THE STUDY OF INSECTS. 



338 



wings are black with a central reddish band. The larva is 

 extremely variable in color and markings. It feeds on many 

 plants, among which are apple, grape, plum, and currant. 



FIG. n\*,.Deilephila h 



The Thysbe Clear-wing, Hemaris thysbe (He-ma'ris 

 thys'be). There is a group of Hawk-moths that have the 

 middle portion of the wings transparent, resembling in 

 this respect the Sesiidae and certain Zygaenids; but they 

 are easily recognized as Hawk- 

 moths by the form of the 

 body, wings, and antennas. 

 One of the more common of 

 these is the Thysbe Clear- 

 wing (Fig. 416). The scaled 

 portions of the wings are of a 

 dark reddish brown ; but this 

 species is most easily distin- 

 guished from our other common species by a line of scales 

 dividing the discal cell lengthwise and representing the po- 

 sition of the base of vein V. The larva of this species feeds 

 on the different species of Viburnum, the snowberry, and 

 hawthorn. 



The Bumblebee Hawk-moth, Hemaris diffinis (He-ma'ris 

 dif-fi'nis). This Clear-wing appears to be about as common 



