146 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 
From the time that we reached the edge of the forest belt (altitude 7,000), on Mount 
Kenia, we heard these tree dassies every night, and at all camps to an altitude of 10,700 
feet they were common. I once heard one on a bright afternoon about four o’clock, 
and on a second occasion another about two hours before sundown. Although I 
searched diligently on the ground for runways, and for suitable places to set traps, 
no such place was found. In a large yew-tree that had split and divided fifteen feet 
from the ground, I found a bed or bulky platform of dried leaves and moss of nature’s 
manufacture. On the top of this some animal had placed a few dried green leaves. 
In this bed I set a steel trap and carefully covered it, and on the second night (Octo- 
ber 14), captured a dassie containing a foetus almost mature. We were informed by 
our “‘boys’’ that these animals inhabited hollow stumps and logs as well as the foliage 
of the live trees, but we found no signs that proved it, although, judging from the din 
at night, dassies were abundant everywhere in the forests. 
At evening, about an hour after darkness had fully settled, a dassie would call and 
in a few seconds dassies were answering from all around, and the din continued for 
half an hour or an hour. The note began with a series of deep frog-like croaks that 
gradually gave way to a series of shrill tremulous screams, at times resembling the 
squealing of a pig and again the cries of a child. It was a far-reaching sound and 
always came from the large forest trees. Often the cries were directly over our heads 
and at a time when the porters were singing and dancing about a bright camp fire. 
Although we tried many times to shine their eyes with a powerful light, we never 
succeeded, nor were we able to hear any rustling of the branches or scraping on the 
tree trunks as one might expect an animal of such size to make. The porters were 
offered a rupee apiece for dassies, but none was brought in. 
DENDROHYRAX CRAWSHAYI LAIKIPIA Dollman. 
1910. Procavia (Dendrohyrax) bettoni Roosevett, African Game Trails, Amer. ed., 
p. 472; London ed., p. 484. (Not of Thomas and Schwann.) 
1911. Dendrohyrax crawshayi laikipia Dottman, Ann. and Mag. Nat. Hist., ser. 8, 
vol. 8, p. 131. July. (Rumruti, Laikipia Plateau, British East Africa; 
type in British Museum.) 
Specimens.—Forty-one, from the following localities: 
British East Arrica: Donyio Burru Mountains, west of Lake 
Naivasha, 2 (Mearns, Heller); Mountains near Lake Naivasha, 
8,000-9,000 feet, 15 flat native skins (Mearns); ‘‘ Nairobi,’’ purchased 
at. 24 flat native skins (Rainey). 
All of these specimens are clearly referable to this form rather than 
to either of the forms described from nearby regions: Dendrohyrax 
bettont (Thomas and Schwann),' from Rogoro, mile 346 of Uganda 
Railway, British East Africa; or Dendrohyraz vilhelmi (Lénnberg) ,? 
from Donya Sabuk, northeast of Nairobi. 
1 Procavia bettoni Thomas and Schwann, Abstr. Proc. Zool. Soc. London, No. 6, p. 23. April 26, 1904. 
2Procavia (Dendrohyrar) vilhelmi Lounberg, A¥kiv f. Zool., vol. 10, No. 12, p. 26. 1916. 
