274 LEPIDOPTERA. 



larva ; b, pupa) is gray ; the fore-wings are immaculate at the 

 base, and on the hind wings are two distinct angulated bands. 

 The larva feeds on the tomato and potato vines. It is dark 

 green, with a series of greenish yellow angular bands on the 

 side. The tongue-case is long and much arched. M. Carolina 

 Linn, is cinereous, with a white spot at the base of the fore- 

 wing, while the central band of the hind wings are indistinct. 



The larva (Fig. 200) 

 feeds on the tobacco 

 and tomato. It is dark 

 green with lateral, 

 oblique, white bands, 

 edged above with blu- 

 ish and short trans- 

 rig. 200. i i T 



verse black stripes. 



The tongue-case is shorter and less curved than in M. 5-macu- 

 lata. The tongue of a Madagascar hawk-moth, M. duentius, 

 Wallace states, is nine and a quarter inches long, probably 

 adapted for exploring the long nectaries of some Orchids. 



In Ceratomia the body is thick, with the head and eyes small ; 

 the thorax is short and round, while the abdomen is rather 

 long. The larva is easily known by the 

 four thoracic horns, besides the usual 

 caudal horn. The tongue-case is not 

 free. C. Amyntor Hiibner (quadricornis 

 Harris) feeds on the elm. 



We now come to the more aberrant 

 forms of the family. Under the name 

 of Cressonia Mr. Grote has separated 

 Fig. 201. from the genus Smerinthus, a species in 



which the wings are more notched than in the latter genus, and 

 the antennae are slightly pectinated. Cressonia juglandis Smith 

 (Fig. 201, venation) is of a pale fawn-color, and has no eye-like 

 spots on the hind wings, as in Smerinthus. The larva is bluish 

 green, with a row of subdorsal and stigmatal reddish brown 

 spots, and six oblique, lateral, bright yellow bands. It lives on 

 the wild cherry. 



In Smerinthus the body is stout, the head sunken and the 

 maxillae are only as long as the palpi, being almost obsolete. 



