PLATE!. 7 



in many, but fuch as entitles it to a figure in a future plate ; the want 

 of room determining us to defer it for the prefent. Our figure is that 

 of the male. 



Albin, {Plate 25, SuhjeSi 37,) has given a figure of the male and 

 female on the feme plate, and defcribes a male to have changed to the 

 aurelia flate as in our plate reprefented July 16, and March 18 fol- 

 lowing to have produced the Fly. But the time of their appearance de- 

 pends on the proportion of heat and cold 5 what the author mentions 

 was prefer ved from the feverity of winter, in a warm room ; the ufual 

 time to find them in the caterpillar ft ate is Auguft, and in April the fly. 



The fingular provifion which nature makes for the proteftion of 

 this Fly deferves particular notice ; when the time of its continuation 

 in the caterpillar ftate is expired, like all others, it refufes to eat ; it 

 then, by much labour, forms a kind of bag or purfe, of a very tough 

 fubftance 5 this it fixes againft the trunks of trees, &c. by a number 

 of hairs or filaments, which remain on the external furface. It lines 

 the outer cafe by one of a finer texture, the top of which is clofed by 

 feveral briftles that unite in the center, exa£lly reprefenting a cap, and 

 excludes almoft the poflibility of its receiving an injury during this 

 defencelefs ftate. In this bag it paffes to the aurelia, and remains until 

 the birth of the perfect infeft. — Our figure reprefents the chryfalis or 

 aurelia in the bag ; part appears torn away to exhibit its iitua^ion 

 therein. 



Were we to unite the feveral accounts of authors refpe^ling its food 

 it would appear a general feeder ; it will however live on the rofe, the 

 elm, and the willow j and on thorns and brambles particularly. 



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