ORDER LEPLD0PT1 



149 



arc in parts clothed with peculiar hairs, called mia 



(Fig. L78). Frit; M iller has shown that the n 

 certain butterflies are rendered attractive to the othei 

 ecreting odorous oils of the ether 

 Certain hair-like scales ome butterflies give oil' an 



odor, in Pieris napi like that of citrons, while /'. , 

 is slightly odorous; and M filler has observed in the male 

 of Didonis biblis three different odors in different parts 

 of the body. The females of Callidryas have in the end 

 of the body highly odorous glands, while the males give 

 off a musk-like odor from the same parts. 



a 





ill; ; /'. "rdii 



Ih.-liU magnified.— 



Scent-tufts "f moths. 1. / 

 tea,' 8, Pyrrharctia isabeUa.- After Smith. 



Peculiar white or orange-colored, hairy. thread-like 

 os have been found protruding from narrow openings 



near the end of the hind body of certain moths i Fig. I 

 which give out, according to Mr. J. B. Smith, "an in; 

 odor, somewhat like the smell of laudanum.*" 



\\ Idle there is great uniformity in the shape of the body 

 of butterflies and moths, their habits are, within narrow 

 limits, quite diverse. Some fly by day. ■ il dusk, 



others by night. The great number oJ - ; which 



there are estimated to be 25,000, is undoubti dlv <\uc to the 

 variety in the food-plants on which the caterpillars 

 Nearly it* not every specie- of plant affords room and b 



