4bU MESOZOIC INSECTS OP QUEENSLAND, IX., 



pression is that of a left tegmen, of ■which both obverse and reverse are pre- 

 served; the latter is the better impression of the two. 



Type, Specimen No. 98a (reverse) in Coll. Queensland Geol. Survey, 

 Brisbane. 



Horizon, Upper Triassic, Ipswich, Q. 



Genus Chili ocycla Till. 



TiUyard, Proe. Linn. Soc. N.S.W.. xliv., pt. 4, 1919 (1920), p. 868. 

 Genotype, Chiliocycla scolopoides Till. (I.e., p. 869). 



Chilioctcla scolopoides Till. (Plate liii., flg. 37; Text-flg. 79.) 



Specimen No. 327a is a second example of this interesting tegmen, more com- 

 plete basally than the type, but with the clavus missing, and the sculpture much 

 more poorly preserved. Combining the two tegmina, it is possible to offer a re- 

 construction of the tegmen as shown in Text-fig. 79, the very strong sculpture of 

 flat circular tubercles, covering all except the distal end of the teg-men, being 

 omitted. The new specimen shows very clearly the excessively strongly built 

 costal border basally, and the short Sc connecting with it. The restoration of the 

 clavus is purely provisional. 



Types: Holotype, Specimen No. 158a ; heautotype, Spec. No. 327a, in Coll. 

 Queensland Geol. Survey, Brisbane. 



Horizon, Upper Triassic, Ipswich, Q. 



Genus Polycttella, n.g. (Plate liii., flg. 36.) 



Tegmen of rather long, narrow shape, strongly sculptured all over with a 

 meshwork of raised polygonal cellules, somewhat resembling the flattened tubercles 

 of Chiliocycla, but placed more closely together. Only four main veins between 

 the costa and the vena dividens, viz., Sc, E, M and Cui. These radiate out from 

 near the base of the wing, and run almost straight to the wing-margin, without 

 any branches. Sc very short; R ends up about half-way along the curved costal 

 margin, M near apex, and Cui well below apex. Cu2 (vena dividens) runs 

 straight to a little beyond half-way along posterior margin of wing. Clavus 

 (partially missing) apparently rather narrow, the courses of the anal veins not 

 preserved. 



Genotype, Polyci/tella triassica, n.sp. (Upper Triassic, Ipswich). 



POLYCVTELLA TRIASSICA, n.sp. (Plate liii., flg. 36.) 



Total length of fragment, 7.5 mm., representing a tegmen of about 8.5 mm. 

 in length. The costal margin is not very well preserved, except at the extreme 

 base, where there may also be seen a short, slender vein, probably a much short- 

 ened Sc, separated from the costa by a single row of cellules. Between Sc and 

 R there are three rows of cellules, somewhat irregularly arranged. The number 

 of rows of cellules between R, M, Cui and Cu2, respectively, increases in each 

 case from the base outwards from one or two up to six or seven rows, and the 

 individual cellules become somewhat larger distally. The distal two-fifths of the 

 costa and the whole of the apical margin to a little below the end of Cui are 

 missing, as is also most of the clavus. 



Type, Specimen No. 81a, and paratype No. 154 (poorly preserved), in 

 Coll. Queensland Geol. Survey, Brisbane. 



Horizon, Upper Triassic, Ipswich, Q. 



