xxxiii, '22] ENTOMOLOGICAL NEWS 75 



that the two exist at the same altitude and cites ridingsi as 

 common near Denver and dionysus as abundant at Glenwood 

 Springs, Colorado. He records both forms from Salida, Colo- 

 rado. He infers that they are two species and that dion\sits 

 is found on sandy and desert tracts and ridingsi is found in 

 the short grass. We have a series of specimens from him, 

 doubtless from Glenwood Springs, but having only "Colorado" 

 on the pins. A series of specimens taken by Prof. A. ]. 

 Snyder in Beaver Canyon, Idaho, July 24, 1895, shows very 



Genitaiia of Neominois ridingsi, male. 



considerable variation and both forms may be picked from this 

 series. The specimen from Flagstaff, Arizona, is a typical 

 ridingsi. The variations in the species do not appear to be due 

 to geographical variation or altitude. 



There are not sufficient data to judge of the brood differ- 

 ences, but the first brood would be likely to be somewhat dif- 

 ferent from a late one. An examination of the genitalia of 

 the males shows no difference. The genitalic figure was made 

 by Mr. E. T. Cresson, Jr. The original description spells the 

 name dionysus (Greek name of Bacchus). The lists spell the 

 name dionysius (the elder Tyrant of Syracuse). The original 

 spelling should be followed. 



