new Species of Rliysodina. 305 



R. mnizechi, Clievr., was also represented by two examples 

 from Salisbury, Mashonaland, both taken at Hglit, Feb. 1894. 



The structure of the antennai is ess'iitially similar to 

 that described above, the main points of difference being as 

 follows : — The fifth ji)iiit is similar to j )inls 2-4, and that 

 described by Chevrolat, followed by Westwood, as the sixth 

 is equivalent to the sixth and seventh of R. marshtlli; the 

 dorso-ventral prolongation of the sixth is not so marked, and 

 the fascicles of haii-s supporting the seventh are extended 

 almost completely round it, concealing the junction of the two 

 joints ; the seventh of Chevrolat corresponds to our eighth, 

 and his eighth to our ninth ; the apical surface of the latter, 

 however, is flat in muizecki. The antenna is therefore com- 

 plete, and does not lack the terminal joints as supposed hj 

 Chevrolat and Westwood. 



Stemmoderus singularis, Spin., one specimen of which was 

 taken by Mr. Marshall at Salisbury, must also be assigned to 

 this group. It was associated by Spinola, and subsequently 

 by Lacordaire, with lihysodes, as, indeed, was Rlnjsodi'na by 

 Chevrolat at a much later period. Both these genera, iiow- 

 ever, have heteromerous tarsi, and, in spite of the difference 

 in facies, the structure of the head indicates that the relation- 

 ship between them is fairly close. Spinola's species was 

 described upon a single example from Senegal, and no further 

 specimen appears to have been recorded. That captured by 

 Mr. Marshall differs a little from the description and figure of 

 the type in not having the hind legs distinctly longer and 

 more slender than the others j but considering the extremely 

 scanty nature of the material, 1 do not feel justified in 

 describing it as new. 



The example in question was taken at light, so that its 

 capture gives us no information upon tiie habits of the species. 

 The slender legs and long tibial spurs suggest that it is a 

 good runner, and are perhaps hardly in accordance with the 

 termitophilous mode of life of those species of the group of 

 which anything of the life-history is known. 



EXPLANATION OF PLATE VL 



Rhysodina marshalli, sp. n. 

 Antenna viewed from in front. 



Ann. & Mag, N. Hist. Ser. 8. Vol xi. 21 



