LIBYTHEA AND MACROGLOSSA. 173 



middle, the other half way between it and the tip, com- 

 posed of lunate segments intervening between the ner- 

 vures — the inner band somewliat geminate. Posterior 

 wings darker brown, anterior edges margined with a few 

 whitish scales. Head and abdomen brown, except the 

 fifth segment, which is silvery white. Thorax greenish 

 yellow. Tail yellowish, margined with brown. Antennse 

 brown, attenuated, terminal hook small and acute. Legs, 

 under surface of the head and thorax white. Under sur- 

 face of the abdomen steel gray, and of the tail yellowish 

 green. Length 1 1-10 inch. Alar expansion 2 6-10 inches. 

 Several specimens were taken at Poland, Mahoning 

 county, Ohio, eighteen years since; one only has been 

 preserved in my cabinet, and is somewhat impaired by 

 fading and mutilation, still it is sufficiently perfect to 

 allow of correct description. 



The perfect insects were observed flying at midday, and 

 resembled in their habits the lady birds, (Sesia,) from 

 which they differ in having opaque wings. 



Dr. Harris did not embrace this species in his valuable 

 descriptive list of Sphinges of the United States, in the 

 36th volume of the Journal of Science^ and he informs us 

 that it has not been described, but resembles somewhat 

 the 31. zonata of the West Indies, but is larger and differ- 

 ently marked, especially on the anterior wings. It will 

 occupy a place in his arrangement immediately before the 

 genus Sesia under the family Macroglossiadce. 



