230 On new Genera and Species 0/ Scolopendridse. 



a 13 . Stigmata of the third so- 

 mite ear-shaped. 

 Rhysida, Wood *. Type lithobioides, 

 (Newp.). 



ft 18 . Stigmata of the third so- 

 mite sigmoid or en -shaped. 

 Trematoptychus, Peters f. Type afer, 

 Peters. 



6 17 . Stigmata very large and sieve- 

 like. 



a 19 . Prosternal plates present ; 

 legs and pleurae spined. 



a 20 . Prosternal plates small ; 

 a distinct basal tooth 

 on the maxillipede. 

 Fthmophorus, gen. nov. Type monticola, 

 sp. n. 



b 20 . Prosternal plates very- 

 large; no basal tooth 

 on the maxillipede. 

 Heterostoma J , Newport. Type trigono- 

 poda (Leach). 



J 19 . Prosternal plates wholly 

 absent ; pleurae not 

 spined. 

 Anodontostoma, Tomosvary §. Type octo- 

 sulcatum, Tomosvary. 



Of these genera the following three are known to me only 

 from description: — Scolopendropsis, Plutonium, and Anodon- 

 tostoma. 



EXPLANATION OF THE PLATES. 

 Plate IV. 



Fig. 1. Heterostoma longicauda, sp. n. Anal somite, external view. 



Fig. 1 a. Ditto. Anal femur, upperside. 



Fig. 1 b. Ditto. Anal femur, underside. 



Fig. 2. Heterostoma viridipes, sp. n. Anal somite, external view. 



Fig. 3. Heterostoma rubripes, var. grossipes, nov. Anal somite, from 



above. 

 Fig. 3 a. Ditto. Anal femur, from below. 

 Fig. 4. Ethmophorus monticola, gen. et sp. nov. Anal somite, external 



view. 

 Fig. 4 a. Ditto. Maxillary sternite and feet. 

 Fig. 5. Rhysida longicornis, sp. n. Anal femur, internal view. 

 Fig. 6. Rhysida calcarata, sp. n. Anal femur, internal view (d 1 )* 

 Fig. Gfl. Ditto. Ditto ($). 



* Syn. Rranchiostoma, Newport (nom. prseocc). 



t Syn. Rtychotre?)ia, Peters. 



X Syn. Hacctum, Koch. 



§ Syn. Edentistoma, Tomosvary. 



