THE HOG SPHINX. 



Mexico, and a nearly related species is found in the Eastern 

 Hemisphere. The larva feeds on grape, Epilobium, and 

 other plants. 



This (Plate XXXVIII) may be but a form 

 Pholus sa t e iini af it flies at dusk, and later, 



from June to November. The larva, which 

 feeds on grape and Virginia creeper, is green, when young, 

 and has a long horn, which often curls over its back; 

 but the full-grown larva? are tailless and usually brown. 

 The pupa, with adhering tongue-case, is usually formed 

 underground. It is a widely distributed species with 

 several local races. 



Pholus achemon has a brown general color, the basal 

 three-fourths of the hind wings are pink, and the dark 

 markings on the hind margin of each front wing are re- 

 duced to a rectangular spot near the middle and a smaller, 

 triangular spot near the outer end. Larval and pupal 

 habits like those of pandorus. 



For some reason, or none, this species 

 Ampelophagus ig called Hog Sphinx> p late XXXVIII 



shows a larva bearing on its back the co- 

 coons of an Ichneumonid whose larvae had been feeding 

 on the tissues of the moth's larvae. Such cocoons may be 

 found on many kinds of caterpillars but this species is 

 much afflicted by the parasites. The principal food 

 plants of myron are grape and Virginia creeper. A cocoon 

 is made among fallen leaves. 



A. pliolus is much like myron but the front wings are 

 brownish. Its larva feeds on Virbunum and Azalea. 

 There are two annual broods. 



A . versicolor differs from myron in having a white median- 

 dorsal line and, on the thorax, a pair of white side lines, 

 white markings on the green front wings and a broad, 

 whitish hind-margin of the hind wings. The larvas feed 

 on Hydrangea, Decodon, and buttonball (Cephalanthus). 



149 



