Tetramfric litgencrotinn of the Tarsus in Pliasmida?. 507 



any other species of the group, tlii.s butterfly differs from all 

 iu liie nuicli greater restriction of the ochreous colouring on 

 the primaries of the male (which commences beyoml the end 

 of the cell), in the entirely different coloration of the under 

 surface, the j)rimaries being saffron-yellow on basal two fifths, 

 very ])ale creamy yellow on 'the disk, and with the dark 

 bands golden olive or yellow-brown, the two outer bands on 

 the secondaries near together and arched rather than angu- 

 lated (as in T. vesta as compared with T. viutans). From all 

 the species excepting T. ILmni/i^loni it differs in the minute 

 discocellular spot on the primaries. Only the wet-season 

 form is known at present either of T. Ilanniiujtoni ox of this 

 species. 



98. Terncohis protomedia. 

 Pontia p-otomodia, King, Symb. Phys., Ins. pi. viii. figs. 13, 14 (1829). 



Eanges from the Albert Nyanza northward to Abyssinia 

 and eastward through Somaliland to Arabia. 



It is closely related to the preceding species and especially 

 to T. llanningtonij but its superior size, bright uniform yellow 

 colouring, black-veined primaries, less banded upper surface 

 of secondaries, and lack of a subbasal band on the under 

 surface of these wings, have saved its being regarded as a 

 variety of T. vesta. These differences, though perhaps not 

 greater than exist between T. amelia and T. miitans^ are more 

 readily grasped without effort. 



The seasonal differences are well defined, the wet-season 

 phase having the chief markings below smoky brown, partly 

 veined with saffron-yellow; the intermediate fortn has these 

 markings redder and with well-defined veining ; the dry 

 phase has them almost wholly bright reddish orange. At 

 Aden all three types occur together as mere variations. 



LIX. — On the Tetrameric Regeneration of the Tarsus 

 in Phasmida3. By Edmond Bordage"^. 



At tlie meeting held on January 25 last I had the honour to 

 communicate to the Academic des Sciences a few of the 

 principal results that I had obtained previously with refer- 

 ence to the phenomena of autotomy in Phasmidgef. In 

 conclusion I spoke of the process of regeneration of the ampu- 



* From the ' Comptes Rendus,' t. cxxiv. no. 26 (June 28, 1897), 

 pp. 1536-1538 : from a separate impression commmiicated by the Author. 

 t Vide supra, pp. 473, 470. 



34^ 



