398 Mr. R. S. Bagnall on new Thysanoptera. 



Relative lengths of antennal joints and of the areas of fore- 

 wing (which latter approximate australis more than pro- 

 jnnquus) as shown in tables under description of 0. pro- 

 pinquus. Maxillary palpi 7-jointed. 

 Setse on veins of fore-wings minute. 



Ty2:>e, Hope Department of Zoology, University Museum, 

 Oxford. 



Hah. Australia, Healesville, Victoria ; 3 ? s from flowers 

 of KrytJircea australis, December 1913 {A, E. Shaw and 

 R. Kelly). 



Family Thripidae. 

 Pseudoihrips achcetus, sp. n. 



? . — Length 1*1 to 1-2 mm. 



Chestnut-brown ; fore-legs yellow, femora tinged with 

 grey-brown and tibiae lightly with grey; intermediate and 

 hind legs brown shaded with grey, tibiai yellowish distally ; 

 all tarsi yellowish. Antennae with joint 1 light grey-brown, 

 2 concolorous with head, 3 yellowish-brown, 4-5 yellowish- 

 brown to grey-brown and 6 to 8 grey-brown to brown. 

 Fore-wing yellowish-brown, a shade lighter at base. 



Head transverse, about 0*6 as long as broad ; eyes large, 

 not bulging, somewhat coarsely facetted, pilose ; ocelli 

 large ; no post-ocular or interocellar bristles. Antennse 

 longer and more slender than in parvus, Bagn,, about 2*3 

 times the length of the head ; relative lengths of joints 

 approximately as follows: — 7 : 12 : 17 (including stem) : 

 15 : 13 : 17^ : 3 : 4. 



Prothorax scarcely longer than the head, and about 0'6 as 

 long as broad ; hind margin with a series of moderately 

 stout set^, but no prominent bristles at hind angles. Wings 

 pointed at apex ; both veins of fore-wing regularly set with 

 setee. 



Setai at apex of abdomen stouter than in P. parvus, a pair 

 of short curved dorsal setas on 9, and posterior margin of 

 tergite 8 not fringed. 



^ . — Smaller, lighter, all legs yellowish marked with 

 brown; sternites apparently without transparent areas. 



Easily separated from P. parvus, Bagn., by the dark colour 

 of body, the comparatively shorter head, longer and more 

 slender antennse, and the absence of prothoracic bristles. 



Type. Hope Department of Zoology, University Museum, 

 Oxford. 



