428 Mr. Ambrose Quail on 



from the edge of wing membrane ; on the hind-wings 

 fringe scale 7 is less wide at the tip and shorter. 



These are the only wing scales I have been able to 

 determine in the genus Porina ; all are finely striate 

 longitudinally, none are dentate in the slightest degree. 

 I do not hesitate to believe the surface scale oi P. fiisco- 

 maculata (Fig. A G) is the most generalised — distinct from 

 hairs — in the Hc])icdidie. 



Wing scales are modified hairs. 



(PI. VI, figs. B 1— G.) In the Charagia group several 

 species are green, some have white spots {C. virescens), 

 others silvery metallic spots {G. eximia, C. ramsegi) ; the 

 scales of which they are composed are more specialised 

 tlian the true surface scales, the silvery scales being finely 

 striate, and an effect is produced similar to that of 

 " watered " ribbon. The true surface scales of C. virescens 

 are short and rounded on fore-wings (Fig. B 1), longer 

 pointed scales on hind-wings (Fig. B 2) not dissimilar to 

 but wider than the surftice scale of Porina fusconiaculatei. 

 The fringe scales of C. virescens fore and hind-wings are of 

 one pattern, short and broad (Fig. B 5), G. eximia agrees 

 with G. virescens. G. ramsegi has an additional fringe 

 scale longer (and forming an outer fringe) than the virescens 

 scale which forms an inner fringe. G. daphnandrie has 

 dark coloured spots, the green surface scales are longer, 

 and this species has longer fringe scales. G. lignivorus 

 has only partly green fore- wings, surface scales and fringe 

 scales as in virescens, and also a longer fringe scale almost 

 identical to Porina fringe scale (Fig. A 7). 



I observed some wing scales of worn specimens having 

 been damaged, a false dentation was produced in relation 

 to the striation ; a worn specimen of G. eximia had some 

 fringe scales with sharp angular corners (Fig. B G), and 

 some surface were damaged in a similar manner (Fig. B 4) ; 

 the dentation of these scales was dissimilar, and examin- 

 ation of a fresh specimen showed no such dentation of 

 wing scales. A worn specimen of C. lignivorus had some 

 damaged surface scales deceptively dentate (Fig. B 3). 



Wing scales of Charagia are striate longitudinally 

 without dentation. Fringe scales appear to be modified 

 surface scales in the He2nalid[&. 



(PI. VI, figs. C 2, 3.) Trictena lahyrinthica is an interest- 

 ing species, surface scales uniform elongate, but varying 



