Genus Psorophora . 123 
from the second to the seventh. Lateral hairs of the abdomen paired 
and flattened; on the anterior segments each hair is large and 4- to 
7-branched, hairs becoming smaller and with fewer branches on the 
hinder segments. Comb of six or seven scales in a curved row, the 
largest in the middle. Central scales joined by a thin broad chitinous 
band, the upper and lower scales separate, base of each scale oyal, 
sides coarsely setose below, the apical free border with one curved 
stout central spine and two to six much shorter lateral spines. Air- 
tube fusiform, inflated, deeply infuscated, devoid of hairs, about four 
times as long as wide (at the base); pecten rows of four well separated 
in each, a fifth small pair at the extreme base in some specimens ; 
rows one-quarter length of tube; upper two pairs of teeth with two 
or three smaller denticulations on both sides. Band ringing the anal 
segment about as long as broad; barred area running along the whole 
length of the band. Ventral tufts 18-20 pairs. A pair of tufts and 
long simple setae dorsally. Anal gills very long, narrow, pointed, 
times as long as the longest hairs of the ventral brush. Pupa with 
short, stout siphons. 
Observations .—Four living larvae of this handsome species were 
taken from a temporary pool in a logwood thicket, about 5f miles 
along the Molynes Boad, near Kingston, early in April, 1906. The 
larva is large and stout, the head, which is much compressed antero- 
posteriorly, is set at right angles to the thorax, and the large antennae 
are carried almost vertically downwards, giving the larva a peculiar 
appearance. The description of the larva is drawn up from the larval 
skin cast, that of the adult head, thorax and abdomen from the freshly 
killed specimens. A notable feature in the male is the thickly-scaled 
second antennal joint.” 
Genus PSOROPHORA. Robineau-Desvoidy (1827). 
Essai, s. 1. tribu d. Gulic. Mem. d. 1. Soc. d’Hist. Nat. d. Paris, III., 412 
(1827), Kobineau-Desvoidy; Mono. Culicid. I., 259 (1901); III., 180 
(1903); IV., 158 (1907), Theobald. 
Six species have been described in this genus,* all from 
]ST. and S. America and West Indies. 
The only six I know tabulate as below — 
A. Femora white at apices. 
Hind femora white scaled at apex ......... scintillans. Walker. 
All femora white scaled at apex __...... genumaculatus. Cruz. 
$ 
* Dyar and Knab describe three other species (vide Appendix). 
