106 IOWA STUDIES IN NATURAL HISTORY 



have the marked blue shade found in nero. In the synonymy of ocola I 

 follow Godman and Salvin (Biol. 511), who say that they have seen the 

 types of all three synonyms and find them to ' ' show no tangible difference. ' ' 



DOUBTFUL SPECIES AND GENERA 

 Genus POTANTHUS Scudder 

 Potanthus Scud., Syst. Rev. 54, (75), 1872. Type Hesperia 

 omaha Edw. 



1. POTANTHUS OMAHA.. 



Hesperia omaha Edw., Proc. Ent. Soc. Phil, ii, 21, 1863. 



Hesperia mingo Edw., Proc. Ent. Soc. Phil, vi, 207, 1866. 



Potanthus calif ornica Scud., Syst. Eev. 54, (75), 1872. 



Scudder, Butt. New Eng. in, 1861, 1889. 



Potanthus dara Dyar (Kollar?), Bull. 52, U. S. N. M., p. 48, 1902. 



The early literature gives the range of this species as West Virginia, 

 Colorado and California. Edwards places the species next to palaemon in 

 his catalogue (Cat. Diurn. Lep. 48, 1877), and Dyar regards it as the 

 Oriental species, Padraona dara Kollar. It is very difficult to say what it 

 may be from the scanty evidence available. 



2. ATBYTONE KUM8KAKA 



Hesperia conspicua Scud, (not Edw.), Trans. Chi. Acad. Sci. i, 336, 1869. 

 Atrytone TcufnsJcalca Scud., Can. Ent. xix, 45, 1887. 



According to the description this is a true Atrytone which Scudder has 

 mistaken for the female of conspicua. Dr. McDunnough tells me that 

 Scudder 's figure of the male genitalia resembles those of byssus, but it 

 seems to me that the description itself suggests a dark female of hobomolc. 

 The type locality is Dennison, Iowa, but I have never taken anything in 

 western Iowa which might be the species. 



3. THANAOS RUTILIU8 (nomen nudum) 

 Nisoniades rutilius Mead, U. S. Geog. Surv. W. 100th Merid. v, 787, 1875. 

 The reference reads as follows : ' ' One individual, now in Mr. Scudder 's 

 hands for description, was taken June 23, at Turkey Creek Jimetion. ' ' The 

 specimen was probably placed by Scudder with another species. 



Family MEGATHYMIDAE 

 Barnes and McDunnough, Contributions i, number m, 1912, Re- 

 vision of the Megathymidae. 

 Head small, much narrower than the thorax. Palpi rather 

 small, oblique. Antennae moderate; club large, stout and pyri- 

 f orm to more cylindrical with a rudimentary apiculus. Venation 

 much as in the Pamphilinae ; vein 3 of the primaries varying in 



