SOME MOTHS, GENUS ACLERIS — OBRAZTSOV 



249 



Figure 4. — Acleris klotsi, new species: a, male genitalia (paratype; slide 179-Obr.); b, 

 cornuti (more enlarged); c, female genitalia (allotype). 



an obliterate costal triangle thus formed. Groups of black raised 

 scales easUy falling off: one on first band between discal cell and 

 dorsum, five others along second band. An obliterate ochreous 

 shadow between two external bands, and a similar narrow line parallel 

 to third band, between it and termen. Cilia whitish ochreous with 

 a brownish basal line. Reverse of forewings paler than their upper 

 surface, with brownish-gi'ay dots and short lines matching markings 

 of upper surface. Length of forewing, 7-8 mm. Hind wings white. 



Male genitalia. — Tegumen without cristae; gnathos simple with- 

 out middle spine; socii ovate. Valvae elongate; brachiola indicated 

 by a slight obtuse projection; sacculus rather broad, sinuate; external 

 tuft narrow. Aedoeagus strongly curved; vesica armed with a 

 semiovate plate and two cornuti capitate at base. 



Female genitalia. — Sterigma with very short lateral lobes. An- 

 trum narrow, semilunar, pointing caudad. Ductus bursae rather 

 long, semimembranous and narrow in long cephalic portion, dilated 

 and membranous caudad. Cervix bursae moderate; corpus bursae 

 slightly elongate; signum stellate, scobinate, somewhat elongate. 



Types. — Holotype, male, Ramsay Canyon, Huachuca Mountains, 

 Ariz., July 10-15, 1941 (A. B. Klots); allotype, female (genitalia 

 on slide 180-Obr.), the same data; three male paratypes (genitalia 

 of one on slide 179-Obr.). All types in AMNH. 



Remarks. — In its appearance this new species has no close resem- 

 blance to any Nearctic Acleris species, although it might perhaps 

 remind one of A. britannia Kearfott, in which however the forewing 

 markings are probably never so obliterate. The genitalia are very 



