Vol. XI, Nos. 10 & 11.] The Fauna of the Jordan System. 451 
[W.S. } 
il 
(Marsch. Bieb.). The species is thus in all proba ability of 
Nilotic origin, but it is possible that its migrations may have 
taken place in the opposite direction and that it may have 
originated in Cyprus or in the Jordan and made its way south- 
wards to Egypt. 
Considered as a whole, the Crustacea of the Lake of Ti- 
berias have a distinctly Palaearctic character. Several species 
and one genus (7'yphlocaris) are endemic in the Jordan system, 
but none of the former are at all strongly differentlated and 
the peculiarities of T'yphlocaris are clearly correlated not with 
geographical but with environmental isolation. 
Insecta. 
I have omitted from my list of the fauna the names of the 
the Lake of Tiberias, for two reasons—firstly because the 
insect-fauna of the Jordan valley is still very imperfectly 
own, and secondly because several important papers bearing 
directly or ipa on the entomology of Palestine are 
epee get in Ca 
e fo subi rapa species are represented in my collec 
tion,! aes also includes at least two species of Képhemoridac 
that have not yet been named :— 
CoLLEMBOLA (see Carpenter, Journ. As. Soc. Bengal (n.s.) IX, 
pp. 215-217 : 1913). 
Cyphoderus genneserae, * rues 
Oponara (see Laidlaw, tom. cit., pp. 219-220). 
Trithemis annulata (Pal. de PF site ) and Brachythemis leuco- 
sticta m. 
DIPTERA ‘ae Brunetti, tom. cit., pp. 43-45 ; Edwards, tom. cit., 
pp. 47-51 ; Keiffer, Vol. x (1914), pp: 369-372. 
Psychodidae _. Phelebotomus minutus, Rond. and 
Chironomidae a Pelopia Cygnus, Koil, P. monilis 
pes sclonbimbeartat eee ae Keif. 
Tipulidae .. Geranomyia anna noe * Edwards, 
Conosia irrorata ata (Wi d.). 
' This collection was made at the time se a the end of the asp 
season, most unfavourable for eeibbichacieal wo 
