NEW GENERA AND SPECIES OF A.USTRALIAN THYSANOVTEBA—nOOT). 137 



Aiitennal segments : 12 3 4 5 



Length (^i) 54 72 84 76 69 



Width (ix) 45 33 31 33 29 



Total length of antenna, 0-500 mm. 



Described from one female taken by sweeping in forest at Pentland, N.Q., 

 December 26, 1912, by Mr. A. A. Girault. 



LIOTHRIPS BREVIDENS sp. nov. 



Fenmle {nuicropterous). — Length about 1-4 mm. Colour dark blacki.sh brown, 

 with tarsi, distal ends of fore tibiae, and basal portions of antennal segments 3-5, 

 yellow ; -wings clear. 



Head very slightly wider than long, entire dorsal surface deeply and distinctly 

 reticulate with anastomosing lines ; cheeks strongly converging to eyes, nearly 

 parallel posteriorly ; vertex not or only very shghtly produced, anterior margin 

 nearlj' straight and vertical ; postocular bristles short, dark in colour, capitate, half 

 as long as eyes. E.yes nearly 0-4 as long as head, not at all protruding, slightly nar- 

 rower than their interval ; ventral length about five-sevenths of dorsal, ventral ^^•idth 

 a little less than half of ventral interval. Anterior ocellus slightly overhanging, directed 

 forward. Antennae of nearly normal structure, nearly twice as long as head, segments 

 7 and 8 compactly united to form a single mass, 8 short, about 1-7 times as long as 

 wide ; sense-cones disj)osed as usual in the genus ; segments 1, 2, 7, and 8 concolourous 

 with head. 2 paler at apex ; 3 yellow, lightly infuscate distally ; 4 and 5 brown, 

 yellow in basal third, 6-8 blackish brown. Mouth-cone pointed, with sides straight, 

 attaining base of prosternum. 



Prothorax about 0-64 as long as head and (inclusive of coxae) about 2-5 times 

 as wide as long ; j^ronotum smooth at middle, margins with strong anastomosing 

 lines ; median thickening short and indistinct ; all usual bristles present, short, 

 stout, capitate, dark in colour, subequal in length, and half as long as eye. Wings 

 broad, colourless, except at extreme base ; fore pair with about nine accessory hairs 

 on j)osterior margin and with the three subbasai bristles capitate. Fore tarsus with 

 slightly hooked tooth about one-third as long as width of tarsus. 



Abdomen of normal form and structure. Tube about three-fourths as long as 

 head, sides straight. Abdominal bristles rather short, brownish, capitate, those on 

 segment 9 half as long as tube ; terminal bristles about 0-8 as long as tube. 



Measurements of holotype : — Length 1-42 mm. ; head, length 0-198 mm., width 

 0-211 mm. ; prothorax, length 0-126 mm., width (inclu.sive of coxae) 0-316 mm. ; 

 pterothorax, width 0-336 mm. ; abdomen, width 0-408 mm. ; tube, length 0-150 mru., 

 width at base 0-075 mm., at apex 0-034 mm. 



Antennal segments : 12345678 



Length (/x) 48 54 60 58 51 48 45 27 



\Vidth (/x) 36 31 27 31 30 32 29 16 



Total length of antenna, 0-391 mm. 



