Plecia — Hardy 
213 
closest related to P. ornaticornis Skuse, from 
Australia, but is differentiated by the pointed 
widely separated lateral lobes of the sternum, 
the presence of the submedian lobes, and by 
the rounded claspers. 
Length: Body and wings, 4.0 mm. 
type locality: Kei Island. 
Type in the British Museum (Natural 
History) . 
Figure 23 of the ventral aspects of the geni- 
talia is reproduced from a sketch made of the 
type by Mr. Paul Freeman of the British 
Museum. 
Plecia rufilatera Edwards 
Fig. 24 
Plecia rufilatera Edwards, 1927, Spolia Zey- 
lanica 14: 119, fig- 1. 
A chiefly black species characterized by 
having the sides of the mesonotum dull red 
and the scutellum reddish with a dark median 
line. Legs and abdomen all black. Wings 
brown, stigma darker than the remainder of 
membrane. R 2 +3 nearly straight and nearly 
vertical. Costa extending almost halfway from 
tip of R 4+5 to Mi + 2 . Halteres black. Genitalia 
as shown in Figure 24, copied from Edwards. 
"Ninth tergite deeply emarginate, lobes 
Fig. 23. Plecia ruficornis Edwards. Ninth sternum 
from sketch by Paul Freeman. 
Fig. 24. Plecia rufilatera Edwards. Genitalia, dorsal 
view, copied from original. 
strongly produced ; sides of sternite also greatly 
produced; claspers minute." 
Wing length: 6. 5 -7. 5 mm. 
type locality: Nuwara Eliya, Ceylon. 
Type in British Museum (Natural History). 
Known only from the type and allotype. 
Plecia siamensis Hardy 
Plecia siamensis Hardy, 1951, Rec. Indian Mus. 
50: 100, figs, a, b. 
A moderate sized species of the fulvicollis 
complex (thorax entirely rufous) and distin- 
guished by the very characteristic male geni- 
talia. It fits closest to P. subvarians Walker, 
from Indonesia, but the ninth tergum is small 
compared to the sternum and the cleft on the 
hind margin of the tergum is narrow, its width 
is only one-fifth to one-sixth that of the seg- 
ment. The ninth sternum has slender, curved, 
acuminate lateral lobes and rather broad 
rounded submedian lobes; the latter separated 
by a U-shaped cleft extending about one-third 
the length of the segment, measured in line 
with the submedian lobes. The claspers are 
obtuse at apices. See original for a more com- 
plete description and figures. 
Length: Body and wings, 6.0 mm. 
type locality: Koh Chang Is., Siam. 
