BY R. J. TILLYARD. 125 



Plutellidce in the venation of its forewing. Like those of all 

 other Heteroneura, these scales are devoid of coarsened strife; 

 but they show a kind of thickened stalk nasally, such as may 

 also be found in the Oecophoridc? and other families. The longi- 

 tudinal strife are very numerous and close together, and the 

 cross-striolation very marked. The scales of most Heteroneura 

 are scalloped or deeply angulated along the distal margin: a 

 marked exception to this rule is the archaic family Cossidre, in 

 which scalloping is never found. 



Section iii. The Wing-coupling Apparatus. 



In Part i. of my paper on the Panorpoid Complex (9, p. 298, 

 Text-fig.10; Plate xxix., figs. 1-3) I dealt with the wing-coupling 

 apparatus of the M icropteryyidce, and showed that it was of a 

 jugo-frenate type, there being both a jugal lobe on the forewing 

 and a distinct frenulum on the hind. 



The conclusions arrived at in that paper were based for the 

 most part on the study of New Zealand material, consisting of 

 species of the genera Saba tinea and Mnesarchcea, and also on a 

 long series of Micropteryx aruncella from Scotland. Of Mtie- 

 mouica, I had at the time only three specimens, and of Erio- 

 crauia two, all received from Mr. Meyrick. Of these, only one 

 specimen of each genus was sacrificed for the making of micro- 

 scopic preparations, the others being kept intact. 



In studying these preparations, I noticed that, of all the slides 

 prepared by me, that of Mnemonica appeared to be the only one 

 in which the jugal lobe was not doubled under the wing. As T 

 had made a special effort to get this lobe spread out on the slide, 

 I did not at the time attach much importance to this observa- 

 tion; particularly as, in the mounted wings of Briocraiiia, I 

 found the jugal lohe to be partly folded. However, on receipt 

 of Professor Comstock's recent work (3, pp. 314-6), it was at once 

 evident to me that the jugal lobe of the Eriocraitiiiut' was quite 

 different from that of Sabatinca and Microptpnjx Hence T 

 made a further study of the whole of my material, with the 

 result that I am now convinced that there are two very distinct 

 types of jugal lobe to be found within the M icropterytj idea . 



