90 IOWA STUDIES IN NATURAL HISTORY 



7. Primaries with a transverse row of fulvous spots arpa 9 



With diffuse pale fulvous areas arogos $ 



8. Veins black 9 



Veins not black arogos 



9. Wings usually broadly yellow-fulvous with a terminal fuscous band 



above; immaculate yellow or brownish yellow below logan 



Wings with the fulvous definitely limited; under surface of second- 

 aries in most specimens with a faint pale transverse band, never clear 

 yellow byssus 



1. ATRYTONE AROGOS 



Papilio vitellius A. & S., (not Fab.), Lep. Ins. Ga. 1, 33, pi. xvii, 1797. 

 Hesperia arogos Boisd. & Lee, Lep. Am. Sept. pi. 76, ff. 3, 4, 5, 1833. 

 Hesperia iowa Scud., Proe. Bost. Soc. Nat. Hist, xi, 401, 1868. 

 Hesperia mutius Plotz, Stett. ent. Zeit. xliv, 199, 1883. 

 Atrytone vitellius Holland (not Fab.), Butterfly Book 364, pi. xlvi, f. 

 6, 1898. 



Florida, August and September. Nebraska and Iowa, June and July. 

 Ocean County, N. J., July (Davis). 



The pale tawny wings with their broad, even, fuscous borders distinguish 

 the male; the female is readily associated with the male, but the fuscous 

 is more extensive, encroaching upon the discal area and often almost oblit- 

 erating the tawny color. 



2. ATRYTONE LOGAN.. 



Hesperia logan Edw., Proe. Ent. Soc. Phil. 11, 18, pi. 1, f. 5, 1863. 



Hesperia delaware Edw., op. cit. p. 19, pi. 5, f. 2. 



Seudder, Butt. New Eng. 11, 1614, 1889. 



Biol. Cent.-Am., Rhop. 11, 490, pi. 94, ff. 4-6, 1900. 



Holland, Butterfly Book 365, pi. xlvi, f. 24, 25, 1898. 



Florida to Texas, north to Montana and Illinois; July and August. 



2a. race LAGUS 

 Pamphila lagus Edw., Trans. Am. Ent. Soc. ix, 5, 1881. 



I regard this as scarcely worth separating from logan. It is the western 

 race, and in extreme forms has the fuscous terminal borders reduced to 

 very slender lines and the under surface very pale. 



3. ATRYTONE BYSSUS 

 ? Hesperia bulenta Bd. & Lee, Lep. Am. Sept. pi. 67, ff. 1-5, 1833. 

 Pamphila byssus Edw., Can. Ent. xn, 224, 1880. 

 Holland, Butterfly Book 358, pi. xlvi, f. 20, 1898. 



Florida, August. Skinner includes Texas (Cat. p. 89). 



Dr. McDunnough places bulenta tentatively as a synonym of byssus. 

 The figure is a striking thing, unlike any known species of North America, 

 but it does bear a remote resemblance to this species. 



