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GENUS I. BUTTERFLIES. 

 S E C. IV. WHITES. 



Caterpillars covered with a fine downlike hair : they fix themfelves, in order to change 

 to chryfalis, with a band round the middle, and by the tail with a glutinous filky thread. 



SEC. IV. SP. XXIX. BLACK VEINED WHITE. 

 PI. 24. 



Cratasgi. Linnaus. 



Black veined white. Harris? 



This butterfly makes its firft appearance the middle of June. It is not very common, 

 or eafily taken on the wing, as it flies pretty quick over meadows and corn fields. The 

 beft way to obtain good fpecimens is to breed them from the caterpillars, which may be 

 found in May, on white thorn bufhes, full fed ; fee fig. 1. They are very focial, and do 

 not feparate till they go in fearch of a convenient place for their transformation. The 

 parent fly lays its eggs the end of June, or the beginning of July, in a clufter, on the 

 white thorn bufhes, to which they adhere by a glutinous moifture. The young caterpil- 

 lars are bred in a few days : they then enclofe themfelves in a web, under cover of which 

 they lie in the heat of the day, and come forth morning and evening to feed. At the 

 approach of winter they fpin a very clofe and ftrong web, as a protection from wet and 

 cold ; and under this web they lie concealed without food, till the warmth of the fun in 

 the fpring revives them. They then come out, and feed greedily on the buds and tender 

 leaves of the bufh they are on; and about the middle of May thev prepare for their 

 change to chryfalis, by fixing themfelves by the tail to a twig, or flender branch, with a 

 ftrong white web ; after which they carry a ftrong thread of the fame over their backs 

 near the head. This is likewife made faft to the twig on each fide, and in a day's time 

 the chryfalis appears, as at fig. 2. They remain in this ftate about twenty days, when 

 the butterfly comes forth, and in a fhort time afterward unfolds and dries its wines, and 

 takes its flight, as at fig. 3. For the under parts, with the wings clofed, and erecT as 

 at reft, fee fig. 4. 



