2 Bulletin American Museum of Natural History [Vol. XLVII 



Sylvisorex gemmeus irene 19 



Sylvisorex oriundus 20 



Scutisorex congicus 20 



Macroscelididae 20 



Rhynchocyon stuhlmanni stuhlmanni 20 



Rhynchocyon stuhlmanni claudi 21 



Dentition of Rhynchocyon 31 



Nasilio fuscipes 37 



INTRODUCTION 



The collection of Insectivores obtained by the American Museum 

 Congo Expedition 1 numbers about 377 specimens, of which 51 represent 

 the Potamogalidse, 140 the Macroscelididae, 9 the Erinaceidse, and 177 

 the Soricidse. In the preparation of this paper the author has had the 

 efficient cooperation of Mr. Herbert Lang, the leader of the American 

 Museum Congo Expedition. The colored plate (Plate I), illustrating 

 individual variation in coloration in Rhynchocyon stuhlmanni claudi, is 

 by Charles R. Knight. The text illustrations are from excellent pen 

 drawings by Mrs. Ziska. 



In working up the material here recorded valuable assistance has 

 been obtained through material loaned for comparison by the authorities 

 of the United States National Museum, through the kindness of Mr. 

 Gerrit S. Miller, Jr., Curator of Mammals, and from the Museum of 

 Comparative Zoology at Harvard University, through the kindness of 

 Director Samuel Henshaw and Dr. Glover M. Allen, Curator of Mam- 

 mals. 



The Soricidse of the Congo Expedition were placed for determination 

 in the hands of Mr. N. Hollister, Assistant Curator of Mammals at 

 the United States National Museum, in 1916, he having then been for 

 sometime engaged in a critical study of the African Soricinae in the Na- 

 tional Museum. His report on the shrews of the Congo Expedition was 

 published in October 1916. 2 



Supplemental Note on Hipposideros langi Allen (Bull. Amer. Mus. Nat. Hist., XXXVII, pp. 434- 

 438, text figs. 4-6. September 29, 1917) . 



Since the publication of the paper on the Congo Expedition Collection of Eats, I have had an 

 opportunity to compare, through the kindness of Mr. Gerrit S. Miller, Jr., Curator of Mammalsin the 

 United States National Museum, three skins and four skulls identified as Hipposideros cyclops (Tem- 

 minck), from Efulen, Cameroon. While these specimens are not from the type region of cyclops 

 (Boutry River, Gold Coast), it is interesting to note that they are uniformly and strikingly different 

 in coloration from the series on which langi was based, indicating at least considerable plasticity in the 

 cyclops group. In langi the whole head is yellowish brown, in strong contrast with the upperparts of 

 the body, while in the Efulen specimens it is uniform in color with the back and the upperparts are also 

 much darker than in langi. The measurements, both external and cranial, indicate slightly larger size 

 for the Efulen form. Whilelangi, as stated in the original designation, is a member of the cyclops group, 

 itshould evidently be recognized as a well-marked geographic race, under thedesignation Hipposideros 

 cyclops langi, and the Efulen specimens as H. cyclops micaceus (de Winton; type locality "Como River, 

 75 miles from Gaboon"), with the description of which the Efulen specimens agree and with which the 

 langi series does not agree. Whether or not micaceus is referable in a strict sense to true cyclops I have 

 not the means at present for determining. 



2 'Shrews Collected by the Congo Expedition of the American Museum.' By N. Hollister. Bull. 

 Amer. Mus. Nat. Hist., XXXV, pp. 663-680, Pis. vn-xi. October 21, 1916. 



