470 DRAGOXFLIES FROM AUSTRALIA AND TASMANIA, 



is highly cultivated, and very little of the rich scrub is now left. 

 The lo\ely Aryiolfst('s chryso'ides was found in only one locality, 

 where a patch of scrub, about one square mile in area, had been 

 left by an owner desirous of obtaining a higher price for it in the 

 future. Through this scrub, a beautiful little stream meandered. 

 A. chri/soides was practically confined to the small glade formed 

 by the approach of the track through the scrub to this stream on 

 either side — the only place in the scrub where there was any 

 clear sunlight. By working this glade every day, I obtained, in 

 the course of about a fortnight, nearly twenty males and ten 

 females of this rare species. I am now able to offer a description 

 of the female, which differs very markedly from the male in its 

 colour-pattern : — 



Total Ifnyfh, -41 ; ahdomen, 32; Jorewhiy, .30; hindu-iny, 29mm. 



Winys much longer than in male; postnodals 22-23 in forewing, 

 20-21 in hindwing; pferofttiyma black, 1"3 mm. in forewing. 



Colour-pattern ver}^ different from that of male, and more re- 

 sembling that of the female of A. cuuahi/i.^ Foerster. When 

 mature, the groundcolour is velvety^-black, with deep purplish 

 reflections on the abdomen; the markings are a rich red, the 

 pattern being that shown in Text-fig. 10c; all the rest of the ab- 

 domen not shown in this figure is black. 



For comparison, T have figured also the colour- pattern of the 

 male (Text-fig. 1 Or/,), and those of the male and female of A. 

 amabilis (\0b and lOd respectively). It will at once be seen that 

 the sexes diff'er much more markedly in A. chrysdides than the}^ 

 do in i4. amabilis. 



Types in Coll. Tillyard {g taken by Dr. A. J. Turner, at 

 Montville, October 6th, 1912: 9 taken by myself at Maleny, Oc- 

 tober 12th, 1915). 



Ilab. — Blackall Ranges, Queensland. October. Very rare. 



The changes in colouration in this species from emergence to 

 maturity are very remarkable. At emergence, all the parts 

 destined ultimately to become red are pure white in the male, 

 while, in the female, the}' are white with slight blackish cloudiness 

 encroaching from the black groundcolour on to the sides of the 



