226 Records of the S.A. Museum 



■ Family TANYDERIDAE. 



TANYDERUS Philippi, 1865. 



The genus TamjdeniH iii('lucles'('i<iht descrilxMl six'cics, of which four are from 

 the Australasian Region, althougli none had previously been discovered in 

 Australia or Tasmania. The distinctions hdween Tdiiudo-iis and Protoplasa 

 become less clearly defined with the const ani jicccssioii of ik-av forms, and it may 

 become necessary to unite the two geiiern. In tliis hitter case, the family name 

 would become Macrochilidae oi- Protophisichic. 



TANYDERUS AUSTRALIENSIS sp. nov. 



Mouth-parts much longer than the head; antennae with fifteen segments; 

 general colouration dark brown; wings hyaline with three dark brown cross- 

 bands; veins conspicuously hairy; a supennnnerary cross-vein in cell R**. 

 9 Length, about 9 mm.; wing, 11 nnn. ; rostrum alone, 1-4 nnn. 



Mouth-parts conspicuous, produced into elongate stylets that are about twice 

 as long as the head ; palpi dark brown, ehnigate, subtending the blade-like parts. 

 Antennae with only fifteen segments; scapal segments dark broAvn; flagellar 

 segments cylindrical, gradually decreasing in length from the basal to the ter- 

 minal ; verticils inconspicuous, those on the terminal segments slightly longer. 

 Front slightly produced, dark brown, sparsely pruinose; vertex black, grey 

 pruinose. Pronotum short, as in T. heckeri Riedel. Mesothorax discoloured, 

 brown, the median area of the praescutum darker brown. Pleura brown, indis- 

 tinctly variegated with darker. Halteres yellow, the knobs abruptly dark brown. 

 Legs with the coxae and trochanters dark brown ; femora yellow, the tips broadly 

 dark brown ; tibiae brownish-yellow, the extreme bases and tips dark brown ; 

 tarsi light reddish-brown ; legs short .and comparatively hairy. Wings hj'aliue 

 with three broad dark brown cross-bands; one basal; the second occupying the 

 general level of the cord; the third band occupies the wing-apex; the basal area 

 extends to the origin of Rs and to about one-third the length of cell second A, 

 there being a quadrate hyaline area in cell R near the base; the second area is 

 broadest at the anterior margin, extending very obliquely basad to include the 

 apical third of cell second A; there are small hyaline areas along the costal 

 margin of this l)and in cells C and Sc, before and just beyond the union of Sc- 

 witli R; the third or apical band includes thi' outer ends of cells Sc^ and R^ ; all 

 but a small basal portion of R- ; tiie outer tliird of \P ; the outer two-fifths of R*, 

 this latter, however, interrupted by a conspicuous rectangular hyaline area before 

 the end of the cell; more than the tlistal half of cell R'' is darkened; the outer 

 ends of cells first M-, M^ and Cu^ are darkened, and all of cells M^ and second M- 



