SKINNER AND "WILLIAMS 287 



The females which we have agree with the description; the 

 males associated with them agree in the markings below, but 

 usually hav'e more white markings above. We have not, how- 

 ever, a male that just agrees with Lindsey's figure.*" 



The genitalia are more like those of syrichtus than those of any 

 other American species. The tegumen is similar, ending in two 

 ]irojections; the scaphium with rather heavier serrations; the 

 valve has a recurved hook at its apex, and in addition near and 

 on the dorsal part numerous stout spines directed backward; 

 the aedoeagus is simple. 



Records: Texas, San Antonio; Arizona, Mt. Graham (IMor- 

 rison), Baboquivari Mts., Pima County, July (Poling). 



7. Hesperia syrichtus Fabricius (Fig. 6.) 



Godmau and Salvin, Biol. Cent. Amer., Rhop., in, pi. 90, fig. 27, (1899). 

 Reverdiu, Bull., Soc. Lep. Geneve, iv, pi. 5, figs. 1 (form a), 2 (form b), 

 o (form c) and 4, 5, G (valvae enlarged), (1919). 



This spcK'ies has both costal fold and tibial tuft. 



Dr. J. L. ]|everdin, in the paper referred to above (p. 9() and 

 1()7), has published the results of his careful study of this species, 

 ])r(^sented excellent figures of the insect prepared by the artist 

 ( 'olot, photographic reproductions of the male genitalia of three 

 forms, text figures showing variation in the aedoeagus, and 

 extensive observations on the forms of the s])(H'ies and its geo- 

 grai)hic distribution. 



The typical form of syricJitus is ashen, or black and white on 

 the secondaries below, while the form inontivagus Reakirt 

 (fumoaa lleverdin) is decidedly suffused with brown. Both 

 forms occur in Central America, Mexico and the Antilles. We 

 have the typical form from Texas, proving its occurrence in our 

 fauna, but the prevailing form above the Mexican border and 

 in Florida is montivagus. 



The terminal of the uncus is cleft; the scaphium consists of 

 two arms shagreened at their turned up terminals and con- 

 nected together with an arch from their bases; the valve has a 

 rounded apex, the dorsal edge produced backward in a curve the 

 outer portion of which is strongly dentate; the aedoeagus is 

 provided with some teeth at the apex varying in luimhcr and 

 shape. 



1" Univ. of Iowa Studies in Nat. Hist., ix, pi. i, fig. 7, (1921). 



TU.\NS. AM. KNT. SOC, XLVIU. 



