160 Mr. W. J. Kaye's Catalogue of the 



The special insular characteristic is however sufficieatly 

 well marked ia certain insects to call for notice, Tithorea 

 megara ( = T.Jlavcscens), Heliconms ethilla and Protogonius 

 ochraccus all exhibit a remarkable pale straw colour of 

 such similarity as to at once suggest a common stress. 

 Dismorphia hroomeie joins in, in only a slightly diminished 

 degree, Mcvhanitis veritahilis shows signs of assuming this 

 colouring by the frequent appearance of a yellow streak in 

 the cell of the hind-wing, but the Ceratinia, viz. euclea, does 

 not show any sign at present of conforming to this colour- 

 ing. The TitJiorca in the above trio is by far the most 

 abundant, and is obtainable in the perfect state almost the 

 whole year round. How far this true T. megara occurs else- 

 where it is impossible to say owing to the confusion in the 

 nomenclature, but Heliconius ethilla is almost if not quite 

 confined to Trinidad, and although Herr Stichel has 

 examined my H. ethilla and pronounced them to be the 

 same as Weymer's H. sulphureus from Thomar on the 

 Rio Negro, I do not agree to this, as Weymer's figure in 

 the " Iris " vi, t. iv, f. 8 (1893) is quite different. The Proto- 

 gonius has only once been taken outside Trinidad, viz. in 

 Cayenne, and this is Butler's type P. ochraceus. The 

 Tithorea, Protogonius and Heliconius all conforming in this 

 way is rather remarkable, as 400 miles south in British 

 Guiana in a similar but many times stronger group, a 

 Tithorea is only a wanderer, while a Protogonius and a 

 corresponding Dismorijhia are altogether absent. Trinidad 

 is far more sunny, at least in the rainy season, than the 

 forest region of Guiana, and has a considerably drier 

 atmosphere in general. 



There are several instances concerning the validity of 

 species that are now proved and which will it is hoped be 

 of interest and usefulness to the systematist and biologist 

 alike. Whether one or two species of Lycorea occurred 

 was for a long while a difficult question to answer, but 

 with the present series there is only one answer — there is 

 one, Lycorea ceres. Lycorea atergatis is in Trinidad only a 

 form of ceres, and no line of demarcation is possible nor is 

 it necessary. Northwards however the ceres form drops 

 out and southwards the atergatis form vanishes. Another 

 problem has been solved by Mr. F. W. Urich. He has 

 bred from the same batch of eggs Papilio anchisiades and 

 Papilio theramenes, and these two are one species. Further, 

 he has bred me a good series from one batch of eggs of 



