294 Mr. F. Walker's Characters of undescribed Diptera 



Islands ; the fourth, or the west coast from Senegambia to Bcn- 

 guela; the fifth, or the coast from the Cape eastward ; the sixth, 

 or the Eastern Islands; the seventh from Mozambique to Bab-el- 

 Mandeb. He reckons the number of Dipterous species therein to 

 be as follows : — 



North-east district 200 species. 



North coast 300 „ 



Western Islands ISO ,, 



West coast 200 „ 



South coast 500 ,, 



Eastern Islands 100 „ 



East coast 50 ,, 



Total 1,530 species. 



He describes the following species of Stratiomidce, all new with 

 the exception of the first, the eighth and the fourteenth, which 

 last may prove to be identical with Plilocera Natalensis. 



Sargina. 



1. Plect'icus elongatus, Guinea, Cape, Caffraria. 



Musca elongata, Fabr. 

 Sargus posticus, Wied. 



2. Chrijsonolus Jiavomarginatus , Mauritius. 



3. Chrysoinyia hella. Cape. 



4. Microchrysa circumscripta, Caffraria. 



5. ,, scutellaris, Caffraria. 



Odontomyina. 



6. Odontomyia quadrinotata, Mozambique. 



7. ,, adust a, Caffraria. 



8. „ frontalis (Macq.), Cape. 



9. Nemotelus dissimilis, CafiVaria. 



10. ,, hcemorrhous, Caffraria. 



11. Oxycera nubif era, Caffrana. 



12. Ephippium macidipenne, Guinea. 



Pachygastrina. 



13. Sternohrithes (n. g.) tuviidus, Guinea, Caffraria. 



14. Ptilocera quadrilineata, Sierra Leone, Caffraria. 



Stratiomys quadrilineata, Fabr. 



