Hood — Australian Thysanoptera. 89 



half, and extreme apex of segment 2, which is yellowish; wings lightly 

 clouded with brown along margins and at middle. 



Head about 1.4 times as long as greatest width, which is at extreme 

 posterior angles of eyes ; cheeks straight and converging to near base, where 

 the head is about 0.82 of the greatest width, thence very slightly diverging, 

 without distinct collar, faintly striate, and with about six distinct dark 

 spines visible in profile; vertex not at all produced; postocular bristles 

 pointed, half as long as head. Eyes small, less than 0.3 as long as head, 

 two-thirds as wide as their interval, subquadrangular as seen from above, 

 slightly protruding, longer and broader on dorsal surface than on ventral. 

 Anterior ocellus on a line with front margin of eyes and directed forward, 

 not overhanging; posterior ocelli situated in front of middle of eyes and 

 widely separated. Antennae formed as usual in the genus, 1.7 times as long 

 as head, the last two segments not closely united; segments 3 and 4 each 

 with a large sense cone at middle of ventral apical surface, 3 with an addi- 

 tional one on outer surface; 4 with three additional large ones on inner, 

 outer and upper surfaces, respectively, and also with a small slender one on 

 the inner, upper surface; 5 with a large sense cone on either side of apex 

 and two small ones on dorsum ; 6 with a large sense cone on inner surface of 

 apex and a small one on dorsum; 7 with a large one on dorsum near apex. 

 Mouth cone semicircularly rounded at apex and reaching half way across 

 prosternum, labrum not surpassing labium. 



Prothorax along median dorsal line less than half the length of head, 

 with distinct median thickening, surface smooth; all usual bristles present, 

 scarcely pointed, the two pairs near posterior angles longest but much 

 shorter than postoculars, the anterior marginals very small, all others (in- 

 cluding coxal) less than half as long as postoculars. Fore wings broad, 

 slightly dilated apically, and with about 20 accessory hairs; subbasal 

 bristles small, pale, and pointed, the basal one smallest, the others suc- 

 cessively larger. Fore tarsi with a short triangular tooth. 



Abdomen broad and heavy. Tube slightly longer than head and more 

 than three times as long as basal width, which is 2.3 times the apical, sides 

 straight. Bristles very long and pointed, yellow, those on segment 9 longer 

 than tube; terminal bristles brown and two-thirds as long as tube. 



Measurements of holotype (9): Length 2.28 mm.; head, length 0.362 

 mm., greatest width (across eyes) 0.260 mm., least width (at base) 0.212 

 mm.; eyes, length 0.098 mm., width 0.072 mm., interval 0.108 mm.; post- 

 ocular bristles, length 0.180 mm.; prothorax, length 0.172 mm., width (in- 

 clusive of coxee) 0.450 mm.; pterothorax, length 0.468 mm., width 0.492 

 mm.; abdomen, greatest width 0.594 mm.; tube, length 0.396 mm., width 

 at base 0.126 mm., at apex 0.054 mm. 



Antennal segments: 12345678 

 Length (/*) 66 78 98 108 96 71 51 46 



Width (fi) 51 39 39 41 37 34 27 18 



Total length of antennae, 0.614 mm. 



