1364 
DIPTERA OF AUSTRALIA, 
The generic diagnoses hereafter given are necessarily incomplete, 
since the works of authors subsequent to Macquart, containing 
these in a more detailed and improved form are not at hand for 
reference, if indeed in the country. Therefore, without general- 
izing on the strength of the meagre and local material at my 
disposal, I have been compelled to adopt the only alternative, to 
minutely describe individual species, and ))oint out some of the 
apparent discrepancies in the old descriptions. 
SIMULID^. 
Genus 1. SiMULiUM, Latr. 
Simulitim, Latreille, Hist. Nat. Crus, et Ins. XIV. 1804, 
p. 294; Meigen, Syst. Beschr. I. 1818, p. 289; Macquart, 
S. a B. Dipt. I. 1834, p. 173, etc. 
“ Fourth joint of the palpi a little elongated and slender. 
Antenme cylindrical, 11-jointed; the two first joints separated 
from the others. Eyes lound. Ocelli wanting. First joint of 
the tarsi as long as the others taken together. Wings very 
broad ; basal and marginal cells very narrow.” 
Obs . — There are only four joints to the palpi. In the following- 
species it will be seen from the description that the palpi differ 
from those of S. trifasciatum, Curt., (Brit. Ent. XVI. 1839, 
p. 765), and Meigen’s description, particularly in the length of the 
last joint. Latreille, Meigen, Macquart, and Curtis, in theii' 
diagnoses of this genus, all describe the antennaj as composed of 
11 joints, and Meigen and Curtis have both illustrated this by 
figures, but in the following, which is a peculiar exception in this 
respect, the number is only 2 + 8 joints. The number of 
abdominal segments is eight, the last one small. 
This genus is known from many parts of the world, and occurs 
in all climates. The insects are generally known by the name of 
“ sand-flies,” and being provided with a fully developed mouth. 
