LEPIDOPTERA 



661 



the outer one of these extends forward over the eyes to the base of the 

 palpi ; on the fore wings there is a biiff stripe extending from near 

 the base of the inner margin to the apex, and veins R5 to 2d A are 

 Hned with white; the hind wings are black with a central reddish 



Fig. 814. — Celerio lineata. 



band. The larva is extremely variable in color and markings. It 

 feeds on many plants, among which are apple, grape, plimi, and 

 currant. 



The thysbe clear-wing, Hcsmorrhdgia thysbe. — ^There is a group of 

 hawk -moths that have the middle portion of the wings transparent, 

 resembling in this respect the .^geri- 

 idse and certain of the Euchromiidse ; 

 but they are easily recognized as 

 hawk-moths by the form of the 

 body, wings, and antennae. One of 

 the more common of these is the 

 thysbe clear-wing (Fig. 815). The 

 scaled portions of the wings are of a 

 dark reddish brown ; but this species 

 is most easily distinguished from all 

 our other species by a line of scales 

 dividing the discal cell lengthwise 

 and representing the position of the base of vein M. The larva of 

 this species feeds on the different species of Viburnum, the snow-berry, 

 and hawthorn. 



The bumblebee hawk-moth, Hcemorrhdgia diffinis. — This clear- 

 wing appears to be about as common as the preceding, and resembles 

 it somewhat. It lacks, however, the line of scales in the discal cell, 

 and the body is more nearly 3'-ellow in southern specimens. This 

 color probably suggested the name bumblebee hawk-moth, given to 

 this insect nearly one hundred years ago by Smith and Abbott. 

 The larva feeds on the bush honeysuckle (Diervilla) and the snow- 

 berry {Symphoricarpus) . 



Fig. 815. — Hcsmorrhagia thysbe. 



