Plecia — Hardy 
197 
rounded at apices, and with a narrow sclero- 
tized bridge joining them at bases (Fig. 8 b). 
Aedeagus with a pair of slender, rodlike 
accessory structures. 
Length: Body, 7. 5-8. 5 mm.; wings, 8.5- 
9.3 mm. 
type locality: (Of P. thoracica Guerin) 
Coromandel, S. E. India. 
Type probably in the Museum National 
d’Histoire Naturelle, Paris. 
This is one of the common species of India 
and Ceylon. I have seen specimens from sev- 
eral localities on Ceylon; from Mysore, Nilgiri 
Hills Coimbatore, S. Malabar, Katihar, N. 
Bengal, and from Tezpur, Assam, India. Also 
a female from Naukauri, Nicobar Islands, 
appears to be this species. 
Edwards also recorded this from many lo- 
calities in India and Ceylon and said that 
Brunetti’s records of Plecia fulvicollis Fabricius 
should refer to this. 
Plecia dorsalis Walker 
Plecia dorsalis Walker, 1857, Linn. Soc. Lon- 
don, Proc. 1: 5. Preoccupied by Plecia 
dorsalis Macquart, 1838, Dipt. Exot. 1: 86. 
It is impossible to place Walker’s dorsalis 
and this species must be treated as a species 
duhium. In the original description, Walker in- 
dicated that both sexes were present in his 
type series from Singapore and Mount Ophir. 
No type was designated and the description, 
based only upon color, would fit both sexes 
of all of the species of the fulvicollis complex 
(those with the thorax entirely rufous). If 
Walker had a male (or males) in the original 
series, it has apparently been lost. I could not 
find it in the British Museum (Natural His- 
tory) collection. At least part of Walker’s 
series is in the National Museum of Victoria, 
Melbourne, Australia. A. Neboiss has reported 
that they have one female specimen from 
Singapore and one female from "Mt. Ophir, 
one wing missing, abdomen glued on and be- 
longing to a different species of Diptera.” 
Without a male from one of the two localities 
mentioned by Walker, it is impossible to 
place this species. Walker later recorded dor- 
salis from the Aru Islands, Borneo, Mysol, 
and Amboyna but it is probable that he had a 
mixture of species before him. One male from 
Sarawak, Borneo, in the National Museum of 
Victoria, has been studied by A. Neboiss and 
from the drawings which he made at my re- 
quest it is obviously a specimen of P. 
subvarians Walker. 
P. dorsalis Walker has commonly been 
treated in the literature as a synonym of P. 
fulvicollis (Fabricius) but it is not possible to 
confirm this synonymy. Brunetti (1912, Fauna 
of British India, Diptera Nematocera, p. 163) 
was obviously in error when he recorded 
dorsalis from India as a synonym of P. fulvi- 
collis (Fabricius). 
Plecia dubia Edwards 
Fig. 9 a-c 
Plecia dubia Edwards, 1928, Jour. Fed. Malay 
States Mus. 14: 44, figs. 39, 39a. 
The genitalia show relationship with P. 
amplipennis Skuse but the specimens are much 
smaller, the pleura are predominantly brown 
to black, and the genital structures are dif- 
ferently developed (Figs. 9a, la). 
A moderately small species, somewhat vari- 
able in size. Antennae 9-segmented in male, 
1 1 in female, entirely black except for a rufous 
tinge at apices of basal segments. Ocellar 
tubercle large and conspicuous. Thorax en- 
tirely rufous on the dorsum and on the lower 
portion of the pleura. Upper half of pleura 
dark brown to black. Stems of halteres yellow, 
knobs brown. Legs brown to black, rather 
stout, segments straight. Wings light brown 
fumose, darker along the costa, stigma not 
darker than the membrane. Vein R2+3 arises 
just slightly before the middle of the distance 
from r-m to the wing margin, is about equal 
in length to r-m and nearly vertical in position. 
Ninth tergum with a U-shaped cleft in middle 
of hind margin, hind margin and postero- 
