BY R. J. TILLYARD. 781 



carries long, ciu-ved, wliitisli hairs. Veiitrally, these appendages 

 are separated by a broad, sliort, tiapezoidal inferior apj^endaye, 

 wliitish in colour (Plate Ixxvii., fig. 9;. 



Type, in Coll. Tiliyard. 



Ilah. — ^The specimen carries no label; but Mr. Gallard, from 

 whom I obtained it, informs me that he bred it from a larva 

 found near Gosford, N.S.W. 



At first sight, this species appears to resemble a small speci- 

 men of Ps. insolens. It may readily be separated from the latter 

 species by the much more delicate build, the much shorter and 

 narrower hindwings, with any markings on them, and the more 

 delicate, paler, narrower, and less strongly marked forewings. 



Relationships of the P s y c h o ]> s i d fH . 

 There can be little doubt that the nearest relatives of the 

 Psychopsidce are to be found in the Mesozoic Fossil families Pro- 

 hemerobiidm and Kalliyraminatidce. The formei', which verv 

 probable represent the original type of the Order Planipennia, 

 are known from the Upper Trias of Ipswich, Queensland, and 

 from the Lias and Upper Jurassic of Europe. The genus Proto- 

 psychopsia Tiliyard, appears to connect the Prohnmerobiidcp. with 

 the Psychojfsidce very closely. This relationship has since been 

 further emphasised by the discovery of a second fossil from these 

 beds, differing very little from Megapsychops illidyei itself. This 

 fossil will shortly be described by me in Part 5 of my "Mesozoic 

 Insects of Queensland." The differences between the Psychopsidce 

 and the Prohemerobiidce are simply those in which the formei- 

 family shows specialisation, viz., the enlargement of the costal 

 area, with development of a series of connecting cross-veins, the 

 formation of the vena triplica and anastomosis, and, very pro- 

 bably, the shortening of the antennae. In all known Prohemero- 

 biidce, the costal space is either quite narrow, or only moderately 

 wide, for its whole width, or only widened at the base; costal 

 veins are never developed: Sc, R, and Rs run close together, but 

 quite separate, to the apex of the wing, without being partially 

 strengthened and separated oft" to form a vena triplica, as in 

 Psychopsidce: cross-veins apj ear to be entirely absent from most 



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