312 STUt)lES IN AUSTRALIAN NtUROPTERA, iv., 



bet-vveen the origin of the basal sector and the connoutiug ciuss- 

 ^ein. llindivivfi hyaline, a touch of pale brown on stigma. 



Type in Coll. Tillyard, received by exchange from Queens- 

 land Agricultural Department; label "F. P. Dodd, Toowong, 

 Brisbane, " no date. 



This species can lie separated from C. mujustus, not only by 

 its broader wings, but also by the position of the brown shading 

 of the forewings, which, in the latter species, is darkest on the 

 hindmargin and at the apex; also the black streak on K is not 

 present in C angudvt!. C. pidchMnti is a very distinct and 

 clearly-marked species, which could not be mistaken, although 

 there seems to be a considerable amount of variation in the shape 

 and extent of the markings. I figure, in Plate xvi., fig. 25, a 

 specimen in my Collection from Brisbane, whicli evidently belongs 

 to this species. 



Family SISYKID^. (Plate xvi., tigs.26, 27; Text-fig.9). 



Small insects witli a general resemblance to Ifnnerubiidfe. 

 Sc and R distinctly J'vscd distal ly. Ovly otw. radial sfclor in 

 Jhre/vinijs. M unbranched in forewings, branched in hind wings. 

 Original archaic Cu. present in both wings, c/(/' being close to 

 base of wings. Hindwing with a single false origin to Us, ihe 

 basal remnant of Rs attached to INI. A weak coupling-apiiaratus 

 may be present. Costal space of forewings not strongly broad- 

 ened, and not carrying either a recurrent veinlet or forked cross- 

 veins. No unspecialised cross-veins. 



Larva with peculiar specialised hair-like mouth-parts; lives on 

 freshwater sponges. 



As is generally recognised at present, the Sisyridc owe their 

 resemblance to llemerobiidoi not to any close phyletic relation- 

 ship, but rather to convergence by i-eduction. They must be 

 regarded as a highly reduced offshoot from the ancient semi- 

 acjuatic Osmylidre. The marks of Osmylid ancestry are the fusion 

 of Sc and R distally, and the single radial sector in the forewing; 

 while the peculiai- larval mouth-parts could only conceivably be 



