CRAMBUS] CRAMBIDAE 391 



beyond second line to termen, costal spot before second line 

 much more elongate. 



Surrey to Dorset and Norfolk, S. Ireland, local ; N. and C. 

 Europe; 6-8. 



6. 0. dumetellus, ffb. 20-23 mm. Differs from C. pratellus 

 as follows : forewings with interneural streaks whiter, upper 

 edge of median streak angulated beyond middle, terminal white 

 streak reduced to an apical spot. 



Britain to Caledonian Canal, local ; N. and C. Europe, N. 

 America ; 6, 7. 



7. 0. pratellus, L. 18-20 mm. Forewings with apex some- 

 what produced ; brown, sometimes ochreous-mixed, in $ with 

 grey, in $ with whitish blackish-edged interneural streaks ; a 

 subcostal white streak on basal half ; a white median streak, 

 upper edge straight, lower edge projecting in middle, cut by 

 sharply angulated dark brown median line ; second line angu- 

 lated, white, edged with dark brown, preceded by white costal 

 mark ; a white terminal streak, with several black dots : cilia 

 metallic. Hindwings rather dark grey. 



Britain to the Shetlands, Ireland, very common ; N., C., and 

 SW. Europe, Asia Minor ; 5-8. Larva greenish-grey or brown- 

 ish-grey ; dots darker ; head brown, darker-marked : in silken 

 galleries above or among roots of grasses ; 7-4. 



8. C. culmellus, L. 17-19 mm. Forewings brown ; a whitish 

 median streak, ending in branches along veins 2-5, often 

 separated by dark fuscous scales ; dorsal often wholly suffused 

 with whitish-ochreous ; a terminal series of black dots ; cilia 

 metallic. Hindwings rather dark grey. 



Britain to the Shetlands, Ireland, abundant; N. and C. 

 Europe, N. Asia ; 6-8. Larva pale pinkish-ochreous ; spots 

 brown ; head and plate of 2 brown, darker-marked : in silken 

 galleries amongst stems of grasses (Festuea, etc.) ; 9-6. 



9. 0. hortuellus, Hb. 18-22 mm. Forewings brown; veins 

 except towards costa marked with whitish-ochreous streaks, 

 sometimes broadly suffused and yellowish-tinged ; leaden-grey 

 dark-edged interneural streaks ; angulated second line and a 

 short streak from costa near apex leaden-grey ; three black dots 

 on lower half of termen ; cilia metallic. Hindwings grey. 



Britain to the Shetlands, Ireland, very common ; N. and C. 

 Europe, WC. and N. Asia, N. America ; 6, 7. Larva dull purplish- 

 brown ; spots darker or black ; head and plate of 2 pale 

 yellowish-brown to dark brown : amongst stem-bases of grasses ; 

 9-4. 



