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sfriffos'js (Gyll.) from tlie districts of the Senegal R. represented in Abyssinia by a 

 similar form, H;/i>ocschrus strigosus abifssinicim snbsp. nov. : and it is of interest 

 to note, that the genera Cajit/iarocnemis, Coelodon, and Pachydissus, which range 

 over E. India and the eastern and southern parts of Africa, are also found in Sene- 

 gambia, while they are evidently absent from the West African Subregion. The 

 coleopterous fauna of the districts between the Benue R. and iSokoto is of a West 

 African type, as far as I can tell from a number of species that form part of the 

 collection made by Mr. P. Staudinger during the expedition of E. Hartert and P. 

 Staudinger to Kano and Sokoto (1885-6) ; many of the species are identical with 

 either those from Sierra Leone, or from the Gold Coast, or from the Knilu R. 



The southern boundary line is usually saiil to agree with the Quauza R. Our 

 collection from Loanda is confined to such species as are either identical with, or 

 closely allied to, species from the Congo R. or French Loango (Kuilu R.), and 

 includes scarcely any South or East African form. When we come to examine the 

 Longicornia described from " Angola " we find them mostly of the West African 

 type, as well as those known from the Ui)i)er Quauza R. ; but we also find the 

 fauna of these districts already intermingled witji a number of decideiUy South or 

 East African genera, as Phi/llocneina, Closteromertis, Plirisaoma, and some others, a 

 fact which sliows this country to be .it the junction of the West and South African 

 fauna. These facts render it j)robable that the northern parts of Angola as a whole 

 should go with the West African Subregion, and that we have to fi.x the limit of this 

 Subregion south of tlie Quauza R. ; l)ut at ]ireseut we cannot exactly determine the 

 southern boundary, even if there is an exact ])arting line, especially as most of the 

 Longicornia known from this district have no other locality given but simply 

 " Angola." The collections, however, made in this country incline me to suppose 

 that the boundary line may commence at the coast south of the Quanza, and that 

 inland it bends southward about as far as the thirteenth degree of southern 

 latitude, and then curves northwards to the Up])er Congo. 



The districts of the Upper Congo, near the Stanley Falls, exhibit a West 

 African coleopterous fauna intermingled with decidedly East African types, while 

 a few West African forms (for example Mecosaspis) range as far east as Nyassa 

 Land. 



The West African Longicom fauna lias a large series of characteristic forms, 

 besides many genera of a wider range. If we omit the new genera proposed in this 

 paper, and also those occurriug only in Senegambia, we find at present more than 

 T.5 genera confined to the West African Subregion. The great feature of the 

 Longicorn fauna of these districts is the abundance of Callichromini. A series of 

 genera of this conspicuous group is peculiar to West Africa, as Omopti/cha, Dictator, 

 Synaptola, Gloniopkorus, Rhopalizus, Eulitopm, etc., while others (as Oxyprosopus 

 and EuporuH) here occur in a large number of species, but are also represented by 

 a few forms in the South and East of the Continent. Then there are the lyciform 

 C'erambycini Ampkidesmus and Dinstelloptems, and the remarkable genera Allo- 

 gaster, Pfyckolaemus, Oedaenoderus, and others. Among the Lamiini we meet with 

 many peculiar forms, as Ecphora, Anauxesis, Petrognatha, Protonarthron, Plectro- 

 scapus, Plagiomys, Eurysops, Pinacostcrna, Acridocephalu, etc., and find the follow- 

 ing groujjs to be prevailing : Monnkammitii, Prosopocerini, Steniotomini, Trago- 

 cephalini, PIn-ynetini, Crossotini, and Saperdini. The Priottini have five genera 

 peculiar to West Africa, two of which (Aiioeme and Sol/nrus) are of great interest, 

 being without close relations to any other Prionid genus known at present. 



