\ 



Mr. R. S. Bagnall on neio Tliysanoptera, 



595 



Tetracantliothrips horneensis, sp. n. 



(^ . — Lengtli about 1*6 mm. 



Dark bro\vtiish-l)l:ifk, sliiiiint^; pterotliornx merlianly in 

 form of an inverted triangle light yiillowi.sh-browii ; head 

 not so dark as |)rothorax; the two basal antemial joints (rest 

 broken off in the unique specimen) yellow. Fore-legs 

 yellow to yellowish-brown, 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 |>rothorax longer than the length of the prothorax 

 through middle. Wings short, vestigial. Abdomen broadly 

 ovate ; segments strongly transverse. Tube not quite so 



Fig. 2. 



Tetracimthrothrips borneensif!, jren. et sp. n. Head, pronotum, fore-coxfe 

 aud front of uiesonotum. 



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. Matang, 

 December 1913 {G. E. Biya.d). 



AUuthrips caudatas, sp. n. 



(J . — Forma macroptera. 



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



Yellowisii- to grejish-brown ; head and pterothorax 

 yellowish mediaidy. Abdomen dark grey to black-l)rown ; 

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

 shaded to grey-brown ; outer margin of femora daikest ; 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 



