750 



PERMIAN AND TRIASSIC INSECTS FROM N.S.W. 



consider of sufficient interest to name, placing them only pro- 

 visionally in families to which they may possibly belong. 



Family HYDROPHILTD^(?). 



Genus A d e m o s y n e Handlirsch. 

 Ademosynk wianamatiensis, n.sp. (Text-fig. 12). 

 Total leuyth of elytron, i'bYnm.; greatest breadth 1-5 mm. Shape 

 elongate-oval, closely similar to that of A punctata Tillyardj 

 from the Ipswich beds. Sculpture: nine longitudinal striae 

 carrying very fine, closely-set punctures, and separated by smooth 

 interstices of slightly greater width than the striae. The suture 

 is well-marked, and is not straight, but slightly waved, as in the 

 type species, A. major Handlirsch, from Ipswich. 

 Type, Specimen No. 10 in Coll. Mitchell. 



Locality: Narellan, near Campbelltown, N.S.W. Not 



taken from the same 

 locality as the other 

 Wianamattafossils here 

 described, but from an 

 horizon some three or 

 Te t-fiff 1'^ ^^"^ hundred feet high- 



Ademosyne wianamattensis, n.sp., elytron er, i.e., about 700 feet 

 (length 4 '5 mm.). Narellan; Triassic. above the top of the 



Hawkesbury Sandstone. The specimen is preserved in a soft, 

 yellowish mudstone, and is remarkable for its state of preserva- 

 tion. A portion of tlie base of the elytron has peeled away, 

 leaving only a faint impression on the rock; but all the rest, in- 

 cluding the whole of the apical half, and nearly all the margin 

 up to the base, shows the original elytron in jwsition, darkly 

 coloured, and exhibiting a peculiar kind of iridescence. It 

 would thus appear that this elytron has been preserved almost 

 without change of the chitin of which it is composed, as is often 

 the case in Tertiary fossils, but, as far as I know, never before 

 recorded for Mesozoic fossils of this kind. I think the explana- 

 tion lies in the type of rock in which it is embedded, which may 

 be particularly suitable for the preservation of chitinous objects. 

 This fossil is closely allied to A. pu7ictata TiWyard, irom the 

 Ipswich beds, from which it differs in its slightly greater length 



