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PACIFIC SCIENCE, Vol. XII, July, 1958 
not truncate. The ninth sternum is about as 
wide as long, each posterior lateral margin is 
produced into three lobes at apex (seen in end 
view or slightly tilted ventral view). The pos- 
terior median margin is strongly produced into 
a broad, heavily sclerotized, bilobed (indis- 
tinctly trilobed and with each of the lateral 
lobes slightly divided subapically) process. 
The claspers are small, inconspicuous, rounded 
at apices; fused with the median process of 
the sternum and extending about half its 
length (Fig. 13 b, c). The development of the 
ninth sternum and claspers of bakeri is very 
different, as shown in Figure 3 a. 
Length: Body, 5. 7-6.0 mm.; wings, 6.0- 
6.4 mm. 
type locality: Sumatra. 
The type probably has been lost. 
The species is common in Sumatra (and 
probably all of Indonesia) and the Philippine 
Islands; I have seen it from a number of 
localities in both areas. Records from India, 
Australia, China, Japan, Formosa, etc., are 
probably errors. Ouchi (1940, Jour. Shanghai 
Sci. Inst., Sec. Ill, 4: 294) misspelled this 
' 'fluviollis. Brunetti (1912, Fauna of British 
India, Diptera Nematocera, p. 163) was ob- 
viously in error in recording this from India 
and in considering P. thoracica Guerin as a 
synonym. 
Plecia fumida Edwards 
Plecia fumida Edwards, 1933, Jour. Fed. Malay 
States Mus. 17: 244. 
An entirely dull-black species fitting close 
to P. furva Hardy but with square-tipped 
claspers. The ninth tergum is deeply cleft on 
the hind margin, nearly divided into two large, 
triangular shaped, lobes. The posterior lateral 
margins of the ninth sternum are produced, 
rather pointed, extending beyond apices of 
lobes of tergum. 
Length: Body, 5. 0-6. 5 mm.; wings, 6.5- 
9.0 mm. 
The species has not been figured. 
type locality: Tenompok Pass, Borneo. 
Type in the British Museum (Natural 
History) . 
Known only from Borneo. 
Plecia fumidula Edwards 
Plecia fumidula Edwards, 1933, Jour. Fed. 
Malay States Mus. 17: 244. 
An entirely black species resembling P. 
fumida Edwards but much smaller and with 
quite different genitalia. It is related to P. 
furva Hardy but differentiated by having the 
lobes of the ninth sternum extending well be- 
yond the apices of the tergum, the tergum ex- 
tends only about two-thirds the length of the 
sternum. The ninth sternum is not so deeply 
cleft as in furva , the submedian lobes on the 
hind margin are much more slender and the 
claspers are comparatively small and each has 
a sharp pointed subapical lobe on the inner 
margin. (Refer to description of the genitalia 
and fig. 2a, b, Hardy, 1952, Beitr. z. Ent. 
2: 428.) 
Length: Body and wings, 3. 5-5. 5 mm. 
TYPE LOCALITY: Mt. Kinabalu, Borneo. 
Type in the British Museum (Natural 
History). 
Known only from Borneo; I have studied 
the type and type series in the British Museum. 
Plecia fumidula diver sa n. sub. sp. 
Fig. lAa, b 
Specimens on hand from New Britain seem 
to fit P. fumidula Edwards in all respects ex- 
cept that the thorax is entirely orange to 
rufous, except for the brown to black pro- 
pleura; rather than the body all black as in the 
typical form. I see no significant differences in 
the male genitalia and feel that in spite of a 
few minor differences which I see in the speci- 
men at hand and the drawings I made of a co- 
type of fumidula (Hardy, 1952, Beitr. z. Ent. 
2: 428, fig. 2a, b) this should be treated as a 
subspecies. Perhaps more significant differ- 
ences will be found when a series is studied. 
The antennae of the male are all black and 
made up of 9 distinct segments. In the female 
