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Scutellum with a narrow central white stripe and dark brown scales on 
either side. Coxae similar in colour to pleura clad with rather long fusiform 
silvery scales: all the legs clad with dark purple-brown scales. 
Abdomen .—Dark purple-brown dorsally, dirty-white below no lateral 
spots the line where the two colours meet is absolutely straight and 
unbroken. 
Male .—The abdomen is longer and more slender. The proboscis is 
clad on its ventral surface with yellow scales in all other respects the male 
resembles the female. The basal lobes of the genitalia are short and 
clad with golden-brown hairs. There is an inferior pair of claspers as in 
most of the males of this genus. 
Occurrence .—Described from two males and a series of females. 
Remarks .—-The female can hardly be mistaken for any of the other 
species the light reddish-brown thorax and pleurae the dull colour of the 
scaling of the abdomen and absence of all bands or lateral spots being 
peculiar to this species. The specimens were taken in the jungle at “The 
Gap” in the immediate neighbourhood of streams. 
Topomyia Gracilis, n. sp. 
Head with broad black racquet-shaped scales with rather square ends 
white vertical patch and small white lateral patches. Central w r hite 
thoracic stripe extending the whole length of thorax; small white spot on 
the scutellum of the female. Abdomen without lateral spots. 
Female Head .—Black scaled with a large semi-circular patch of pearly- 
white scales on the vertex and some white scales laterally; orbital and vertical 
bristles black. Basal joint of antenna black, without scales, remaining 
joints blackish-brown with black verticillate hairs. Palpi and proboscis 
black scaled. 
Thorax .—Prothoracic lobes with pearly-white elliptical scales on the 
postero-external surface. Mesonotum almost black with pearly-white central 
stripe of almost circular scales extending the whole length and dark brown 
narrow-curved scales over the rest of its surface which under a hand lens 
appear metallic-bronze. Scutellum dark brown with a few white scales 
on the central lobe and dark brown scales on either side of these and 
on the lateral lobes; bristles dark brown. Pleurae dark brown with broad 
white elliptical scales. Wings with dark brown scales the lateral narrow 
with rounded ends, the median also narrow and long but shorter than the 
lateral; fork cells of equal breadth, first longer than the second, its base 
nearer the wing base, its stem rather more than one-third the length of the 
cell; posterior cross vein one-and-half its own length from the median. 
Coxae ochraceous with silvery scales; femora silvery beneath; remainder of 
all legs clad with dark brown scales. 
Abdomen .—Dark brown above silvery below, without lateral spots or 
bands. 
Male .—Genitalia complex. Inferior claspers consist of a rounded rod 
of chitin with a truncated end and one long spine at right angles to it; there 
are no hairs on this portion. Besides a long falciform clasper attached to 
the inner side of the end of the basal lobes there is a golden-brown 
