A Synoptical View of the Mosquitoes of British Guiana. 197 
Genus TRICHOPRONOMYIA. Theobald. 
Two species are known, one occurs in the colony. 
Trichopronomyia microannulatus. Theobald. 
Proboscis banded and enlarged on apical half. Abdomen with 
basal median creamy yellow : pots, last two segments with almost 
complete bands. 
This species was described from a single male as was also the species annulata on which the 
genus is founded. I have not met with another specimensince the one bred from water taken 
from a pond in Stanley Town and sent to Mr. Theobald, and the female so tar continues unknown, 
(B. G. Med. Ann., 2908, pp. 9, 23.) 
Genus TAENIORHYNCHUS. Arribalzaga. 
Two species occur in the colony. 
Legs basally pale banded. Abdomen unbanded, lateral pale spots 
Thorax dark brown, prothorax with saddle-shaped area outlined in 
golden scales, branching laterally in diagonal lines; mesothorax 
with two lines anda median patch of similar scales. 
1. fasciolatus Arribalzaga. 
(B. G. Med. Ann., 1905, pp. 20,37. 1906, pp, 68,76. 1908, pp. 20. 24.) 
Abdomen banded apically. Thorax rich brown golden scaled a paler 
V-shaped mark on each side. 
2. confinnis, Arribalzaga. 
(B. G. Med. Ann., 1905, p. 20.) 
Genus Curysoconops. Goeldi. 
This genus was separated from Taeniorhynchus to include a number of yellow 
species, the eggs almost rhombic in shape, the prevailing asymmetrical, wing 
scales and general appearance seem to justify their separation. 
Chrysoconops fulvus. Wiedemann. 
(B.G. Med. Ann., 7905, p. 20,29,37. 1906, p. 76. 1908, p. 24. 
Thorax yellow in front, darker behind. Abdomen ochreous, un- 
banded. Wings costa yellow, apex brown. 
Genus Mansonia. Blanchard. 
Two species have been identified here. T%ttilans is the common coast 
species met with. Fascipes has been collected only in the interior at 
Omai. The larve of tittilans have been recently traced to their habitat 
by Mr. H. W. B. Moore and are similar in their way of life to those of 
Taeniorhynchus perturbans which Professor J. B. Smith found some 
inches deep in the mud and attached to the roots of water plants. 
Plants of the Pistia sp.p. are, Mr. Moore says, favoured by tattilans. 
Proboscis banded. Thorax uniformly dark brown. Posterior 
border of wings with black and pale scales. ; 
1. tittilans. Walker. 
(B. G. Med. Ann., 7905, pp. 20, 26, 27, 37. 1906, pp. 68, 72, 73, 76. 1908, pp. 
13, 20, 24.) 
