BUTTERFLIES 233 



42. Purple Hair-streak (Zephyrus quercus). So called from its purple hue ; 

 under side grey. 



Food plant Oak, sometimes sallow. 



Larva Red-brown, downy, whitish cross lines ; Wood-louse shaped. 

 Pupa Red-brown ; on leaf generally. 



Eggs Light brown, with pinkish shade, covered with fine network ; flat- 

 tened. July to August. 



Locality Oak woods ; generally distributed. 



43. Black Hair-streak (Thecla pruni). Brown-black; orange marks on 

 border of hind-wing, upper side. 



Food plant Blackthorn. 



Larva Yellow-green, with darker markings ; Wood-louse shaped. 



Pupa Black and white, on leaf ; like bird's dropping. 



Eggs Red-brown ; flattened. June to July. 



Locality Very rare. 



44. White Letter Hair-streak (Thecla W-album). Blackish; white "W" 

 on under side lower wing. 



Food plant Elm. 



Larva Yellow-green ; Wood-louse shaped. 



Pupa Brown ; two purple lines on back ; on or under leaf. 



Eggs Whitish, shape like other Hair-streaks. July. 



Locality A very local species ; Essex and elsewhere. 



45. Green Hair-streak (Callophrys rubi). Unmistakable from its green 

 colour, under side. 



Food plant Furze, rock-rose, broom. 

 Larva Light green-yellow cross lines. 

 Pupa Green, becoming purplish brown. 

 Eggs Greenish. May to June. 

 Locality Generally distributed. 



46. Large Copper (Chrysophanus dispar). Extinct. 



47. Small Copper (Chrysophanus phlceas). Coppery, with black marks ; 

 six spots on upper wing ; very variable, however. 



Food plant Dock, sorrel. 



Larva Green, sometimes pinkish shade ; Wood-louse shaped. 

 Pupa Light brown, darker freckles and lines ; hung by tail on leaf, sup- 

 ported by threads round body. 



Eggs Creamy ; surface honeycomb pattern. May, July, October. 

 Locality General. 



48. Long-tailed Blue (Lampides bceticus). Unmistakable from " tail " on 

 lower wings. 



Food plant Seeds in pod, pea, and other Leguminosse. 

 Larva Green, double cross lines on sides ; Wood-louse shaped. 

 Pupa Red, with brown dots ; suspended by waist girdle, head up- 

 ward: 



