256 



[November, 



H. talpoides (fig. l)*the pmsternum (;,) is narrowed behind with 

 evenly rounded edges, while in H. hanseni, the presternum is 

 broadened behind with prominent angular corners. Tn H. talpoides 

 the tenth abdominal tergum (fig. 2, lo) i« obtusely angular and the 

 eleventh abdominal segment (telson) is acutely triangular both from 

 be ventral (fig. 1, „) and dorsal (fig. 2, n) aspects, while in H 

 hanseni, both tenth tergum and telson are bluntlv roundedf at the 

 extremity. Further, the spines on the lateral regions of the abdominal 

 segments at^ stronger in K. taJpoules (fig. 4) than in //. Unseni. 

 lu the specimen of R. talpoides which I have examined, the third 

 tarsal segment is relatively longer and more slender (fig. 3) than in 

 S hansem.X This character, however, must be considered as less 

 valuable systematically than the differences in the terminal abdominal 

 segments, which afford satisfactory specific characters in so many 

 insects. We have seen that differences in the corresponding segments 

 of the male have been already noticed by de Saussure and Hansen 

 though those naturalists were sceptical as to their systematic' 

 importance. On the whole, with the knowledge that we can .ain 

 from the few specimens of Henn,ncrus so far brought to Europe 

 Sharp s distinction between the two species seems well justified.' 

 Ihe differences may be tabulated briefly as follows.— 

 A.-Prostarnum rounded behind; abdomen broader, margins of segn^ents n,ore 

 spinose; fen,alewith tenth abdominal tergum obtusely angular behind and 

 telson acutely angular; male with ninth abdonnnal sternum broadly obtuse 



behznd; legs with terminal tarsal segment longer than the basal. Hab Sierra 



Leone ' 



talpoides, Walker. 



B.-Prosternum widened behind with angular corners ; abdomen narrower, u.argins 

 of segments less spinose ; female wUh tenth abdominal tergum and telson 

 evenly rounded behind; male with ninth abdominal sternun. produced 

 backward as a short triangular lobe with the apex produced into a small 

 obhque, spinous process ; legs with terminal tarsal segment not longer than 

 the basal. Hab.. Cameroon ; Uganda; (Mozambique ?)...W.«/, Sharp. 

 In his recently issued Catalogue of Orthoptera, Kirby§ accepts 

 bharp s distinction between the two species, which I have here tHed 

 to diagnose. He refers to de Saussure's second paper (1896) in the 

 synonymy of H. talpoides. The Henu.rerus there described and 

 figured, however, belonged to the Cameroon collection from which 

 Professor AuriviHi^s snj^plied the material for Hansen's researches. 



t Ct. Hansen, I.e., pi. iii, figs. 45 > . 1 '• "i, ngs. 4, .j. 



^_ ^§ W. F. Kirby. A Synonymic Catalogue of Ortko.tera, vol. i, London (Brit. Mus.). 1904, 



