TRIFID^E. 9 



Genus 79. CERASTIS. 



Antennas threadlike ; eyes naked, with short front and back 

 lashes ; thorax rather flattened, faintly crested at the back ; 

 abdomen broad and much flattened, without crests ; fore 

 wings horizontal when at rest, short and truncate, or very 

 blunt, with expanded hind margin ; hind wings broad, cross- 

 bar very faint ; vein 5 hardly perceptible except close to the 

 hind margin. 



Larvae elongate, cylindrical, but attenuated in front, with 

 a well-marked dorsal plate. Feeding on trees and also on 

 low plants. 



PuPiG subterranean. 



We have three species, rather closely allied : 



A. Fore wings very broad with the apex bluntly angulated. 



B. Fore wings drab, liver-coloured, or red-brown, several 



black dots in the base of the reniform stigma. 



C. crythrocephala. 

 B -i . Fore wings chestnut-red, with a black or brown spot 

 filling the base of the same stigma. C. vaccinii. 



A 2 . Fore wings narrower, apex pointed, hind margin refuse. 



C. ligula. 



1. C. erythrocephala, Schiff. — Expanse 1^ to 1| inch. 

 Fore wings broad behind and very blunt ; pale purplish-brown 

 rippled with purple-red, or else dark purple-red ; in the base 

 of the reniform stigma is a cluster of dark dots ; hind wings 

 smoky-brown with a purplish gloss. 



Antennas of the male simple but ciliated with regular tufts 

 of fine bristles almost resembling minute pectinations, brown ; 

 palpi short, so broadly tufted as to obscure the apical joint, 

 purple-brown ; eyes smooth, brown, with dense black back 

 lashes ; head tufted, pale chestnut ; thorax similar, smooth, 

 with a faint flattened tuft at the back ; fascicles smoky- 



