306 STUDIES IK AUSTRALIAN IfHUIlOPTERA, iv., 



T y p e in Coll. Tillyard. Unique. 



This very striking insect was taken by Mr. J. C. Bridwell, of 

 Honolulu, on .September 1 2th, 1915, Avhile collecting with nie at 

 Kedron Brook, Brisbane. It was beaten out of a small wattle- 

 tree whose foliage was completely covered, and almost destroyed, 

 by a small species of Psyllid. 



Genus PsYCHOBI^:LLA Banks. (Plate x v., fig. 21). 

 Banks (1; p. 7 9). 



Atifrinui' quite two-thirds as long as forewings. U'itufs ^ell 

 rounded at tips. Forewing with three radial sectors, two arising 

 close together near middle of R, and the third close to the base, 

 just distad from M; this last gives off an anterior branch, strongly 

 arched upwards: the middle sector is simple, the most distal 

 sector many-branched. Costal space of forewing broad near 

 base, the recurrent veinlet present, with a number of forked 

 branches. Two gradate series in both wings, the outer veiy 

 long and running nearly parallel with the wing-margin, the inner 

 with much fewer cross- veins. //Indwiug with two well-developed 

 false origins to Hs; Cu.j absent, Cu,^ fairly well formed, but not 

 diverging strongly from Cu,^ at en/". 

 G e n o t y p e, Ps. sordida Banks. 



The genus is a \erv tlistinct one, but may be considered as a 

 rather specialised derivative from Mcffa/omina, in which the 

 number of radial sectors in the forewing is reduced from four to 

 three, by the shifting i)f the origin of the second sector from the 

 base on to the stem of the most basal one. This gives, as a fixed 

 generic condition, the arrangement which occurs as a frequent 

 variation in Drepaiiacra, as shown in Text-fig. 6, />. 



There are two closely allied species, which may be distinguished 

 as follows: — 

 Furewiugn bruwii. Mith reddish s(ij,'ma; liindwiii^'s with throi- 



branches tu Rs; middk' tihiii' fusit'oriti /*••<. iordid't Banks. 



Forewings fuscous, stigma dull brown ; hindwings with five 

 branches to Rs; all the tibise slightly fusifoi'iii, those of hind- 

 legs elongated and s(jniewhat flattened P?. J'nsca, n. sp. 



