528 PROCEEDINGS OF SECTION D. 
Fam. 2. ScIARID®. 
The typical genus Sciara, Meig., is represented by forty-two 
described species, and Z7ichosta, Winn., by one species, nearly all 
from New South Wales. Several species of .Sczava and one or 
two of Zygoneura, Meig., are known to me, but not yet charac- 
terised. Sciara seems to be generally diffused throughout all 
regions of the earth’s surface ; Zyonewra and Trichosia have been 
recorded from Europe and America. 
Undoubtedly this family is abundantly represented in Australia, 
but scarcely anything is known of the species outside New South 
Wales. See Proc. Linn. Soc. New South Wales, vol. ili. (Ser. 
2nd), 1888, pp. 657-724, pl. 11. 
Fam. 3. MycrToPrHILID®. 
The hitherto described species number thirty-five species 
apportioned to no less than sixteen genera. A/acrocera, Meig., 
three ; Cevoplatus, Bosc, one; Heteropterna, Sk., one ; Platyura, 
Meig., eight ; Psewdoplatyura, Sk., one; Antriadophila, Sk., four; 
Sciophila, Meig., one; Homaspis, Sk., one; Acrodicrania, Sk., 
three; Zeta, Meig., one; Aze/eca, Sk., one; Zrizsygia, Sk., one; 
Aphelomera, Sk., one ; Trichonta, Winn., two ; Mycetophila, Meig., 
two; and Brachydicrania, Sk., four. Of these, nine generic 
names, Heteropterna, Pseudoplatyura, Antriadophila, Homaspis, 
Acrodicrania, Ateleia, Trizygia, Aphelomera, and Brachydicrania 
have been proposed for peculiar Australian forms; the other 
genera are of more or less world-wide distribution. 
Since enumerating the species last year (Proc. Linn. Soc. New 
South Wales, vol. iii. (Ser. 2nd), 1888, pp. 1123-1220, pl. 31 and 
32), I have discovered several additional species. No estimate 
can be taken of the number of species inhabiting Australia, but 
the number must be very considerable. Very little is known of 
the species occurring outside New South Wales. 
Fam. 4. SIMULID. 
This family, containing only a single known genus of universal 
distribution, is represented in New South Wales by only a single 
described species, S. molestum, Sk. No others have been yet 
discovered. 
a 
Fam. 5. BIBIONIDA. 
Australia does not appear to be rich in Bibionide. Nine 
species of Aibz0, Geoff., are ascribed to this country, one of which 
is Bibio marci, Geoft., known commonly in Europe. I have only 
seen one species, B. zmitator, Walk., with which B. fulvipennis 
and B. ruficoxis, Macq., and LB. helioscops, Sch. are synonymous. 
