540 Rev, K. St. Aubyri Rogers' Bionomic Notes on 



Cram., and B. mesentina, Cram., should be regarded in 

 the same light. 



Whilst at Taveta it seemed to me that these two specie^ 

 formed a centre of convergence for other Ficrinie. On 

 May 10, 1905, the following were captured : — 



B. severina, Cram,, $, 

 TcracoJus halimedc, Klug, $. 

 Teracolus celimene, Lucas, $. 

 Abantis levubic, Wallgr., ^. 



All these species bear a considerable resemblance on 

 the wing, and all settle in exactly the same way with 

 wings half raised. I think Teracolus castalis, Stand,, 

 might be added to the assemblage. The convergence is 

 greatest between the ^ T. celimene and the ^ B. severina, 

 and I have little doubt that the Belcnois has acted as a 

 model in this case. The other two species are more like 

 the males of B. severina and B. mesentina ; and though in 

 mounted specimens it may not seem very evident in the 

 case of the Teracolus still it is very appreciable in nature. 

 The Hesperid is of great interest, as mimicry in this group 

 is so rare. The species has a rapid flight as is usual in 

 this fcimily, but its comparatively large size and its con- 

 spicuous black and white colouring mark it out at once 

 from its congeners and give it a strong superficial resem- 

 blance to the forms mentioned above, 



Teracolus has a habit of congregating in special places 

 to roost every evening, generally several species being 

 present at one and the same place, with the two common 

 species of Belcnois. These places are generally exposed 

 to the ra3's of the sun as it sinks in the western horizon, 

 and the same situations are used for months and even 

 years. 



[Rdbai, Aug. 29, 1908, 



As the rest attitudes of all butterflies are of some im- 

 portance, you may be interested to hear that I twice saw 

 Belenois thysa in the position of permanent rest. In one 

 case a single shattered specimen was observed resting on 

 the under side of the leaf of a small tree where it was well 

 concealed, but two other specimens (quite fresh) were seen 

 resting on the upper side of the leaves of a small bush in 

 the forest with bright green leaves, against which the 

 yellow under side was most conspicuous and could be 



