764 STUDIES IN AUSTRALIAN NEUROPTERA, vi., 



(A full account of the egg, larva, and pupa will be given in 

 dealing with the Life-History of Psychojwis elegans Guer., which 

 will form the next of this series of Studies). 



Distribution: Australia (but not Tasmania), South Africa, 

 Burma, Thibet, and China; suggesting a Gondwanaland origin 

 for the family Close relatives of the family were present in the 

 Trias of Ipswich, Q. 



The Fsychopsidft" are at once distinguished from all other Plani- 

 pennia by their shortened antennae, the joints of w^hich remain 

 distinct and similar, and by their remarkable wing-structure, in 

 which the most striking characters are the great enlargement of 

 the costal area, with formation of the connecting costal cross- 

 veins; the strengthening of Sc, R, and Rs to form the i'>ena 

 triplica, supported by cross-veins between them; the strong dif- 

 ferentiation betw^een the vena triplica and the parts of Sc, R, and 

 Rs lying beyond the anastomosis; the formation of the anasto- 

 mosis by interpolation of two small cross-veins; and the great 

 abundance and closeness of the branches of Rs. 



As regards the definitions of the four Australian genera, I give 

 herewith Navas' key to them (13, p. 188), translated from the 

 original Spanish: — 



'Forewing with four transverse series of gradate veinlets, three 

 in the disc and one the external continuation of the costal 

 series; hindwing with only three such series, two discal and 

 the external one which continues that of the costal field par- 

 allel to the external margin of the wing. ... 1. Psychopsis Newman. 



Forewing with only three series of transverse veinlets 2. 



'Both wings with three series of gradate veinlets, two in the disc 

 between the radial sector and procubitus ( = M), and the ex- 

 ternal one which is continuous in a curve with that of the 

 costal field 2. Arteriopteryx Gu6r. 



.Hindwing with two or one series of gradate veinlets 3. 



I ''Three transverse series of gradate veinlets, very distinct and 

 complete, in forewing; only two in hindwing... 3. Wernzia Navas. 

 ^.i; - Disc of forewing with two complete series of gradate veinlets, 

 at times a trace of a third in continuation of the costal series; 

 \ hindwing with only one 4. Maoallanes Nav^as. 



According to Navas, the arrangement of the gradate series 



(1) 



(2) 



