288 MALE GENITALIA OF NORTH AMERICAN HESPERIIDAE 



Record: near Corpus Christi, southern Texas (Aaron). 



There is a third form or perhaps a distinct species (syrichtides 

 Reverdin), also occurring in Central America, Mexico and the 

 Antilles, which is very like the typical form in color and macu- 

 lation l)ut which differs genitalically in the shape of the valve, 

 in that the terminal rounded end is not extended so far back- 

 wards, but ends in a more substantial projection shaped like the 

 toe of a slipper, and the aedoeagus is provided with a single 

 stout tooth at its terminal. This form or species, however, does 

 not seem to enter the United States. 



a. form montivagus Reakirt 



This was originally described from "Rocky Mountains, 

 Colorado Territory" and is the prevailing form above the 

 Mexican line. 



The genitalia are the same as those of typical syrichtus. 



Records: Colorado; Florida, Key West (Morrison); South- 

 ern Arizona (Poling). 



8. Hesperia tessellata Scudder (Fig. 7.) 



Scudder, Butterflies East. U. S. and Can., iii, pi. .35, fig. 39 (valve), 40 (uncus) 



(as montivagus), (1889). 

 Reverdin, Bull. Soc. Lep. Geneve, iv, pi. 7, fig. 1 (typical) and 4-8 (details 



and aberrant formations), (1921). 



This species has the costal fold but lacks the tibial tuft. 



Reverdin in the paper referred to above (pp. 168-181), has 

 presented lithographic figures of the insect by Colot (Plate 6, 

 figs. 9, 10, 11, 12, 15), sketches of the variation in the valve 

 (p. 177), and published the results of his careful study of its 

 genitalic variation and geographic distribution, from the exam- 

 ination of a large number of specimens. 



He concludes that it is a widely spread species, subject to 

 considerable variation in its habitat from Surinam, through 

 Central America, Mexico and throughout the United States, 

 and within these limits divides the species into three classes; 

 first those with a large toothed protuberance at the end of the 

 valve; second, intermediate forms; and third, those which are 

 without this protuberance and teeth. The first class roughlj^ 

 covers the territory to the east and north of the United States; 

 the second, the States adjoining the Mexican boundary and well 



