110 MALE GENITALIA OF NORTH AMERICAN HESPERIIDAE 



sketches were made directly from these as they lay under the 

 cover glass. There is distortion of course, but, as the general 

 shape and the relationship of the parts in life is well known, we 

 beheve this to be the best method for this group. Only the 

 chitinous parts were outlined and hairs and other vestiture are 

 omitted. 



In regard to the classification followed, we are frankly op- 

 posed to the splitting up of the older blanket genera, believing 

 that substantial scientific characters only should be used in such 

 separations, and that the utilitarian value of the generic name 

 should not be lost sight of. We have followed Lindsey in many 

 of his conclusions, but prefer to retain for the present the older 

 conception of the genus Eudamus, and unite Achalarus, Thoryhes, 

 Cogia and PhoecUnus under the oldest name, Cogia, for while in 

 some instances the genitalic characters in the species tend to 

 confirm his conclusions, in other cases the reverse is true, and 

 we are of the opinion that male secondary characters, such as 

 the costal fold and wing and tibial tufts, have specific value 

 only. 



We have thirty-seven species attributed to our fauna, of which 

 three are doubtful and eight are Central American species with 

 a single record of capture over the border. 



Fig. 1. Ajnjrrothrix araxer, arizonae. Mount Gnduuii, Arizona. 



