BY R. J. TILLYARD. 



299 



of a circular shape, situated along the costal border in the region 

 of the humeral lobe, this latter being only a slight prominence. 

 Comparing these with the bases of insertion of neighbouring 

 scales (sc), I found that they were of very much greater size, as 

 well as of more regular shape. It was evident, therefore, that 

 they were not the bases of either typical scales or of hairs, but 

 that they must belong to a series 

 of strong bristJpx, which had been 

 removed during the process of 

 descaling. This led me to infer 

 the presence of a true Jrenuhi 

 in this family. 



The next step was to examine 

 set specimens from the underside, 

 under a fairly high power of the 

 microscope. To do this, I clipped 

 off the pin close to the underside 

 of the thorax, and then inserted 

 the head of the pin into a piece 

 of indiarubber, so that the moth 

 was exposed ventral side upper- 

 most. By this means the lens 

 could be brought close down upon 

 the wings, without touching the 

 pin. Text-%.10." 



The immediate result of this examination was the discovery of 

 a set of strong bristles, nearly always three ov four in number, 

 more rarely two, five, or six, constituting a trufi frenuJum, but 

 directed outwards and upwards at a very slight inclination to 



" Wing-coupling apparatus in Sahatinca inronnrueJla Walk., (New Zea- 

 land, fam. Micropterygicht') : a, base of dorsum of forewing in ? , viewed 

 from beneath; { x 88): J>, base of costa of hinrlwing in ? (descaled); ( x 83): 

 c, portion of the same enlarged, to show insertions of frenular bristles 

 [h.fr.) and insertions of scales (.sf.) from a part of the same wing for com- 

 parison; ( x 320): d, bases of wings in 6, the forewing viewed from 

 beneath, the hindwing from above; ( x83): fr, frenulum; Id, humeral lobe; 

 jl, jugal lobe. {Cf. Plate xxix., figs. 1-4). 



b.fr 



