16 



IOWA STUDIES IN NATURAL HISTORY 



Fig. 1. Apyrrothrix araxes 



Hew. a. Club of antenna, b. 



Neuration 



ously so in the female. According to 

 Watson veins 7 and 8 of the primaries 

 of variicolor are short stalked, while in 

 araxes they are free. Watson 's figure of 

 the neuration of his genus differs in a 

 few points in the secondaries also, and on 

 the whole the relationship seems to be 

 rather with the typical species of Pyrr- 

 hopyge than with araxes. Fig.l. 

 Type: Erycides araxes Hew. 



1. APYRROTHRIX ARAXES 



Erycides araxes Hewitson, Desc. Hesp. 2, 1867. 

 Pyrrhopyga eyrillus Plotz, Stett. ent. Zeit, XL, 



529, 1879. 

 Biologia Cent.-Am., Rhop. n , 252, pi. 73, ff 14, 



15, 16, 1893. 

 Holland, Butterfly Book 319, pi. xlv, f. 9, 



1898. 



Mexico. I have two bred specimens 

 from southern Arizona which are very 



close to araxes but the typical form is not known to occur north 

 of the boundary. 



la. race ARIZONAE 



Pyrrhopyge araxes, form arizonae G. & S., Biol. Cent.-Am., Rhop. n, 253, 



1893. 

 Skinner, Trans. Am. Ent. Soc. xxxvn, 201, pi. x, 1911. 



Dark marks on under surface of secondaries not well defined, suffused 

 with ochreous. Outer margin of ochreous area diffuse. 



Arizonae occurs in Arizona in August and September. 



Subfamily HESPERIINAE 

 Structure very diverse but always showing the characters 

 mentioned in the key. Antennae varying in length, club flat- 

 tened oval to extremely long and slender, with the distal half 

 or less reflexed or recurved. Palpi with the second joint closely 

 appressed and the third minute to long, large and porrect. Neu- 

 ration fairly constant. Branches of radius variable in position. 

 Vein 5 straight and about intermediate between 4 and 6, 2 varia- 

 ble. Secondaries with position of 7 variable and vein 5 absent 

 to weakly tubular at its outer end (Thanaos, some specimens), 



