76 IOWA STUDIES IN NATURAL HISTORY 



Key to the species 



1. Spots of primaries shaply defined, often hyaline or subhyaline 2 



Spots more or less ill defined, never hyaline 3 



2. Expanse over one inch; fulvous spots restricted snowi 



Less than one inch; fulvous of secondaries a diffused discal patch 

 milo, agricola 



3. Large; wings pale, tawny, with a little fuscous along the outer mar- 

 gin yv/tna 



Smaller ; wings not broadly tawny 4 



4. Under surface of secondaries with a variably distinct pale transverse 



band ; ground color not pure pale yellowish sylvanoides, napa 



Under surface without a pale band, yellow nemorum, pratmcola 



1. AUGIADES SYLVANOIDES 



Eesperia sylvanoides Boisd., Ann. Soc. Ent. France (2), x, 313, 1852. 

 2 Eesperia pratimcola Boisd., Ann. Soc. Ent. France (2), x, 315, 1852. 

 Hesperia agricola Plotz, (not Boisd.), Stett, ent. Zeit. xijv, 219, 1883. 

 Eesperia francisca Plotz, Stett. ent. Zeit. xliv, 220, 1883. 

 Wright, Butt. W. Coast 243, pi. xxxi, ff. 430, c, 432, 433, b, c, 1905. 

 Oberthiir, Etudes ix, (1), pi. CCXL, ff. 2083, 2084, 2089, 1913. 



California, Oregon, Washington, British Columbia; June to August. 



la. race NAPA 

 Eesperia napa Edwards, Proe. Ent. Soc. Phil, iv, 202, pi. i, ff. 3, 4, 1864. 



Colorado, August. 



This is practically the same in appearance as sylvanoides but is larger 

 and the under surface of the secondaries is less variable. 



2. AUGIADES NEMORUM 



Eesperia nemorum Boisd., Ann. Soc. Ent. France (2), x, 314, 1852. 

 PampMla verus Edw., Trans. Am. Ent. Soc. ix, 4, 1881. 

 Wright, Butt. W. Coast, pi. xxxi, ff. 430b, 431, 431c?, 1905, 

 Oberthiir, Etudes ix, (1), pi. ccxl, f. 2086, 1913 (type). 



California, June. 



2a. race PBATINCOLA 

 Eesperia pratincola Boisd., Ann. Soc. Ent. France (2), x, 315, 1852. 

 Oberthiir, Etudes ix, (1), pi. ccxl, f. 2088, 1913 (type). 



I follow Barnes and McDunnough's Check List in placing this form. 

 The insect is not represented in the Barnes collection, but Oberthiir 's ex- 

 cellent figure looks like a specimen of nemorum with the fuscous marginal 

 areas of the upper surface greatly reduced. 



3. AUGIADES AGRICOLA 



Eesperia agricola Boisd., Ann. Soc. Ent. France (2), x, 314, 1852. 

 Eesperia yreka Edw., Proc. Ent. Soc. Phil, vi, 207, 1866. 

 Pamphila milo Edw., Can. Ent. xv, 34, 1883. 



