SERICORID.^—SERICORIS. 59 



Europe, Italy, Dalraatia, Norway, Russia, Armenia, Asia 

 Minor, and in North America in California. 



6. S. rivulana, Scop.-, conchana, Hub. — Expanse § to f 

 inch (15-18 mm.). Fore wings reddish white with broad 

 red-brown basal, central and apical cross bands, the inter- 

 mediate spaces intersected with fine lines. 



Antennas ciliated, light brown ; palpi darker brown ; head 

 very rough, light brown ; thorax red-brown ; abdomen pale 

 gre^T'-brown ; anal tuft pale yellow. Fore wings of rather 

 even breadth, costa arched, apex bluntly angulated ; silvery 

 white, or reddish white, with the markings sharply distinct, 

 chocolate-red ; basal blotch large, angulated outwardly ; 

 central band less broad, deeply indented on both sides and 

 bent outwardly ; beyond is a large trigonate, erect dorsal 

 spot, also a stripe obliquely from the costa to the hind 

 margin, and several broad costal dots united by a similar 

 cloud ; all the intervals between the markings form stripes 

 of the ground colour intersected or divided by fine lines ; cilia 

 white, clouded with red-brown. Hind wings pale smoky 

 brown, with paler cilia. Female decidedly smaller, the fore 

 wings narrow and sharply angulated at the apex, otherwise 

 similar. 



Underside of tiie fore wings smoky black, with yellowish 

 costal dots. Hind wings smoky white. 



On the wing in July and August. 



Larva very active, cylindrical, dirty yellow-green ; spots 

 hardly visible but with the usual hairs ; head and dorsal 

 plate black ; anal plate dull green. 



End of May and June on iipircea jUvpcndida and other low- 

 growing plants apparently preferring the flower spikes — I 

 have reared it from those of Genista tinctoria and Orchis 

 ■iiiaculata — boring into the soft stem, causing the flowers to 

 droop and feeding among them. Abroad it is said to feed in 

 terminal shoots of Ilihcs, Galium, Genista, and Rulms. 



