372 Lejpidojpterological Contributions. 



us our United States L. acraea, with its prominent colorational 

 sexual divergence, which led its first discoverer to describe the 

 sexes under different specific names. To the accustomed 

 secondary sexual characters of Ecpantheria, are added, in the 

 instance of E. leucarctioides, an expression of those of Leu- 

 carctia. The secondary sexual characters are here, however, 

 most strongly expressed by a difference in color and size ; in 

 the Castniid genus Euscirrhopterus, Grote, or, still better, the 

 Psychid genus Psychonoctua, Grote, the structure of the sexes 

 is so dissimilar, or, in other words, the secondary sexual cha- 

 racters are so strong, that we are driven to combine the sexes 

 on superficial instead of particular characters, which latter, 

 however, future investigation may disclose. In Heliocheilus, 

 a Heliothid genus from Colorado Territory, we have another 

 striking instance of the degradation of the neuration into 

 secondary sexual character. Indeed we shall find that any 

 attempt to classify the Lepidoptera throughout, by means of 

 characteristics drawn from a single structural feature, for 

 instance, the antennae or the neuration of the wing, will be 

 attended by failure; for we shall be apt to see the character 

 upon which we placed dependence degraded by its variability 

 in the sexes of a single species, or in genera otherwise too 

 nearly allied to be separated by such an arbitrary method of 

 classification. 



Sdb-Fam. COCHLIDIAE. 



Limacodes, Latreille. 



liimacodes iiiornata, n. s. 



Rather stout. Squamation close and rather heavy; on the 

 primaries slightly transversely waved or creased. Entirely dull 

 pale cinnamon-brown; secondaries, above, a little darker. Body, a 

 little paler than wings. 



Expanse, $ , 0.90 inch. Length of body, 0.35. Exp. ?, 1.00 to 

 1.20 inch. Length of body, 0.40 inch. 



