FIELD BOOK OF INSECTS. 



specimens now and then occur, and have been obtained by 

 breeding from the normal form, to which Say gave the 

 name geminatus. Specimens also sometimes occur in 

 which there are three blue spots in the ocellus, and Mr. 

 Grote gave to this aberrant form the name tripartitus." 

 The ground-color of the wings is light gray but the eye- 

 spots (Plate XXXIX) are set in a pink area; the thorax 

 and front wings are marked with rich brown. The larvae 

 are bluish green with yellowish white lines and granules; 

 the horn is usually blue but sometimes greenish or even 

 pink. They feed on willows, poplars, birches, and wild 

 cherry. The tongue-case of the pupa is not free. Adults 

 fly from May to August. 



Sphinx cerisyi has a wing-expanse of about four inches 

 and the single ocellus on each hind wing consists of a 

 dark spot surrounded by, first, a light ring and, then, a 

 dark one. Its larva feeds on willow. 



Adults of Calasymbolus (also called Paonis) have, on 

 each hind wing, a light dot surrounded by a dark ring. 

 The size and outline of the wings of C. myops are almost 

 exactly those of 5. geminatus but the general color of the 

 front wings is brown and the eye-spots of the hind wings 

 are set in a yellow area. Larvae on wild and cultivated 

 cherry. C. astylus is about like myops in size and general 

 color but the outline of the wings is more even and the 

 front wings have a white streak parallel to their outer 

 margins. Larvag on huckleberry and dangleberry. C. 

 exccBcatus is somewhat larger than geminatus and it has a 

 similar pinkish area on the hind wings but the general 

 color is browner and the outer margins of the front wings 

 are saw-toothed, six or eight teeth to each. Larvae on 

 Rosaceas and a large number of other trees. 



Sphingid larvae are so easily recognized as being Sphin- 

 gids that the following additional notes may be helpful but 

 it should be said that larvae often eat other sorts of leaves 

 also. Larvae of Theretra (Chosrocampa) tersa feed on 

 Bouvardia and buttonwood. Dilophonota ello, on Euphor- 

 bia. Phlegethontius (Protoparce} rustica on Chionanthus 

 and Jasminium; P. cingulata, on morning-glory and 



152 



