( 98 ) 



than in the seven 1911 females. It was interesting that the 

 effects were similar in kind in the two sexes, although very 

 different in degree, also that the females, in which the differ- 

 ence was but slight, were more uniformly affected than the 

 males. 



[cxli 



Species of the Genus Teracolus. — Dr. F. A. Dixey 

 exhibited specimens of Teracolus ephyia, King, and some 

 allied forms, together with drawings of their respective scent- 

 scales. He remarked that Teracolus ephyia was originally 

 described and figured by Klug from specimens captured at 

 Amliukol in Nubia. The uppermost specimen in the exhibit 

 was from Meroe on the Upper Nile, close to the place where 

 King's specimens were taken. Next came a pair, £ and °> 

 captured by Dr. Longstaff near Khartum. The exhibit in- 

 cluded a specimen of T. lais, I Intl., caught at Artesia in 

 Bechuanaland by Prof. Poulton. This form might be regarded 

 as the geographical representative of 7'. ephyia in South 

 Africa. With regard to the scent-scales, it was interesting to 

 observe that a fairly gradual transition in size took place from 

 one extreme to the other of the geographical series. All 

 these forms appeared to be somewhat rare. Prof. Poulton's 

 specimen of T. lais was the only one in the Hope Collection 

 czlii ] 



with the exception of two caught by Bnrchcll, probably in 

 1812. The British .Museum contained only two, or at the 

 most three, of /'. lais, and only three specimens of T. ephyia. 



Dr. G. B. Longstaff observed that many species of the 



genus look lunch alike on the wing, and that j>ossibly T. ephyia 

 ma) have been passed over as being inconspicuous among 

 larger species. 



