Explanation of Plates. 437 



Fig. Lycorean/e. 



8. Lycorea ceres : captured by C B. Roberts, probably Dec. 1901 or 



Jan. 1902 : in Hope Dep. 



9. Lycorea pasinuntia : captiired by C. B. Roberts, Oct. 1901 : in 



Hope Dep. 

 The same specimen is represented in Fig. 2, PI. XXVII. 



Heliconin.e. 



10. Heliconius silvcma ab. divisus : captured, in 1904, by G. C. Cole 



at Tumatumari, Potaro Kiver, fifteen miles above confluence 

 with the Essequibo : in Coll. Kaye. 



11. Heliconius numata : captured by C. B. Roberts, Feb. 10th, 1905 : 



in Coll. Kaye. 

 The same specimen is represented in Fig. 8, PI. XXVI. 



12. Heliconius eucoma, ; captured by C. B. Roberts, about 1902 : in 



Coll. Kaye. 



13. Eueides nigroftdva, $ : captured by C. B. Roberts, June 30th, 



1902 : in Coll. Kaye. 



14. Eueides isabella : captured, in 1904, by G. C. Cole at Tumatu- 



mari (see Fig. 10) : in Coll. Kaye. 



Plate XXVI. 



Series of Melinxa mneme and Heliconius numata, showing parallel 

 transition from barred to black hind-wings. 



All specimens are from the Potaro River, thirty miles above its 

 confluence with the Essequibo, British Guiana. (Between the eighth 

 and tenth mile from the Potaro, on the road to the gold mines.) 



All figures are | of the natural size. 



1 Melinsea mneme, $ : captured by C. B. Roberts, Aug. 28th, 1903: 

 in Hope Dep. 



2. Melinsea mneme, $ : captured by C. B. Roberts, Aug. 28th, 1903 : 



in Hope Dep. 

 The same specimen is represented in Fig. 6, PI. XXIV, XXV. 



3. Melinsea mneme, $ : captured by C. B. Roberts, Aug. 28th, 1903 : 



in Hope Dep. 



4. Melinsea mneme, ^ : captured by C. B. Roberts, Aug. 28th, 1903 : 



in Hope Dep. 

 6. Meling&a mneme, $ : captured by C. B. Roberts, Aug. 29th, 1903 : 

 in Hope Dep. 



