DIPTER^ OF AUSTRALIA. 
i 
By Feedekick A. A. Skuse. 
Part IV.— THE SIMULID^ AND BIBIONID^E. 
(Plate XXXIX.) 
The families Simulidfe and Bibionidie conclude the first sub- 
division of the Nematocera ; the former contains only the single 
genus Simulium, Latr., while the latter embraces several genera 
distributed amongst the four groups — Bibioninse, Hesperinse, 
Lobogastrinse, and Scatopsinse. All the known Australian 
Bibionidse are referable to the first and last of these. Judging 
from the material before me, neither of these families appears 
well represented in this country, but it is more than probable 
that the number of exponents known to me is very far from 
exhaustive. Eleven species of Bibio stand recorded from Aus- 
tralia, but the descriptions of six of these — five by Macquart and 
one by Jsennicke — are unfortunately not accessible to me at 
present 3 four of the remaining five are certainly only different 
names for the same species ; while the fifth, that of B. suhstitutus. 
Walk., is much too vague to be of much service for identification. 
U. imitator is widely distributed in Australia, and it occurs also 
in New Zealand ; but I have .seen no other species of this genus 
in the country. In B. fulvipennis, Macquart has described the 
male, and in B. rujicoxia the female of B. imitator, characterised 
by Walker in 1835. B. heHoscops, Schiner, is identical with the 
male of the latter species. Plecia dimidiata and Diloplms 
lomjiroHtrin, Maccj., both of which are now re-described, complete 
the sum of the hitherto known Australian Bibionidai. To these I 
add descriptions of three very distinct species of Phcia, one of 
Dilophus, and two of Scatopse. 
