ENTOMOLOGY 827 
of Haplochilus or Gambusia affinis) against the anopheline larvae, and bottom 
feeders (such as species of Dormitator) against those of Aédes aegypti.’ 
THE Mos@QuiITorEs OF THE BELGIAN CONGO 
The mosquito fauna of the Belgian Congo, although as yet but partially 
known, is very large. This is due to the extent of the territory as well as to the 
many different ecological conditions met with there. In 1927, Dr. J. Schwetz 
published the first comprehensive list of Congo mosquitoes, enumerating one 
hundred and five species and six varieties.2, A number of additional species, dis- 
covered since, have been recorded by H. Schouteden, C. Seydel, A. Duren, 
F. W. Edwards, and A. M. Evans; while the Harvard African Expedition ob- 
tained an undescribed species, Culex ninagongoensis Edwards. All these findings 
bring the total number of mosquitoes known at present (December 1929) from 
the Belgian Congo to one hundred and twenty species and eleven varieties, as 
shown by the subjoined list.* 
The most striking feature brought out by this list is the large number of 
anophelines. Out of a grand total of twenty-eight species described from the 
Ethiopian Region, no less than twenty have been recorded from the Belgian 
Congo. Most of these are widely distributed over Africa; a few, such as A. 
obscurus, are strictly West African; and several, such as A. argenteolobatus, A. 
aureosquamiger, A. distinctus, A. kingi, and A. transvaalensis, belong to the East- 
and-South African fauna, and, in the Belgian Congo, have been only found in 
the Katanga. 
Megarhinus brevipalpis (Theobald). Eretmapodites leucopous Graham. 
* Uranotaenia alboabdominalis Theobald. cs oidipodeios Graham. 
% sa balfourt Theobald. - quinquevittatus Theobald. 
coeruleocephala Theobald. Armigeres albomarginatus (Newstead). 
* pallidocephala Theobald. * Aédes (Stegomyta) aegypti (Linnaeus). 
Uranotaenia (Pseudoficalbia) fusca Theobald. africanus (Theobald). 
oe ec 
inornata Theobald. apicoargenteus (Theobald). 
mashonaensis Theo- chaussiert Edwards. 
bald. as “ luteocephalus (Newstead). 
: masseyt Edwards. 
sanguinae Theobald. + re powert (Theobald). 
ie chrysogaster Graham. schwetzi Edwards. 
2 grahami Theobald. simpsont (Theobald). 
ra inornatus Newstead (EH. melano- * “ ie vittatus (Bigot). 
pous Graham). Aédes (Banksinella) crassiforceps Edwards. 
“ee ce 
a odgesia ci yptopus Theobald. 
“cc 
1 A useful review of this subject is contained in a pamphlet issued by the International Health 
Board of the Rockefeller Foundation: ‘The use of fish for mosquito control.’ (New York, 1924, 120 pp.). 
2 Schwetz, J. 1927. ‘Synopsis des moustiques connus du Congo belge.’ Rev. Zool. Afric., XV, 
3, pp. 271-319. 
3 In drawing up this list every effort has been made to eliminate synonyms. Culex thalassius Theo- 
-ald has not been included; obviously, as Schwetz (loc. cit., p. 300) has pointed out, this species does not 
occur in the Belgian Congo. 
The forms marked with an asterisk have been collected by the Harvard African Expedition. 
Since the manuscript was sent to the printer, Dr. H. Schouteden has reported the occurrence in the 
Belgian Congo of three additional mosquitoes: Harpagomyia trichorostris Theobald, A édes (A édimorphus) 
abnormalis Theobald, and Aédes (Aédimorphus) nigeriensis Theobald (1930, Rev. Zool. Bot. Afric., 
XVIII, pp. 431-433). These bring the total number of species known from the Belgian Congo to one 
hundred and twenty-three. 
