. Bollettino del Museo Americano di Storia Naturale. Storia naturale; scienza. 1924] Chapin Size-Variation in Pyrenestes, un genere di Weaver-Finches 423 Kemp la raccolta ho visto 13 da Bo (Sierra Leone); di G. L, Bates' dal Bitye (Camerun), 9; di Ansorge da Lambarene (Gaboon), 6; mentre a Avakubi (Itmi) ho raccolto 8, e a Faradje (Uelle superiore), 7. Nessuno di questi, sicuramente, è grande abbastanza per fissare la variabilità per ogni singola località. Nowhere è Pyrenestes un abbondante bird; nella foresta di Ituri P. ostrinus si trova in piccoli numeri solo nelle radure; nella parte superiore Uelle è soddisfatta ma

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. Bulletin of the American Museum of Natural History. Natural history; Science. 1924] Chapin, Size-Variation in Pyrenestes, a Genus of Weaver-Finches 423 Kemp's collecting I saw 13 from Bo (Sierra Leone); of G. L, Bates' from Bitye (Cameroon), 9; of Ansorge's from Lambarene (Gaboon), 6; while at Avakubi (Itmi) I collected 8, and at Faradje (Upper Uelle), 7. None of these, surely, is large enough to fix the variability for any single locality. Nowhere is Pyrenestes an abundant bird; in the Ituri Forest P. ostrinus is found in small numbers only in the clearings; in the Upper Uelle it is met but rarely, around patches of dense scrub near marshes or watercourses. We do get an inkling, however, of the geographic variation in size for P. ostrinus by tabulating the measurements of even such small nmnbers by separate localities (Fig. 5). "We see that in general Professor. Fig. 6. Mandibular width in the races of Pyrenestes ostrinus as here recognized. Sexes united. Slight overlapping is shown between rothschildi, ostrinus, and maximus, while gabunensis is distinguished only on female color pattern, and centralis for its relatively larger body with longer wing. Reichenow was wrong in his assumption that large and small birds occurred together. Nevertheless, at Stanleyville^ this is what really happens, and an explanation is needed. The two large-billed specimens were a male and a female taken by me, personally, close to the river and the government station, in 1909 and 1914. The thirteen small ones were collected by Doctor Christy in 1913 for the Tervueren museum; and, while they are all labeled Stanlej-ville, perhaps the}' were taken a little farther back from the river, where there was more forest. It seems pos- sible that the larger subspecies may have invaded the forest region, iProbably also at Bitye, as well as near Stanley Pool and in the Southern Gaboon.. Please note that these images are extracted from scanned page images that may have been digitally enhanced

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• bookcentury1800
• booksubjectnaturalhistory
• booksubjectscience