NEW GENERA AND SPECIES OE AlSTHAi^IAN THYSANOPTERA—EOOD. 13!> 



Measurements of holotype : — Length 1-44 mm. ; head, leiigtli 0-187 mm., width 

 0-180 mm. ; prothorax, length 0-180 mm., width (inckisive of coxte) 0-378 mm. ; 

 pterothorax, width 0-39t> mm. ; abdomen, width 0-414 mm. ; tube, length 0-150 mm., 

 width at base 0-081 mm., at apex 0-036 mm. 



Antennal segments : 1234 5 678 



Length (/x) 45 57 59 63 57 56 50 34 



Width (^) 34 34 30 33 30 30 24 15 

 Total length of antenna, 0-421 mm. 



Described from one female taken by sweeiiing in forest and jungle at Nelson, 

 N.Q., April 27. 1913, l)y Mr. A. A. Girault^ 



MESOTHRIPS AUSTRALI.a: sp. nov. 

 Fernnh {macro pterous). — Length about 2-9 mm. Colour dark blackish brown, 

 with fore tibia, all tarsi, and basal portions of antennal segments 3-7, yellow ; wings 

 pale fuliginous, with dark median streak extending to middle of fore wings and to 

 near apex of hind wings. 



Head 1-68 times as long as wide, broadest across eyes, cheeks nearly straight, 

 shghtly converging posteriorly and strongly constricted at base, which is 0-69 of the 

 width across eyes ; dorsal and lateral surfaces nearly smooth, the transverse anasto- 

 mosing lines faint, with a few rather strong bristles ; vertex conically produced ; 

 postocular bristles slender, pointed, nearly as long as eyes. Eyes lai-ge and prominent, 

 one-third as long as head and decidedly narrower than their interval. Ocelli equi- 

 distant, the anterior ocellus overhanging and on a line with the base of the first antennal 

 segment. Antenna of normal structure, about 1-5 times as long as head, formed 

 almo.st exactly as in M. jordani ; sense-cone formula: 3, 1-2: 4, 2-2; 5, 1-1 +i; 

 6, 1-1 +1 ; 7 with one on dorsum near apex ; segments 1 and 2 concolourous with head, 

 2 slightly paler at apex ; 3 lemon j^ellow, with a small, inf uscate area near apex ; 

 4-6 lemon yellow, darkly infuscate in distal half ; 7 and 8 brown, the former yellow 

 in basal two-fifths. Mouth-cone short and broadly romided. 



Prothorax large, heavy, and three-fourths as long as head, the breadth across 

 coxEe 1-66 times the length and 2-6 times the apical breadth ; pronotum smooth, with 

 short, median thickening ; all usual bristles present, pointed ; the two anterior pairs 

 short, others about as long as postoculars. Fore legs greatly enlarged, the fore femora 

 longer than and nearly as broad as head, the fore tibiae about as stout as the middle 

 femora, the fore tarsi with a very large hooked tooth. Fore wings slightly narrowed 

 at middle, with about sixteen accessory hairs on posterior margin, and with the 

 three subbasal bristles very long and pointed ; wings of both pairs pale fuliginous, 

 with dark median streak extending to middle of fore wings and to near apex of 

 hind wings. 



Abdomen slender, much narrower than pterothorax,' broadest across segment 

 2. Tube about 0-8 as long as head. All bri.stles long, pointed, yellow, those at apex 

 of segment 9 fully as long as tube ; terminal bristles brown, about equal in length 

 to tube. 



