Introduction. 
vii 
to those sent to the Museum); a number of British Gulicidae 
from Mr. Bradley and Mr. Verrall, and numerous other smaller 
lots, which have been of great help to me. 
The collections received officially by the Director of the 
Natural History Departments, British Museum, are acknowledged 
in the Appendix, together with the names of the collectors. 
The dates recorded after each collector’s name are those of the 
communication sent with the specimens and printed on the labels. 
There are still several districts from which we have abso¬ 
lutely no specimens and from which I know of no records of 
Gulicidae , but which are sure' to exist in numbers. Amongst 
the most important places so far unworked is the Pacific coast 
of South America, where we may expect many new species to 
be found. But little collecting has been done on the Pacific 
coast of North America. Practically nothing is known of the 
Western Australian forms, of those of the Cape and of the 
interior of South America. No new material has been received 
from the Malay Archipelago. 
By far the greater number of specimens received have been 
those found in and around the habitations of man. There are 
probably still a great number of species to be found deep in 
woods and forests, purely sylvan species, especially amongst the 
Megarhinas, Sabethes, and Wyeomyias , and jmobably several new 
genera will be found on searching such localities. A collection, 
for instance, recently received from Trinidad, collected in forest 
growth and in cocoa plantations bordering the forests, did not 
contain a single species previously sent from the West Indies or 
South America, and contained a new genus ( TricJioprosopon ). 
Before this I had thought the West Indian species were 
exhausted. 
Although these sylvan species are not of so much importance 
economically, they are nevertheless of interest and scientific 
value, and it is hoped collectors will avail themselves of ojDpor- 
tunities of procuring Gulicidae in distant inland and uninhabited 
parts of the various continents. I may here point out that 
Gulicidae need not necessarily be pinned when fresh. When 
travelling and collecting, and time and space are of importance, 
mosquitoes may be collected in pill-boxes and kept firm by 
medicated cotton wool. Glass topped boxes are best, the gnats 
being placed on the glass and then a plug of wool placed on 
them. I have found they travel well this way, and keep free 
from mites, <kc. 
