SphingidsB 



scales upon the thorax and the basal segments of the abdomen, 

 and the fact that the anal tuft is wholly black, not divided by 

 yellow scales in the middle as is the case in H. theft's. 

 The species is not uncommon in Colorado and Utah. 



SUBFAMILY PHILAMPELIN/E 

 Genus PHOLUS Hiibner 



This is a large genus, including nineteen species, and a num- 

 ber of subspecies. It is confined to the Western Hemisphere. 

 Six species occur 

 within our territory. 

 P. typhon Klug, which 

 we have not figured, 

 is occasionally found 

 in Arizona. The larvae 

 feed upon the Vitacex, 

 and in the case of two 

 of the species have 

 done at times some 

 damage to vineyards. 



(i) Pholus satel- 

 litia Linnaeus. (The 

 Satellite Sphinx.) 



Form pandorus 

 Hubner, Plate 111, Fig. 

 6, 3. 



Syn. ampelophaga 

 Walker. 



This insect which 

 is widely distributed 

 throughout the eastern 

 United States, and 

 ranges northward into 

 southern Canada, i s 

 well-known to all 

 growers of vines. The 

 caterpillar, when it 

 first emerges from 

 the egg and for several successive molts is green in color, and 



Fig. 27. — Larva of Pholus satellitia pan- 

 dorus; a, mature larva; b, larva after third 

 molt, head retracted; c, young larva. (After 

 Riley.) 



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