euchoeoa] HYDRIOMKNIDAE 



19. Euchoeca, Hh. 



Face smooth, flat. Antennae in $ shortly ciliated. Palpi 

 short, slender, loosely scaled. Pore wings: areole simple. Hind- 

 wings : 8 anastomosing with cell to beyond middle. 



A small genus, containing a few species distributed through- 

 out the northern hemisphere, and one Australian. 



1. Ground-colour of forewings whitish . . 2. 



„ „ not whitish . 3. 



2. Postmedian striae ferruginous towards costa 4. Blorneri. 



„ „ not ferruginous . 3. sylvata. 



3. Cilia sharply barred . . .2. obliterata. 



,, not barred . . . .1. luteata. 



1. E. luteata, Schiff. 18-20 mm. Forewings pale yellowish ; 

 the six fasciae marked with strong deep ochreous-orangc striae, 

 last throe twice sinuate, connected by a longitudinal suffusion 

 in middle ; a dark fuscous discal dot. Hindwings as forewings, 

 but first three fasciae absent. 



England, Argyll, common ; N. and C. Europe, N. Asia ; 6, 

 7. Larva on maple and alder ; 8-10. 



2. E. obliterata, llufn. (heparata, Hw.) 21-22 mm. Fore- 

 wings light ochreous, densely sprinkled and posteriorly suffused 

 with fuscous ; a clearer costal streak from base to % ; several 

 indistinct fuscous striae, one in middle angulated near costa ; 

 cilia distinctly barred. Hindwings as forewings, but without 

 markings. 



England, Shetlands, rather common ; N. and C. Europe ; 6, 

 7. Larva rather stout, green ; a dorsal series of square black 

 yellow-edged spots : on alder ; 8, 9. 



3. E. sylvata, Hb. (testaceala, Don.) 21-23 mm. Forewings 

 whitish, sprinkled with fuscous, with grey striae ; edges of 

 basal patch and median band rather dark brown, posterior 

 thicker on upper half, rather prominent below costa and in 

 middle. Hindwings as forewings, but without markings on 

 basal third. 



England, C. Ireland, rather local ; C. Europe ; 6, 7. Larva 

 yellowish-green; a broad dark purple-brown dorsal stripe, 

 posteriorly rosy, centrally dilated so that on 5-9 it reaches 

 below spiracles, edges darkest and yellow-margined ; yellow 

 lateral patches on 5 and 9 ; dorsal line purple-whitish ; on 5-8 

 purple doi-sal spots, connected with whitish V-shaped marks; 

 head and plate of 2 blackish-brown : on alder and Salix ; 8. 



4. E. Blorneri, Curt, (pulchraria, Ev.) 20-23 mm. Fore- 



