How do we infer phylogenetic relationships from electrophoretic studies? What is the value of such phylogenies? What can we infer from these phylogenies about the processes of divergence? These are the questions that we have tried to answer empirically by analyzing genetic variability in 76 taxa of rodents, most of them being muroids. Our approach is comparable to that of Patton and Avise (1983), and is aimed at comparing the values of quantitative and qualitative analyses of electrophoretic data. However, their material and ours differ in evolutionary patterns, and the results differ accordingly in some respects.

Electrophoretic patterns of blood proteins were compared among groups of Arvicanthis niloticus from widely distant origin: Senegal, Haute-Volta, Egypt. Four blood proteins/enzymes were studied: albumin, transferrin, esterase and 6-phosphogluconate dehydrogenase. The results demonstrate two levels of difference: (a) inter-population differences; and (b) intra-species genetic polymorphism. The latter was not observed for all populations nor for all loci. The differences between populations suggest that some process of specification could be under way among Arvicanthis.

Une serie de formes de souris de pelage rougeätre ou orange, ires caracteristiques par leur museau long, leurs grandes oreilles, leurs incisives orthodontes ou proodontes et leurs M* tres roduites, vivent dans les savanes qui entourent le bassin congolais, depuis la Republique Centrafricaine au nord jusqu'au Zimbabwe au sud. Bien qu'elles soient toutes com parables, on peut reconnaitre plusieurs especes parmi elles ; cependant leur variabilite rend pratiquement impossible I'etablissement d'une c!6 de determination.

Article ETUDE CYTOGENETIQUE ET TAXONOMIQUE DE 40 TATERA ET TATERILLUS PROVENANT DE HAUTE-VOLTA ET DE REPUBLIQUE CENTRAFRICAINE (RONGEURS, GERBILLIDAE) was published on January 1, 1970 in the journal Mammalia (volume 34, issue 4).

Article LISTE PRELIMINAIRE DES RONGEURS MYOMORPHES DE REPUBLIQUE CENTRAFRICAINE. DESCRIPTION DE DEUX SOURIS NOUVELLES: MUS OUBANGUII ET MUS GOUNDAE was published on January 1, 1970 in the journal Mammalia (volume 34, issue 3).