SPHINGID.E. 1 1 



some had one fore wing ocdlatiLSj the other populi ; others 

 having ocdlatus bodies y^'iih. populi wings, and the converse. 

 Mr. Porritt states that of several broods which have come 

 under his notice, reared in Yorkshire, every specimen has male 

 antennae, yet specimens with female autenua3 are certainly 

 occasionally reared. The admixture of markings is most 

 strikingly shown in the coloured spot near the anal angle of 

 the hind wings, which sometimes exhibits the ocellated 

 blotch of ocdlatns surrounded by the red of ^^op^t/i, but 

 usually consists of the lai'ge red blotch inclosing a blue, or 

 black, ill-defined cloud. 



The LARV.E, though like those o^ ijopuli when young, appear 

 also to become intermediate, or even to resemble those of 

 ocdlatus when full grown ; and the pupa3 are described as 

 differing from both parent forms. 



S. tiliae, L. — Expanse 21 to 3 inches. l*ale olive-green, 

 or reddish-brown, with hind margin deeply scalloped, and a 

 dark olive-green, usually broken, central band. 



Antennas rather short and slender, whitish, with short 

 brownish pectinations in the male. Thorax moderately stout, 

 pale grey or pale brown, with a greenish tinge ; the collar, 

 a broad stripe down each shoulder, and a narrow line on the 

 back, deep olive-green ; abdomen pale brown, sometimes 

 tinged with smoky or greenish. Fore wings with the costa 

 tolerably straight to near the apex, then rounded ; apex 

 squared ; hind margin deeply concave in the middle, and 

 again near the anal angle, having a projecting point between ; 

 dorsal margin gracefully curved, and hollowed out before the 

 projecting anal angle. Hind wings very short with rounded 

 apex, and the hind margin sinuous but hollowed towards the 

 anal angle. 



Fore wings whitish-grey, tinged with olive-green or with 

 pale reddish-brown, and having the base faintly, and the 

 hind margin deeply, and broadly, clouded with dark olive- 

 green ; there is also a faint waved, olive-green, transverse 



