436 LEPIDOPTERA. 



winiijs smoky-white, witli a purple tinge toward the apex. 

 13ody and le<^s yellow-brown. 



A frequent variety, in both sexes, has a narrow pure white 

 stripe, very distinctly, running along the costa of the fore 

 wings ; and sometimes this is edged by a darker shade of 

 crimson-purple. 



On the wing in July, August, and the beginning of 

 September. 



Lakva nearly an inch long, head and second segment deep 

 dull black ; papillae pinkish-grey tipped with black; mouth 

 grey with a black streak midway across the upper lip ; 

 dorsal line black, and from it to the spiracles on either side, 

 are four black, and five green, ragged-edged lines, making a 

 total of nineteen lines from one spiracular region to the 

 other, as it approaches full growth the green lines become 

 more indistinct or even pale drab or dirty white on the 

 thoracic segments ; undersurface dingy green, with a ventral 

 black line ; a black ring is round each ventral proleg. (W. 

 Buckler.) 



August till June or July on Zo/».s- vornicidatuft. and 

 Tri/olium repcns, sometimes several in company, drawing 

 together the young shoots with fine silken threads. 

 Hybernating while still small. 



Pupa moderately stout, broadest across the thorax and 

 wing covers, rounded above and sloped suddenly toward 

 the head ; wing covers long and close to the body ; anal tip 

 rounded and furnished with two widely separated thorny 

 points ; dark mahogany brown, darkest on the back of the 

 abdomen, the tip black ; wing covers and under parts lighter 

 brown ; the whole surface shining. (W. Buckler. j 



The moth is restricted to chalk districts, and hides among 

 the short herbage on ojien downs, whence it may sometimes 

 be disturbed in the daytime, but will then only fl}' in the 

 sunshine. Its natural fiight is at night, and it will come to 



