BY R. J. TILLYARD. 



279 



nntil, at about liali'-way along the wing, it is joined to JI1-2 by the short cross- 

 vein r-m, closely resembling that of the forewing. The basal part of M is weakly 

 formed; it divides unilaterally into M1-2 above, continuing the course of M, and 

 M3-4 below; this latter vein proceeds obliquely downwards a very short distance, 

 and then divides into II3 and M4, the former running straiglit through the wing to 



/ / 



,.y' 



i <R.' 



Text-fig.70. — Mesogereon affiue, n.sp. Venation of hindwing. Missing portions 

 restored by broken lines. J'or lettering, see p. 284. (x 4J). 



the middle of the termen, the latter curving downwards to meet a sliort branch 

 from Cui (ni-eu), and then turning to run sub-parallel to and beneath M3 to the 

 termen. Cu is clearly mai'ked, and is joined to lA by means of a strong cross- 

 vein cu-a. What appears to be the true Cu2 is a weakly formed furrow-vein 

 arising just beyond the origin of m-cu, and soon becoming obsolescent; it fails 

 to reach more than half-way to the wing-border. Cui continues the line of Cu 

 with a slight bend downwards, and soon forks into Cui„ and Cuid, which diverge 

 to run straight to the wing-border. lA appears to be well developed; the rest 

 of the clavus is missing. Greatest length, 11 mm. greatest breadth, 9 mm., re- 

 presenting a wing of about 21 mm. total length by 11 mm. breadth. 



This wing is very finely pitted all over, each minute pit having been ap- 

 pai-ently the socket of a small hair. There are no cross-ridges on tne main veins. 



Type, Specimen No. 207a, in Coll. Queensland Geol. Survey, Brisbane, Q. 

 Type-counterpart , specimen No. 2076, in same collection. 



Mesogereon shbpherdi, n.sp. (Plate xx.. Fig. 23, and Text-tig. 71.) 



This species is represented by a hindwing only, complete except for the 

 alisence of the costal border, a small piece around the apex, the lower portion of 

 the termen, and most of the clavus. Greatest length, 21 mm., greatest breadth, 

 11 mm., the former representing practically the full length of the wing, the loUcr 

 indicating a total l)readth of about 13 mm. 



Structure and venation generally similar to those of the hindwing of 21/. 

 affine described above, but with the following differences : — R is connected with 

 M close to the base by a strong cross-vein, r-m. About half-way along the wing, 

 R is also connected with Sc by an oblique cross- vein, sc-r. Rs arises closer to 

 the base than in M. affine, but the cross-vein r-m which corresponds with that in 

 M. affine remains in the same position about half-way along the wing; conse- 

 quently the piece of Rs from origin to cross-vein is longer in M. shepherdi, and 



