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ON AFRICAN LONGICORNIA. 



fPl. IX. anrl X.) 



Bv DR. K. .JORDAN. 



DURING the last year the Trinf? Museum received several collections of 

 Ooleoptera from West Africa, contaiuiug many interestiug and uew species. 

 Besides .some smaller lots of beetles from different localities of the Cougo R., 

 from C!araeroons, Old Calabar, Bathurst (W. Afr.),aud Accra, the Museum acquired 

 extensive collections from Loanda, French Loango, Gold Coast, and Sierra Leone. 

 Especially rich is the material collected by A. Mocqiierys during his visit to the 

 Upper Knilu R. in French Loango, and most of the new species described in this 

 paper are from that locality. The collection from Sierra Leone, made by Dr. W. G. 

 Clements, represents a fine series of species of nearly all families, and includes many 

 peculiar and hitherto unknown forms. 



Having now worked out the Longicornia of those collections, together with the 

 African material of this family already contained in the Museum, 1 give a list of 

 the known species in addition to the descriptions of the new forms ; the known 

 species ticketed " W. Afr. " (withont exact locality) in the Museum's collection are 

 left out, except a very few the occurrence of which in West Africa is of interest. 

 Some South and East African forms are added. 



Intending to give a fuller account of the geographical relations of the West 

 African beetles, when the whole collection is worked out, I here mention only some 

 of the most striking facts derived chiefly from our knowledge of the African 

 Cerambycidae. 



The above-mentioned localities belong U) the " West African Subregiou," the 

 boundaries of which almost exactly agree with the limits of the range of the 

 Buprestid genus J>dodi» in Africa. This genus is very abundant in the southern 

 districts of the Palaearctic Region, and ranges over East and South Africa in a 

 large number of species. The whole forest region of West Africa from Senegambia 

 to Angola, as well as Beuguela, is characterized by the total absence of Jidodis. 

 One species {J. aeqiunoctiaUs (Oliv.), occurs fmm Senegambia to Abyssinia and 

 Egypt, and the southern limit of its range may agree with the northern boundary of 

 the West African Subregiou. The districts south of the Sahara occupied by this 

 species and by Sternocera inferrnpta (Oliv.) and St. casf.anea (Oliv.) correspond to 

 R. Bowdler Sharpe's " Sudanese Subregiou," which separates the West African 

 Subregiou from the great desert, and extends from Senegambia as far as 

 Abyssinia. Owing to our present ignorance of the Longicorn fauna of the Sudan, 

 Nubia, and Abyssinia, I can add only two species of Cerambycini and three Lamiiui, 

 the occurrence of which seems to me to be nearly restricted to the Sudanese Sub- 

 region ; these species are Obriaccam fmcutum (Chevr.) and Cordylomera nituH- 

 pennis Serv., both from Senegambia and Bahr el Abiad (Abyssinia), Binntoci'ro 

 tiifasciata (Fabr.) representeil in the Museum from Sierra Leone, Senegal, and Bahr 

 el Abiad, Phryneta aurocincta (Gu6r.) from Senegambia and Bahr el Abiad, and 

 Ceratites jaspidem Serv. from the sami' localities. Then we find Hi/poeschrus 



