ENTOMOLOGY 839 
BELGIAN Congo. — Kinshasa (bred by Dr. Duren). 
C. duttoni is one of the common domestic mosquitoes of West Africa, the 
breeding places being hardly ever found far from human habitations. It has 
been recorded from Gambia to Transvaal. 
Culex (Culex) decens Theobald 
Culex decens Theobald, 1901, Liverpool School Trop. Med., Mem. IV, App., p. vii (2%; Bonny, 
S. Nigeria); 1901, ‘Monogr. Culic.,’ II, p. 334, fig. 313 (9). Edwards, 1911, Bull. Ent. 
Res., II, p. 263; 1912, loc. cit., III, pp. 32 and 381 (larva). Macfie and Ingram, 1920, loc. cit., 
XI, 2, pp. 105-112, figs. 1-2 (larva and pupa). 
Culex masculus Theobald, 1901, ‘Monogr. Culic.,’ II, p. 125, figs. 216-217 ( 9 #; Freetown, Sierra 
Leone). 
Culex minutus Theobald, 1905, Jl. Econ. Biol., I, p. 30, Pl. IV, fig. 9-9a ( 9; Transvaal). 
Culex nigrocostalis Theobald, 1909, Colonial Office (London), Miscell. No. 237, p. 16, figs. (on pp. 27 
and 30) ( @ @%; Accra, Gold Coast); 1910, Ann. Mag. Nat. Hist., (8) V, p. 376 ( 2%); 1910, 
‘Monogr. Culic.,’ V, p. 367, figs. 160-163 ( ¢ &). 
Culex lividocostalis Graham, 1910, Ann. Mag. Nat. Hist., (8) V, p. 269 ( 9 o&*; West Africa). 
Heptaphlebomyia simplex Theobald, 1907, ‘Monogr. Culic.,’ IV, p. 5383 (@ only; Bihé, Angola). 
The above synonymy refers to the typical form only. 
LispEeria. — Lenga Town, August 1926. 
BELGIAN Conao. — Congo River at Coquilhatville and Bumba, December 
1926. 
At Lenga Town this species was bred from larvae found in a hole of a fallen 
tree in a forest clearing, together with those of Culex pruina and Lutzia tigripes. 
The specimens of the Belgian Congo were referred by Mr. Edwards, with 
some doubt, to the var. invidiosus Theobald (Culex invidiosus Theobald, 1901, 
Liverpool School Trop. Med., Mem. IV, App., p. xi; ¢; Bonny, 8S. Nigeria; 
1901, ‘Monogr. Culic.,’ II, p. 329; ¢.— Synonyms: Culex euclastus Theobald; 
Culex chloroventer Theobald; Culex aquilus Graham). At Coquilhatville the 
larvae were collected from rain-water that had gathered in the bottom of a steel 
whale-boat. 
C’. decens is a common, semi-domestic mosquito of West Africa, known from 
Gambia to Transvaal. 
Culex (Culex) perfidiosus Edwards 
Culex perfidiosus Edwards, 1914, Bull. Ent. Res., V, 1, p. 72, fig. 12 (9 #; Ilesha and Lagos, 
S. Nigeria; Lokoja, N. Nigeria; Yumbi, Belgian Congo). 
BELGIAN Conao. — Kinshasa (bred by Dr. Duren). Congo River, on board 
ship at Lukolela, December 16, 1926. 
C. perfidiosus is known thus far from Nigeria and the Belgian Congo only and 
is probably strictly West African. 
Culex (Culex) laurenti Newstead 
Culex laurenti Newstead, 1907, Ann. Trop. Med. Paras., I, p. 24 (9%; Leopoldville, Belgian 
Congo). Edwards, 1914, Bull. Ent. Res., V, 1, p. 70, fig. 10 (.); 1921, loc. cit., XII, p. 344. 
Bretaian Conco. — Boma, several females taken on board ship in the river, 
December 2, 1926. Coquilhatville, on board ship, December 19, 1926. A vicious 
biter. 
