74 ENTOMOLOGICAL NEWS [Mar., '22 



The Identity of Neominois ridings! and N. dionysus 

 (Lepidoptera, Satyridae). 



By HENRY SKINNER. 



Ridinc/si was described from four females taken at Burling- 

 ton, Boulder County, Colorado. The types of dionysus were 

 taken in the>,Juniper Mountains; on Motmt Trumbull. This 

 mountain is "sixty miles east of St. George" in southern Utah. 

 N. stretchi Edw. is a synonym of rldingsi and the types were 

 taken in Nevada. AshtarotJi Strecker is a synonym of diony- 

 sus and the type was a female from Arizona. The question is 

 whether we have one or two species represented by these 

 names. 



Scudder in his description of dionysus says it differs from 

 N. ridingsi, to which it is closely allied, by its larger size, its 

 more cinereous tints, and by the much more produced serra- 

 tions of the margins of all the banded markings of the hind 

 wings. None of these characters appear to be differential and 

 I have been unable to find characters that warrant the dividing 

 these two forms into distinct species. There is a difference 

 in size, but it only represents individual difference seen in 

 many species. The males range from 20 mm. (one wing) to 

 25 mm., and the females from 24 mm. to 28 mm. The color 

 varies considerably, but appears to be gradational and not dif- 

 ferential. The serrations of the margins of the bands on the 

 inferior wings are also gradational. The primary wings are 

 identical in all the specimens I have examined. The series in 

 the collection of the Academy of Natural Sciences of Philadel- 

 phia are from Whitehorn anad Glenwood Springs in Colorado: 

 Beaver Canyon, Idaho ; Medicine Bow, Wyoming, and Flag- 

 staff, Arizona. The dates of capture vary from June 23rd to 

 July 24th. Mr. W. H. Edwards gives an interesting account of 

 rldingsi and says it flies from early June and also states that 

 there is a late brood appearing in August and September. 1 

 have not seen any specimens with such late dates of appear- 

 ance. Mr. Scudder says the types of dionysus were taken 

 June 4th and June 7th to 10th. 



David Bruce, who collected extensively in Colorado, states 



