Mr. R. S. Bagnall on new Thysanoptera, 595 



Tetracanthoilirips borneensts, sp. n. 



cJ . — Length about 1'6 min. 



Dark brownish-black, sliining; pterotliorax medianly in 

 form of an inverted triangle light yellowish-brown ; head 

 not so dark as prothorax; the two basal antennal joints (rest 

 broken off in the unique specimen) yellow. Fore-le<>-s 

 yellow to yellowisli-browu, with the femora shaded to brown 

 basally ; hind and intermediate legs darker, but yellowish 

 above knees. Tube brownish at apex. Fore-legs incrassate : 

 intermediate and hind-femora with some strong spines on the 

 upper margin near or beyond middle. Bristle at each hind 

 angle of prothorax longer than the length of the prothorax 

 through middle. Wings short, vestigial. Abdomen broadly 

 ovate ; segments strongly transverse. Tube not quite so 



Fi-. 2. 



Tetracanthrothrips bomeensh, p^en. et sp. n. Head, pronoturu, fore-cox« 

 and frout of mesoiiotum. 



long as the head. Abdominal hairs long; those on segment 9 

 as long as tube, and on 6 and 7 longer ; mostly dark, but 

 some on 8 and 9 practically colourless. 



Hab. W. Sarawak ; I brachypterous S , Mt. Matane- 

 December 1913 {G. E. Bryant). 



Alluthrips caudatuSj sp. n. 



(J . — Forma macroptera. 



Length about 2"3 mm. ; breadth of pterotliorax 0*45 ram. 



Yellowish- to greyish-brown ; head and pterothorax 

 yellowish medianly. Abdomen dark grey to black-brown ; 

 tube reddish, shaded with brown at apex. Fore-legs yellowish, 

 shaded to grey-brown ; outer margin of femora darkest ; hind 

 and intermediate femora dark grey-brown ; all tarsi yellow. 

 Antennal joint 3 yellow, tinged with grey distally ; 4 and 5 

 yellowish, shaded with grey-brown basally and distally ; 

 6 yellowish basally. Head large, as broad as long and nearly 



