70 ARKIV FÖR ZOOLOGI. BAND 12. N:0 15. 



sharp ridge and a basal angular indentation, the rigbt one 

 with two large apical teeth and a smaller, more obtuse one 

 further below, at the base another still smaller and more 

 obtuse tooth; antenn^e 17-jointed, basal joint very long and 

 stout, 2nd not so broad and only slightly more tban half 

 so long, 3rd and 4th very sbort of about the same length, 

 the 3rd only slightly broader, 5th also short, but slightly 

 longer than the 4th, 6th to 9th gradually longer, lOth to 

 17th of very nearly the same length, hardly twice as long as 

 broad, the three apical joints not quite so broad as the 

 preceding ones, apical joint very narrow at the tip; palpi 

 very long and stout, apical joint not quite so broad as the 

 preceding joint a t the tip; prothorax very broad, though 

 not so broad as the head, emarginate in front, with a deep 



Text Fig. 35. a Antonna of soldier of Hamitertnes perniger Frogo. from 

 Dukes Dome in N. W. Australia. 

 b Prothorax of imago of Hamitertnes perniger Froqg. 



curved transversal impression behind the front margin, which 

 is distinctly raised up, with a median impressed line limited 

 backwards by a transversal impression just before the bind 

 margin; anterior angles rounded, sides tapering sharply 

 backwards, in the centre of the bind margin a fairly deep 

 excision, the whole upper surface covered Avith thick hairs; 

 meso- and metathorax with darker median line; wings very 

 long and broad, rounded at the tips, bind wing broader but 

 shorter than the forewing, light reddish ferrugineous, anterior, 

 two stout nervures running parallel out to the beginning of 

 the rounded tip, the second one broadly lined below with 

 reddish yellow; mediana of the före wing running through the 

 upper part of the wing, sending out a varying number of 

 nervures to the tip and the bind börder, generally four but 

 sometimes more, all forked at the tip or the 3rd unforked, 



