101 



TEXT-BOOK OF ENTOMOLOGY 



111:11 iv Coleoptera (Curculionidae, Cleridse, Ptinidae, Dermestida\ 

 Byrrhidae, Scarabaeidae, Elateridae, and Cerambyeidae), and in the 

 Culicidae, and a few other Diptera, though they are especially char- 



7 r 



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Fio. 221. Flattened and spinulated hairs of tufts of larva of Acronycta hattuliferu. 



acteristic of the Lepidoptera, not a species of this great order being 



known to be entirely destitute of them. 



The scales vary much in shape, but are more or less tile-like, 



attached to the surface 

 of the body or wing by 

 a short slender pedicel, 

 and are more loosely 

 connected with the in- 

 tegument than the hairs, 

 which are thicker at the 

 base or insertion than 



1 





The markings of the 

 scales, both of Synaptera 



FIG. 222. Scales from dorsal tuft on second thoracic and Lepidoptera, are 

 segment of larva of ffoatropocha yuercifotia. 



very elaborate, consist- 

 ing of raised lines, ridges, or striae with transverse ridges between. 

 " The striae of the transparent scales of Micropteryx are from about 

 500 to 300 to the millimetre, varying in different species. The 



