MOTHS OF FAMILY WALSHIIDAE — HODGES 293 



W. particornella is sufficiently distinct to allow me to propose a new 

 genus for it, I am not really satisfied to place it in either Periploca 

 or Walshla, and I do not think that Walshia and Periploca should 

 be synonymized; therefore, my alternative is the arbitrary one of re- 

 taining particornella in Walshia. 



A season of collecting on the southern part of the Colorado Plateau 

 (Coconino Plateau) showed the following distributional information: 

 no specimens of Perimede or Ithome were taken, less than 20 speci- 

 mens of Periploca were collected, and one species of Walshia, W. 

 miscecolorella, commonly was collected. With the exception of 

 Stilbosis tesquella and Aeaea stipator, new species, which were taken 

 in areas that are tongues of the Sonoran Desert extending onto the 

 southern edge of the Cococino Plateau, none of the species treated in 

 this paper were collected during the same period. The conclusion 

 can be drawn, therefore, that the family is restricted to a warmer 

 climate than is present in the Flagstaff area. Further collecting must 

 be done before any generalized statement on the distribution of the 

 family can be made. 



Key to the North American Genera of Walshiidae 



1. Raised scales present on fore wing 2 



No raised scales on forewing 7 



2. Hind wing with 6 and 7 stalked or connate 4 



Hind wing with 6 and 7 separate 3 



3. Uncus stout, heavily sclerotized (fig. 17) .... Nepotula, new genus 

 Uncus slight, lightly sclerotized Walshia Clemens (in part) 



4. Valvae reduced, patches of modified scales on eighth sternum (figs. 25 and 



25b) Chrysopeleia Chambers 



Valvae not reduced, no modified scales on eighth sternum 5 



5. Saccular margin of male genitalia heavily sclerotized. . Stilbosis Clemens 

 Saccular margin of male genitalia not heavily sclerotized 6 



6. Uncus reduced, appearing as a small lobe, juxta(?) present, aedeagus reduced 



(fig. 20) Sorhagenia Spuler 



Uncus normal, long; juxta absent; aedeagus moderate to large (fig. 30). 



Aeaea Chambers 



7. Glandular structures associated with male genitaUa . . Perimede Chambers 

 No glandular structures associated with male genitalia 8 



8. Uncus present 10 



Uncus absent 9 



9. Valvae reduced, eighth segment of abdomen with lateral valva-Uke extensions 



(fig. 18) Obithoine, new genus 



Valvae not reduced, no valva-like processes on eighth abdominal segment. 



Periploca Braun 



10. Hind wing with 6 and 7 stalked 11 



Hind wing with 6 and 7 separate Walshia Clemens (in part) 



11. Uncus heavily sclerotized, somewhat off center (fig. 19). 



Neoploca, new genus 

 Uncus moderately sclerotized, arising from center of margin of tegumen . 12 



