KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 47. Vo 6. i'».". 



During thc rainy season this töad was verv common in the neighbourhood ol 

 Nairobi. Professor Lönnberg writes in his diary "m about his observation on this 

 töad in Mombasa: Heavy rain the whole night; the toads had big eoncert, and con- 

 tinued also af ter day-light. Af ter breakfast I went out and found their abode in a 

 rain-pool. Tliey were mostly mated, in copula and silent, but some of them sat w ith 

 half of the body above the water on the branohes of Bidens and croaked, producing 

 a sound very similar to, although slower than that of the wooden instrument (a kind 

 of rattle), formerly used in Sweden for raising hares when hunting. The gular saek 

 was enormously inflated, it was diminished for every croaking; it did not, however, 

 coDapse, but was inflated to the size of a large wal-nut, even when the animals were 

 silent. When the gular säck was filled to its maximum, the sides of the body were 

 eompressed. The males were as a rule lighter in colour than the females, yellowish 

 green with some red on the hind part of the thighs; the females were dark olive 

 grey. Sometimes a second male attempted to attach to a pair in copula as in our 

 common töad.» 



Bufo lönnbergi n. sp. — Plate 2, tig. 4, 6. 



28 specimens from Kenia, ' ib U 1911, in waterfilled elephant-tracks 2,500 m. above 

 the sea (2 specimens, the figured ones, in copula). 



2 specimens between Blue Post and Roiru river ' å U 1911. 



Crown without bony ridges: snout rounded, short, as long as the diameter of 

 orbit; canthus rostralis angular; interorbital space considerably broader than the 

 upper eye-lid. Tympanum perfectly hidden. Fingers and toes rather long and slender; 

 first finger shorter than second; toes webbed at the base; the toes and to some 

 extent also the fingers b road and flattened, the tips of the fingers and toes rounded ; 

 subarticular tubercles simple, faintly developed; the soles rather feebly tubercular; 

 two small metatarsal tubercles; no tarsal fold. The length of tibia marked off from 

 knee forwards along the body reaches halfway between axil and eye or to the eye. 

 A long narrow parotoid gland immediately behind the eye, feebly prominent, as long 

 as, or rather longer than, the distance between its anterior margin and the tip of the 

 snout. Skin smooth or with small weak tubercles. Lower surface granulated. In the 

 young specimens the skin is minutely prickled. 



The males are uniform påle, or dark olive green, or uniform dark olive brown 

 to nearly black. Some specimens which may be considered as intermediate forms 

 between the green and the darkbrown ones have the green ground colour indistinctly 

 dotted with dark especially on the anterior part of the back. In all male specimens 

 the under surfaces are uniform yellowish white. The females (only 3 in the whole 

 collection) are greyish to blackish brown ; a dark irregular band from the nose above 

 the eye and along the inferior margin of the parotoid gland ; sometimes a dark trans- 

 verse band between the eyes and a narrow faint indication of a light dorsal median 

 line; the limbs are dotted with black and the belly marbled with bluish black. The 

 colour of the young ones resembles rather much that of Bufo regularis; on the back 



