Sphingidae 
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. thetis. 
The species is not uncommon in Colorado and Utah. 
SUBFAMILY PH1LAMPELINAE 
Genus PHOLUS Hubner 
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 Vitacece , 
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 III, Fig. 
6 , $ . 
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 *md 
Pig. 27. —-Larva of Pholus satellitia pan¬ 
dorus; a, mature larva; b, larva after third 
molt, head retracted; c, young larva. (After 
Riley.) 
