Hood — Australian Thysanoptera. 77 



long bristles at posterior angles. Mesothorax about 1.36 times as wide as 

 prothorax and much wider than metathorax. Wings of fore pair with two 

 longitudinal veins reaching nearly to tip; anterior vein with three pale 

 bristles near base, four in the transverse brown band which occupies the 

 second fifth of the wing, and three or four widely separated ones beyond; 

 posterior vein with about eight bristles, which are more widely separated 

 toward apex of wing. 



Abdomen slender but distinctly wider than mesothorax, and sharply 

 conical, the last three segments successively shorter; posterior margin of 

 segment 8 pectinate; segment 10 divided above; bristles on 9 and 10 long, 

 dark in color, and prominent. 



Measurements of holotype (9): Length 1.03 mm.; head, length 0.122 

 mm., greatest, width 0.132 mm., least width 0.119 mm.; eyes, length 0.063 

 mm., width 0.036 mm., interval 0.056 mm.; prothorax, length 0.121 mm., 

 width 0.154 mm.; pterothorax, length 0.216 mm., width 0.209 mm.; fore 

 wings, length 0.648 mm., width at middle 0.047 mm., near base 0.066 

 mm.; abdomen, greatest width 0.240 mm.; segment 8, length 0,078 mm.; 

 segment 9, length 0.071 mm.; segment 10, length 0.060 mm. 



Antennal segments: 12 3 4 5 6 

 Length (/u) 21 33 39 34 34 46 



Width (m) 26 24 18 18 17 18 



Total length of antenna, 0.231 mm 



Described from one female taken by sweeping grass in a yard at Brooklyn, 

 New South Wales, November 7-18, 1914, by A. A. Girault. 



The yellow abdominal band occupying the third, fourth, and fifth seg- 

 ments and the dark prothorax enable this species to be distinguished at 

 once from closely allied forms. 



Haplothrips angustus, sp. nov. 



Female (macropterous) . — Length about 1.4 mm. Color blackish brown 

 with inner surface of fore tibiae, and all tarsi, yellow, lightly shaded with 

 brown; antennal segments 1, 2, and 5-8 dark blackish brown and con- 

 colorous with body, 3 light yellowish brown, 4 intermediate in color be- 

 tween 3 and 5, paler basally; wings clear, except the scale and the region 

 of the three subbasal bristles, which are brown. 



Head about 1.25 times as long as wide, sides distinctly arcuate and con- 

 verging to base, which is about 0.85 the width behind eyes; surface faintly 

 subreticulate and with a few minute spines; vertex swollen but not pro- 

 duced, the anterior ocellus slightly overhanging and nearly attaining front 

 margin of eyes ; postocular bristles blunt, one-seventh as long as head. Eyes 

 0.38 as long as head and two-thirds as wide as their interval. Antennas of 

 normal structure; segment 3 fully twice as long as wide, and without a 

 sense cone on inner surface; segment 4 large; 8 conical and closely united 

 at base to 7. Mouth cone reaching less than half way across prosternum, 

 broadly rounded at apex. 



Prothorax narrow, two-thirds as long as head and (inclusive of coxae) 



