518 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



40. Eyes heavily setose, each with prominent anterior tuft of lashes. 



31. arcanellus (Clemens) 

 Eyes naked, without prominent tufts of lashes 32. moms (Grote) 



41. Eastern species: Atlantic States; small, wing expanse rarely greater than 



18 mm 42 



Western species: Texas and westward; medium to large, wng expanse rarely 

 less than 18 mm 43 



42. Eyes sparsely setose; cucullus of harpe with apical portion broadly and 



evenly expanded, capitate (fig. 162); uncus simple; vesica of aedeagus 

 armed with 15 to 20 small cornuti (fig. 163) . . 33. forbesi, new species 

 Eyes naked; cucullus of harpe with apical portion only very shghtly expanded, 

 not capitate (fig. 164) ; uncus with apical portion very obscurely bifid 

 (fig. 167) ; vesica of aedeagus unarmed (fig. 165) . . 34. panamae Busck 



43. Antennae strongly bipectinate, processes of each segment with separate 



origins 44 



Antennae simple to complex, but never as above 45 



44. Labial palpi rather short, barely extending onto anterior margin of thorax; 



uncal process short and relatively robust, curving strongly ventrad; cucul- 

 lus comprising less than apical half of harpe, with pronounced ventral 

 constriction at base (fig. 168); aedeagus markedly asymmetrical, distinc- 

 tive (figs. 169, 170); anellus armed with large, pouchlike juxta (fig. 171). 



35. juxta tus, new species 

 Labial palpi of intermediate length, noticeably extending onto anterior 

 margin of thorax; uncal process elongate and relatively slender, curving 

 only slightly ventrad; cucullus comprising at least apical half of harpe, 

 without ventral constriction at base (fig. 172); aedeagus asymmetrical, 

 but entirely unlike that of above (figs. 173, 174); anellus unarmed, or with 

 only faint trace of juxta 36. chiricahuae, new species 



45. Cucullus of harpe very broadly expanded in lateral aspect (figs. 175, 177, 



182, 184) ; {persimplex-fervidus-sinclairi species group) 46 



Cucullus of harpe not broadly expanded in lateral aspect (figs. 186, 193, 

 196, 199) 49 



46. Forewings with major portions pale, with ground color whitish ochreous 



overlaid with stripes and shadings of bright reddish brown scales; cucullus 

 of harpe markedly narrowed dorsad near base, with apex correspondingly 

 expanded dorsad (fig. 175) ; aedeagus with apex produced into prominent, 



recurved process (fig. 176) 37. fervidus Busck 



Forewings not brightly and contrastingly colored as above, with ground 

 color considerably darker; cucullus of harpe not appreciably narrowed 

 dorsad near base, with apex only shghtly expanded dorsad (figs. 177, 182, 

 184) ; aedeagus with apex not produced as above (figs. 179, 183) ... 47 



47. Antennae transitional between laminate and unipectinate, with segmental 



processes subglobose and considerably reduced, each process armed at apex 

 with minute spine directed toward apex of antenna; fore wing heavily suffused 

 with fuscous merging into prominent fuscous patch in center of posterior 

 margin; cucullus of harpe with central portion not appreciably narrowed 

 ventrad (fig. 177), ental surface of cucullus armed with prominent clasper 



(fig. 178) 38. persimplex (Dyar) 



Antennae unipectinate or reduced bipectinate, with segmental processes 

 not as above; forewing not heavily suffused with fuscous, without fuscous 

 patch in center of posterior margin; cucullus of harpe with central portion 

 considerably narrowed ventrad (figs. 182, 184), ental surface of cucullus 

 without clasper {sindairi, new species) 48 



