THE RIVULET. 20$ 



the southern counties of England, this species (Plate 82, Fig. 14) 

 may be disturbed by the beating stick. It is generally to be 

 met with in July and early August, but may be obtained in 

 forward seasons, or in sheltered localities, at the end of June. 



On the fore wings the dark, slender and wavy cross lines are 

 more distinct in some specimens than in others, and occasionally 

 the blackish blotch on the front margin is traversed by a white 

 line, sometimes by two lines. 



The caterpillar is pale ochreous brown, with three darker 

 brown lines along the back, the central one slender, spotted 

 with black on the middle rings ; usual dots, black, encircled 

 with white ; head, marked with a reddish brown triangle. It 

 feeds on Clematis in August and September. 



Distribution of the species abroad extends to Amurland, and 

 in Japan, Corea, and China it is represented by th<e darker 

 inguinata, Butler. 



The Rivulet {Perizotna affinitata). 



The whitish band crossing the brownish fore wings is generally 

 fairly wide, sometimes broad, but occasionally it is very narrow ; 

 the reduction in width is mainly the result of brownish suffusion 

 of the outer half of the band, leaving the inner half white. 

 Kane mentions a smoky form from Co. Derry, in which the 

 band is absent, and refers this to ab. unicolorata, Gregson. In 

 a specimen from Sligo in my series, the band is tinged with 

 brownish throughout. The hind wings are usually smoky brown, 

 with a paler central band, but in some specimens, referable to 

 ab. turbarta, Stephens, the basal two-thirds are whitish. The 

 moths also vary in size (Plate 83, Figs, i and 2). 



The caterpillar is pinkish-ochreous inclining to brown ; three 

 pinkish lines along the back, and a similar line along the 

 blackish spiracles ; a dark plate on the first and last rings. It 

 feeds in the capsules, on the seeds, of red campion {Lychnis 



