254 APPENDIX. 



very black, with a light bright ridge down the centre of 

 each ; appearance due to irregular corrugations on the 

 outer surface of the under membrane, slight undula- 

 tions on the outer surface of upper membrane, and to 

 structure between the sujoerposed membranes. 



Plate LXXIY. 

 Lepidocyrtus curvicollis. 



Ordinary scale. 



Appearance somewhat similar to that shown in 

 " the test scale ;" markings smaller, nearer together, 

 not so sharply defined ; the bright ridge on the top of 

 each marking not nearly so prominent ; scale smaller 

 and thinner. 



Lejpidocyrtus Ugnorum. 



Scale. — Structure similar to L. curvicollis ; scale 

 much smaller and thinner ; markings much less dis- 

 tinct. 



Lepidocyrtus gihhulus. 



Scale. — Structure similar to L. curvicollis; scale 

 smaller and thinner than L. lignoruni ; markings very 

 difiicult to resolve with a power of 2000 diameters. 



Plate LXXY. 



Lepidocyrtus violaceus. 



Scale. — Irregular striae or corrugations from pedicle 

 to apex ; " notes of exclamation " markings further 

 apart than in L. Ugnorum. or L. gihhulus, markings very 

 delicate and difl&cult to define with a power of 1500 

 diameters ; corrugations on the outer surface of the 

 under membrane wider, but not nearly so prominent 

 as in L. curvicollis. 



