SMERINTHUS HYBR. HYBRIDUS. 177 



Forewings. Expanse: Right 27 - 5mm., left 29mm. 



Width (across centre of wing) : Right 9 - 5mm., left 9 - 5mm. 

 Hind margin : Eight 14-7mm., left 15-5mm. 

 Margins of both forewings similar except that the anal angle is 

 more acute in the left. 



Markings on right more blurred than on left ; ground colour 

 slightly lighter on right than on left. 



Hindwings. Expanse : Right 17mm., left 18mm. 

 Width : Right 9-5mm., left 9'5mm. 

 Margin slightly more dentated in right than in left, but anal angle 

 more pronounced in left. Ocellated spot, and its dark margin, lighter 

 in right than in left. Reddish basal blotch smaller in right than in 

 left. 



Underside. General colouring slightly lighter on right than on left. 



2. Perfect Gynandromorph. — Right side £ ; left side $ . Right 

 antenna typically $ — length 9;3mna. Left antenna typically $ — 

 length 9'6mm. Thorax perfectly halved ; right side dark brown 

 dorsally, brownish grey laterally, the dorsal and lateral portions being- 

 separated by a white streak ; left side uniformly pale grey. 



Abdomen: right side brownish grey, left side pale grey; anal 

 clasper absent on right side, but well developed on left. Right side 

 contracted less than left. 



Forewings. Expanse : Right 28mm., left 28mm. 



Width : Right 10mm., Ieft8-3mm. 



Hind margin : Right 16mm., left 14mm. 



Right hind margin less dentated than left ; right anal angle less 

 pronounced than left. 



Upper.ude. All markings more distinct, and pale blotches' whiter 

 on right than on left. 



Underside. Right with basal half pale reddish ; left uniformly 

 brown. Ground colour much lighter on right than on left. Pale 

 blotch near hind margin more distinct on right. 



Hindwings. Expanse : Right 17.7mm., left 17mm. 

 Width : Right 10.5mm., left 9.8mm. 



Hind margin simple on right, dentated on left. Anal angle less 

 pronounced on right than on left. 



Upperside. Ocellated spot on right fairly clearly defined and 

 pupilled, on left dark and blurred. Veining more distinct on right 

 than left. Transverse lines of populi less visible on right than on left. 

 Reddish blotch paler and much larger on right than on left. 



Underside. Ground colour darker on left than on right. Trans- 

 verse lines interrupted on left, continuous on right. 



3. Incomplete Gynandromorph. — Intermediate between (1) and (2) 

 in many characteristics. Right antenna very slightly pectinated (wot 

 typically ? ) — Length 8.5mm. Left antenna considerably pectinated 

 (typically J ) — Length 11mm. 



The dark rectangular blotch of the thorax is central anteriorly, but 

 is continued posteriorly on the right side only. Thorax grey laterally 

 on the right side, the dorsal and lateral portions being separated by a 

 whitish streak ; left half of thorax uniformly grey. 



Abdomen apparently ? ; paler grey on right than on left. 

 Forewings. Expanse: Right 29mm., left 31mm. 

 Width : Right 11mm., left 10mm. 

 Hind margin : Right 15-5mm., left 17mm. 



