s PLATE CCCCLXIX. 



forming, according to thofe descriptions, no criterion of the fpecies. 

 In the lait mentioned work, the S. Convolvuli is thus defcribed : — 

 " Alis integris, pofticis nigro-fafciatis margine poftico albo pun6tatis, 

 abdomine rubro cingulis atris." And this defcription will be found 

 applicable to either of the infects before us : in both the wings are 

 entire, the pofterior pair barred with black, the hinder margin 

 dotted with white, and the abdomen red, with belts of black. 



The Fabrician character ®f S. Convolvuli ; — ( cc Alis integris nebu- 

 lofis, pofticis fubfafciatis abdomine cingulis rubris atris albifque." 

 Syfi. Ent. 544.) will alfo agree very nearly with either : the wings in 

 both are entire, and clouded : in both the pofterior wings are barred 

 though flightly in Convolvuli, and confpicuoufly in the other, and in 

 each the abdomen is belted with black and red, though in Convolvuli 

 every fegment is marked at the bafe with a band of white, no trace of 

 which appears in the other. 



From the above it will be inferred, that the defcription which the 

 lateft work of Linnaeus offers will correfpond with both the infects in 

 queftion, and that of Fabrieius will alfo accord in almoft every effential 

 particular ; notwithstanding which, we are perfuaded, for the following 

 reafons, they ought to be confldered as diftinct ;— 



1. The Sphinx Convolvuli, fo far as we have been enabled to com- 

 pare the two kinds, is rather larger : this difference, we admit, may 

 arife from the influence of climate, or any other adventitious caufe. 



2. There is a flight difference in the contour, the curvature in th« 

 floping margin of the wings being raoft diffufe in S. Convolvuli. 



3. The anterior wings in both are clouded and greyifh, but in our 

 prefent infeft the grey is finely varied with ochraeeous hues; and 

 there is, befides, in the middle of the wings of the latter, a perfeaiy 

 characterise fufcous blotch, margined behind with an irregular greyilh 

 fubcatenated band, neither of which appear in the wings of S Con- 

 yolvuli. 



4- 1$ 



