662 Dr. G. B. Longstaff's Bionomic Notes on Butterfiies. 



in 1904,1 saw spilothyrus thus settle, and in the same year 

 in India saw ransonnetti do so.* 



Though perhaps somewhat out of place I append the 

 beautiful drawing made by Mr. H. Knight (from my 

 sketch and specially set specimens) to illustrate the very 

 peculiar attitude adopted by the common Jamaican 

 Uraniid, Sematura legistus, Fabr, The hind-wings are 

 somewhat fluted, as in Pararge segeria, Linn., the anal 

 angle of the hind-wings is inverted, not everted as in the 

 Lycaenids. One might naturally suggest as a possible 

 explanation a procryptic resemblance to a dead leaf, but 



Fig. 4. 

 SemaUira legistus at rest, viewed from behind. 



the only specimens that I have seen at rest were inside 

 houses whither they had been attracted by light. 



§ 13. Seasonal Dimorphism in Neotropical Butterfiies. 



Seasonal Dimorphism has long been a subject of study 

 in the Oriental and Ethiopian regions, but in the Neo- 

 tropical world comparatively little attention has been paid 

 to it."j" A visit of less than four months, and those within 

 the limits of the winter, or dry-season, affords but little 

 opportunity for the investigation of such a difficult 

 question — and the difficulty is increased by the paucity 

 of cabinet specimens bearing adequate data — nevertheless 

 I venture to offer the results of my observations for what 

 they may be worth. 



In the Old World we see in certain genera of the 

 Satyrines that the same species exhibit two forms, 

 characterised by the presence or absence of ocelli on the 

 under surface of the hind-wings. Similarly two forms are 

 met with in the Nymphaline genus Precis % ; in the one 

 ocelli on the under side of the hind-wings are well de- 



* For the similar habit of Pterygospidea (Tagiades) flesus, Fabr., 

 in S. Africa, see Trans. Ent. Soc. Lend., 1907, pp. 323, 330. 

 t See Dixeij, Proc. Ent. Soc. Loud., 1898, p. xxxix. 

 j Including Junonia. 



