296 Miss G. Ricardo on the Pangonine 
Third joint of antennz simple, without a tooth 
or projecting angle. Hyes hairy. 
1. Pale yellow. Abdomen with posterior seg- 
ments darker. Wings clouded............ dimidiatus, 2, Wulp. 
Osten Sacken (Ann. Mus. Civ. Genova, xvi. p. 478) doubts 
this species being a true Szlvius. 
Australian Region. 
*§. marginatus, 9, Walker, List Dipt. pt. 1. p. 189 (1848) ( Tabanus).— 
Port Essington, Australia. 
#2 S§. nitescens, 6, Walker, Trans. Ent. Soc. London, iv. p. 125 (1857).— 
Australia. 
S. silvester, 2, Bergroth, Ent. Zeit. Stettin, lv. p. 71 (1894).—Central 
Queensland. 
1. Third joint of antenne simple, without a 
Loothvoryprojectineyangle cr. oiler orl: 2. 
Third joint of antenne produced to a sharp 
PHNAIS GH5 HONG) [DARD gas baoasnoonocsdance eb 
2. Grey. Abdomen black and grey with 
darker spots. Legsblack. Wingshyaline,  stlvester, 9, Bergroth. 
Grey. Abdomen with marks and spots. 
IDES UWA? basoenoccouscdc0d0090000 nitescens, 3, Walker. 
3. Brown. Legsreddish brown............ marginatus, 2, Walker. 
The description of S. silvester is not very explicit, es- 
pecially as regards the antennz, which are only mentioned 
as having the first annulation of the third joint wider at its 
base than the others. 
There is a large specimen of a female species from New 
Zealand, 81. 43 (Shelton), measuring 15 millim., for which 
perhaps a new genus may be required ; from the form of the 
antenne it would belong to Szvius, but the extremely stout 
spines on the hind tibiz, the rather short wings and long 
abdomen give it a very different appearance to the majority 
of Silvius species. In colour it is dull black, with grey 
pubescence, so that the abdomen appears greyish ; the wings 
are hyaline with a short appendix ; the legs are short and 
stout, reddish in colour. 
Sylvius marginatus, °, Walker. 
Two females in poor preservation—the type from N. or 
N.W. coast of Australia (pres. Haslar Hospital), 44. 4; the 
other from Port Essington, 42.1: they were incorrectly placed 
under Tabanus by Walker. The frontal stripe is dark 
brown ; ocelli are present. The palpi are two thirds the 
length of the proboscis. ‘The antennz have the first annu- 
jJation of the third joint broad and large, produced at its 
base to an angle. 
