230 Oil neio Genera and Species o/Scolopendrldge. 



fl^*. Stigmata of the third so- 

 mite ear-shaped. 

 Ithysida, Wood *. Type lithobioides, 

 (Newp.). 



6^'. Stigmata of the third so- 

 mite sigmoid or c/:> -shaped. 

 Tretnatoptychus, Peters !■ T^pe afer, 

 Peters. 



b^"^. Stigmata very large and sieve- 

 like. 



a^'. Prosternal plates present; 

 legs and pleurae spined. 



a^°. Prosternal plates small; 

 a distinct basal tooth 

 on the maxillipede. 

 Ethmophorus, gen. nov. Type monticola, 

 sp. n. 



6'"'"'. Prosternal plates very 

 large; no basal tooth 

 on the maxillipede. 

 JSeterostoma J", Newport. Tj^De trigono- 

 poda (Leach). 



h^^. Prosternal plates wholly 

 absent ; pleurae not 

 spined. 

 Anodontostoma, Tomosvary §. Type octo- 

 sulcatum, Tomosvarj'. 



Of these genera the following three are known to me only 

 from description : — Scolopendropsis^ Plutonium^ and Anodon- 

 tostoma. 



EXPLANATION OF THE PLATES. 

 Plate IV. 



Fiy. 1. Heterostoma lonyicauda, sp. n. Anal somite, external view. 



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



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



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



Fig. 3. Heterostoma rubripes, var. grossipes, nov. Anal sumite, 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 lo7igicornis, sp. n. Anal femur, internal view. 

 Fig. 6. Khysida calcarata, sp. n. Anal femur, internal view (J). 

 Fig. Qa. Ditto. Ditto ($). 



* Syn. Branchiostoma, Newport (num. pra;occ.). 



t Syn. Ptychotrema, Peters. 



t Syn. Uacettnn, Koch. 



§ Syn. Edentisto7na, Toin6svar3\ 



