Mr. R. S. Bagnall on new Thysanoptera. 593 



setose. Legs almost ;is in the previously described species, 

 but with more minute setse, and the series of setas on inner 

 side of hind tibi8e shorter and stouter and starting at about 

 the middle. Pterothorax huge, at least 1-6 times as broad 

 as the prothorax and but slightly longer than broad; disc 

 faintly reticulated. Wings reaching to eighth abdominal 

 segment; set^e of fore-wing short, stout, and very dark. 

 Costa, upper and lower vein furnished with approximately 

 38, 28 (3 + 7 + 18), and 23 .«et£e respectively, upper fringes 

 sparse, lower wavy. Abdomen elongate, narrower than 

 the pterothorax, with sides subparallel to segment 6, 

 thence faintly narrowing to 8 ; 9 and 10 together obconical, 

 and the latter open dorsally ; bristles on 9 and 10 long. 



A fine, richly coloured species. 



Hab. W.Australia; taken by Professor E. B. PouUon 

 from the flowers of a small ylcacm-tree (probably A. baileyann, 

 F. V. Miill.). Mundaring Weir, Darling Range, Perth, 

 Aug. 3rd, 1914 (tube 16), and from the flowers of Acacia 

 jmlcheUa^ R. Br., Cottesloe Beach, near Fremautle, Aug. 31st, 

 1914 (tube 26). 



b. BagnaJUa type. 



Isoneurothrips ortentalis, sp. n. 



9 . — Lengtii approximately 1'4 mm. 



Colour dark blackish-brown ; fore-femora lighter brown, 

 with tibise yellowish, shaded to brown at margins ; inter- 

 mediate tibise somewhat lighter distally. Antennal joint 3 

 yellowish-white, tinged with grey to a light brown, 4 greyish- 

 white at base and 5 to 7 entirely brown. Head about 0'8o 

 as long as broad, surface transversely striate ; eyes mode- 

 rately largely facetted, pilose. Ocelli large, placed well 

 back, and posterior pair touching the inner margin of eyes. 

 Antennse 2*2 times as long as the head, joints 4 to 7 slender, 

 3 and 4 constricted near apex ; approximate length and 

 breadth of 3 to 7 as follows : — 



18 : 19 : 14 : 18 : 5 

 6:7:5:5:2* 



Prothorax quadrate, scarcely longer than the head ; 1*5 times 

 as broad as long. Setas at hind angles long, 0*5 as long as 

 the pronotum. Legs much as in /. australis. Wings grey- 

 brown, setae longer and more slender than in /. australis. 

 Abdomen long and linear. 



Ann. tfc Mag. N. Hist. Ser. 8. Vol. xv. 40 



