudal extremity strongly angulated (fig. 95); 



vesica of aedeagus armed with single row of 10 to 15 minute cornuti (fig. 



97) 17. arizonelhis Walsingham 



Sacculus of harpe with ventrocaudal extremity not angulated (fig. 100) ; 

 vesica of aedeagus unarmed (fig. 101) 18. luriei, new species 



20. Each antennal segment completely encircled by at least one ring of scales; 



mostly smaller species, wing expanse usually less than 21 mm 21 



Each antennal segment clothed only dorsad or dorsolaterad with scales, or 

 antennal segments complex and their processes free of scales; mostly larger 

 species, wing expanse usually greater than 21 mm 37 



21. Eyes obviously setose 22 



Eyes naked or very sparsely and obscurely scattered with exceedingly minute 



setae 26 



22. Eyes rather sparsely clothed with recumbent or partially recurved setae; 



rings of antennal scales small, widely separated, directed considerably 

 outward and resembling small funnels; forewings with small patches of up- 

 raised scales; uncus with single process minutely and acutely bifid at 

 extreme apex (figs. 105, 106); vesica of aedeagus unarmed (figs. 104, 107, 



111) ; {cressoni-maadifer-crescentellns species group) 23 



Eyes rather densely clothed with erect setae; rings of antennal scales large, 

 narrowly separated or overlapping, not funnel-shaped; forewings without 

 patches of upraised scales; uncus bifid (figs. 116, 117, 121); vesica of aede- 

 agus armed with cornuti (figs. 114, 115, 119, 120); (piger-vanduzeei species 

 group) 25 



23. Cucullus of harpe broadest in central portion, with apical portion narrowed 



(fig. 102); aedeagus curving through angle of approximately 180 degrees 

 (fig. 103), with apex acute in lateral aspect (figs. 103, 104). 



19. maculifer (Walsingham) 



Cucullus of harpe not broadest in central portion, with apical portion slightly 



expanded and broadly rounded (figs. 108, 109, 110); aedeagus curving 



through angle of approximately 90 degrees or less, with apex narrowly 



rounded in lateral aspect (figs. 107, 111) 24 



24. Cucullus of harpe linear or sublinear (figs. 108, 109) ; aedeagus curving through 



angle of approximately 90 degrees, with base expanded ventrad into large 

 flaplike process curving back upon itself (fig. 107). 



20. cressoni (Walsingham) 



Cucullus of harpe with major apical portion curving considerably dorsad 



(fig. 110); aedeagus with major central portion sublinear and with only 



basal and apical extremities somewhat curved, with base not expanded 



into flaplike process (fig. HI) 21. crescentellus (Kearfott) 



