112 



My specimen of Mastigocera vespina differs, according to your 

 description, from yours, in being cyaneous where yours is black. 

 It is, however, the same. I received my specimen from Dr. 

 Hornbeck of the West Indies. But unless I should be much 

 mistaken, we have also a species of this genus in our country, 

 and we have captured it twice, but it was each time destroyed 

 during its preparation for the cabinet. I was much puzzled to 

 place it appropriately, on account of the peculiar form of the 

 antenna?, which are, however, not quite so robust as in vespina, 

 and the thickest portion is more toward the middle than in that 

 species. It is deep black and densely pilose. 



My specimen of dEgeria omphale differs somewhat from 

 yours, and more so from Say's figure. 



We raise every summer specimens of Grlaucopis pliolus ; we 

 find its larvaB on the lichens growing on the trunks of hickory 

 trees. 



In all my specimens of Sphinx liylceus, the hind wings are 

 more black than white, and, in many, the white line above the 

 eye and sides of the thorax is wanting. It appears to me that 

 your PJtilampehis Hornbeckiana must be closely allied to, if 

 not the same as, Sphinx fasciata of Sultzer ; vide Abgekiirzte 

 Geschichte der Insecten, I, p. 157, pi. xx, fig. 1. 



I cannot inform you whether the female of Oiketicus is 

 winged or not, but I am fully convinced that we never raised a 

 female, or a specimen, different in the antennaa from that in 

 your possession. The following is an accurate and correct 

 description of the larva, transcribed from my entomological 

 diary : 



" Head small, entirely withdrawn when the larva reposes ; 

 body oblong, quadrate, above longitudinally subconcave, very 

 densely clothed with yellow ferruginous, sometimes reddish 

 brown hairs ; vesture very short and even ; upper portion of 

 each side dilated, and with six appendages, those on the anal, 

 middle, and third segments, longer than the others ; all the 

 appendages clothed as the body, fringed at the edges, and re- 



