INTRODUCTION. 1 



as to form a kind of roof over it, the ridge of which 

 is some times sharp, at other times rounded. The 

 Cinnabar-moth (PL 21. fig. 2.) affords an example 

 of the former, the Goat-moth (PI. 14. fig. 2.) of the 

 latter. Many of the smaller moths (Tinice) have 

 their wings convoluted, or rolled round the hody so 

 as completely to embrace it. Others, contrasting 

 with these, keep them always fully expanded, so 

 that the posture maintained in flight is scarcely 

 changed when they alight ; of this description are 

 several of the brindled-moths, common in gardens, 

 produced from geometer caterpillars which feed on 

 fruit trees. In some genera the under wings project 

 considerably beyond the upper, as may be seen in 

 the Lappet-moth. It may likewise be noticed that 

 several of the small Tortricidce are remarkable for 

 having a sudden and deep emargination on the 

 anterior edge of the upper wings, as if a semicircular 

 portion were cut out ; whence they are known to 

 collectors by the epithet of Notch-wing moths. 



A difference in the port of the wings is sometimes 

 a sexual distinction, but that is often marked in a 

 more decided manner. On this subject it may be 

 regarded as the most general rule, that the female, 

 contrary to what is observed in many of the higher 

 animals, is larger than the male, sometimes even 

 double the size*. The greater or less development 

 of the antennae has been already mentioned as occa- 



* In" the clouded Buff-moth (Euthemonia Rir9ula), and a 

 few other species, the female* however, is constf iab> small 

 Pa: the other sex. 



