EAST AFRICAN REPTILES AND AMPHIBIANS 107 



As far as I am aware these constitute the first authentic records of 

 the occurrence of this species in Kenya Colony; one such that has 

 appeared was based on a confusion of this species with Arthroleptis 

 minutus as recorded below under that name. An example from the 

 Yala River (M. C. Z. 12839), however, was received from the British 

 Museum several years ago and agrees with a long series from the lake 

 region collected by Dr. J, Bequaert for the Museum of Comparative 

 Zoology. 



The stomach of one of these frogs held ants, a beetle, astaphylinid 

 beetle, a cockroach, and a spider. Another specimen exhibits sub- 

 dermal parisitization of the thighs by a larval mite. 



Genus ARTHROLEPTIS Smith 



ARTHROLEPTIS MINUTUS Bonlenger 



Arthroleptis minutus Boulenger, 1895, Proc. Zool. Soc. London, p. 539, pi. 30, 



fig. 4. (Durro, western Somaliland). — Barbour and Loveridge, 1928, 



Mem. Mus. Comp. Zool., vol. 50, p. 216. (Amani and Phillipshof, Usambara 



Mtns., Tanganyika Territory.) 

 Arthroleptis scheffleri Nieden, 1910, Sitzber. Ges. Naturf. Freunde Berlin, p. 438. 



(Nairobi and Kibwezi, Kenj'a Colony; Mpwapwa, Tanganyika Territory; 



Zanzibar.) 

 Arthroleptis albifer Ahl, 1924, Archiv. fiir Naturg. vol. 90, p. 251. (Usa- 



ramo, German East Africa =Dar es Salaam District, Tanganyika Territory). 

 Arthroleptis graueri Angel (not of Nieden), 1925, Reptiles et Batraciens, in 



Voyage de Ch. AUuaud et R. Jeannel en Afrique Orientale (1911-12). Paris, 



p. 54. (Mt. Kinangop, Kenya Colony.) 



2 (U.S.N.M. 39482, 39484) Gondokoro, U. (Sm. Afr. Exped.) 1910. 



1 (U.S.N.M. 41496) Mt. Kenya Trip, K. C. (Sm. Afr. Exped.) 1909. 



9 (U.S.N.M. 49247-55) Mt. Gargues, K. C. (Sm. Afr. Exped.) 1909. 



43 (U.S.N.M. 49324-66) Mt. Sagalla, K. C. (Heller) 1911. 



1 (U.S.N.M. 63534) Victoria Falls, Zambezi. (Raven) 1919. 



The Sagalla series consists of 33 males, ranging in length from 14 

 to 16 mm., with an average of 15.3 mm.; 10 females, ranging from 15 

 to 20 mm. with an average of 17.5 mm. The 11 others are of doubt- 

 ful sex, being mostly juvenile; they range from 10 to 18 mm., with an 

 average of 14.1 mm. 



It is not always easy to sex representatives of this species without 

 resorting to dissection, but the Mount Sagalla series have evidently 

 been taken at breeding time, for each of the 10 females maybe recog- 

 nized by the ova which are visible through the abdominal wall ; in ad- 

 dition it might be observed that the center of their throats lack the 

 baggy appearance due to the vocal pouch of the males; moreover, the 

 throats of the males are usually, though not invariably, darkly pig- 

 mented, something like those of the males of Phrynohatrachus natalensis. 

 If one compares the snouts of sexed specimens it will be noticed that 

 those of the males are more pointed than those of the females, which 

 58528—29 8 



