248 THIRTIETH REPORT ON THE STATE MUSEUM. [136] 



after the removal of the eggs and viscera from the female -its 

 weight being twelve grains, and that of the male three grains. 

 Were it not for the capture of a second male at the same time, 

 of the same diminutive size, it might have been supposed that 

 the example was a dwarfed individual. This disproportion in 

 size is the more interesting, from the fact that in a congeneric 

 species Cossus Centerensis, the size affords no indication of 

 sex, for the males of this species are often larger than the 

 females. 



Dr. Fitch has erred in representing the hind wings of the 

 male querciperda as colorless. They are pale yellow on the 

 disc beyond the fold at vein la the color of the delicate scales 

 shoeing more plainly when their surface is viewed in line with 

 the eye. Within vein la to the inner margin, the wing is 

 covered with black hairs. 



The yellow coloring of these wings, together with the angle 

 on vein 1, and the antennal structure, ally this species to 

 C. robinicz. 



