THE COLORATION PROBLEM. 145 



less crisply defined. The zigzag marks (of centaureae) on 

 hind margin more rounded, often reduced to spots only. 



sibirica. 



4. The marginal marks of hindwing usually form a continuous 



line or band from vein 3 to vein 8. alpina. 



5. The basal of the two spots between 1 and 2 veins hindwing 



distinct, well outlined, long and narrow, parallel to veins. 



androniedae. 



6. Paler and less distinctly marked, ground colour pale ochreous, 



spots faintly ochreous tinted (not white), resulting in a 



vagueness and blurring effect, as compared with other 



species. cacaliae. 



[H. cashmirensis and H. ofeer^/i/iri omitted, as I have no specimens.] 



(To he continued.) 



The Coloration Problem. 11. 



By W. PARKINSON CURTIS, F.E.S. 

 [Concluded from page 126.) 



26. Picus Yiridis, L. The Green Woodpecker. 



Observers. — W. P. and E. H. Time. — Afternoon. 



Curtis. 



Date. — June 21st, 1913. Sex. — As below. 



Place. — Canford, Dorset. Duration. — 3 hours. 



Food. — (Watched with x 25 glasses from 200 yards.) After two 

 hours ? returned with a beakful of grey fluffy material, a regular 

 mass. The bird was suspicious of our presence and watched from a 

 bough near the nest, and gave us an opportunity of scrutinising the 

 food, we came to the conclusion that it was certainly moths, and 

 W.P.C. thought they were Boarmia repandata, but it will be obvious 

 that that is something very like guesswork. 



Five minutes later the S" arrived, but we could not see what he 

 brought. 



Note. — We have found from subsequent experience that this par- 

 ticular part of the afternoon is the worst for this bird, as it seldom 

 feeds the young in the afternoon. 



Observer. — W. P. Curtis. Time. — Afternoon. 



Date.— May 14th, 1916. - Sex.— <?. 



Place. — Canford, Dorset. Duration. — Casual. 



Food. — Observed to tear out the nest of a small black ant and con- 

 sume larvae, pupae and imagines. 



Observer. — E. H. Curtis. Time. — Afternoon. 



Date. — June 14th, 1914. Sex. — As below. 



Place. — Canford, Dorset. Duration. — 1 hour 50 minutes. 



Food. — Unidentified every time. Three visits only, two by ? and 

 one by <? . Both parents entered the nest to feed. Observations cut 

 short by heavy thunderstorm, referred to by W.P.C. under D. m. 

 anglicus. 



Same nest. Time. — Morning, 6.30. 



Date. — June 17th, 1914. Duration. — 1 hours. 



Food. — Neither parent fed. 



