• African SjJenics of the Geniifi Acraca. 343 



yellowish white, edged with brown and divided in the ntiddle 

 by a dark brown line widened somewhat at the base of each of 

 the papillae which carry the sj)ines. Head black, and the first 

 and last three segments somewhat darker than the remainder. 

 Twenty-four dorsal black spines arranged in a double row. 

 Eleven lateral spines on each side, the last two projecting back- 

 wards. Eight sublateral spines yellow on each side the first 

 pair arising from the fourth segment. 



I have already (Trans. Ent. Soc, 1906) entered rather 

 fully into a discussion of the forms of this extremely 

 variable species. I have slightly altered the list of refer- 

 ences and synonymy from that given op. the previous occa- 

 sion and have separated out the form r\^x\\Q(\ fiavcseens by 

 Oberthiir, and also his semicdbesven^i as they seem suffici- 

 ently different to stand as separate forms. Karsch's form 

 oetuhalia I then knew only from a sketch I discovered at 

 Oxford, but having now seen the actual specimen I jfind 

 that the sketch is quite inaccurate, the form being as 

 above described. In addition to the forms noted, inter- 

 mediates of all kinds may be found in a long series. In 

 Nyassalaud Neave has lately found a form which 

 resembles f. scmifulvcscens, but has the f.-w. spots brilli- 

 antly white instead of obsolescent. In Mr. Trimen's 

 collection there is a ^ from Naivasha (British E. Africa) 

 which is of the black and white variety of the confusa 

 form but has a trace of deep tawny yellow in the central 

 area of the f.-w. In Mr. Joicey's collection there is a 

 ^ which has the f.-w. sepia, the outer part of areas 2, 3, 4, 

 5, and 6 tawny yellow, the spots a vivid white, the h.-w. 

 basal patch tawny with the marginal border of a deeper 

 shade and the margin dusted with brown. 



In the general collection of the Berlin Museum there is 

 a ^ from Mpwapwa which has all the pale markings 

 orange ochreous. 



The larva which I figured (/. c.) was one of a company 

 bred at Nguelo, Usambara, resulting in nine specimens 

 which were of the following forms, 1 ^ $ and 1 $ of the 

 type form, 2 ^ ^ and 2 ^ ^ of f. fnlresccns, one $ of the 

 black and white variety of confum, and one $ confusa with 

 white f.-w. spots and pale ochreous h.-w. patch. 



The species ranges from N. Rhodesia through German 

 E. Africa to British E. Africa and Uganda, but no form 

 seems peculiar to any particular district except hutleri, 



