The recognition of the fact that the Culicidae are responsible 
for the transmission of serious diseases has resulted in a very 
-- bid growth of our knowledge of these insects. The “Monograph 
the Culicidae,’ 5 by Mr. Theobald, originally published in two 
v’Olumes, with an Atlas of Plates, in 1901, has already been 
supplemented by two further volumes which appeared respectively 
in 1903 and 1907. The desirability of bringing out a new 
supplement is indicated by the author’s statement, in the 
Introduction which follows, that the present volume contains 
A. - descriptions of twenty-one genera and of three hundred and 
ninety-two species not included in Volumes I-IV. 
Taking into consideration the fact that the first two volumes 
hafe for some time been out of print, it has been decided to 
include in the present volume some mention at least of all the 
spdcies described in any of its predecessors. This enlargement, 
beyond the scope of a mere supplement, with the addition of 
tables for the determination of genera and species, should* 
materially facilitate the use of the earlier volumes. 
The new collections on which the present work is principally 
based have been received by Mr. Theobald, but will be handed 
over to the British Museum as soon as the volume is published. 
Among these, attention may be called to the collections received 
from the localities given in the subjoined list:— 
(i) Ceylon; from E. E. Green, Esq., Government Ento¬ 
mologist. 
ii) India; from Dr. J. It. Adie. 
ii) Andaman Islands ; from Drs. It. E. Lowis, and Ray White. 
biv)~ 'ChAra^yTrom Dr. C. E. Cornford. 
(v) West Africa; from Dr. Creighton Wellman. 
(vi) Ashanti, etc.; from Dr. W. M. Graham. 
(vii) The Sudan; from Harold H. King, Esq., Entomologist to 
The Wellcome Research Laboratories, Gordon Memorial 
College, Khartum. 
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