Mr. R. S. Bagnall on new Thysanoptera. 215 



explaiiate lateral margins of tlie protliorax, in the simple 

 iinteiiiial style aud the structure ot" tbre-wiiigH, which are 

 without seta9 aud cilia on the costa. 



Australothrips bicolor, sp. n. 



? . — Length about 1*1 mm. 



Orange-yellow ; head, protliorax, mesothorax, scutular 

 area, and sides of metathorax dark chestnut-brown ; tore and 

 intermediate femora dark brown ; hind-femora and fore and 

 intermediate tibia3 lightly tinged with brown. Antennce with 

 joint G apically and style brown; first joint lightly tinged 

 with brown. Scale ot" tore-wing, small patch ailjoining, and 

 mid- vein and cilia of hind-wing brown. 



Head about 1"8 times as broad as long, cheeks slightly 

 converging, and hind angles prominent ; network reticulation 

 of surface strong, especially below an arcuate raised line 

 behind eyes. Eyes prominent, space between them about 

 twice the width of an eye. Vertex sinuate on each side of 

 raised part, having the antennto, which are twice as long as 

 the head, seated in the sinuations. First aiitennal joint 

 short; second quadrate, with distal cup-shaped hollow for 

 reception of 3 ; 3 long, claviform, constricted at apex ; 4 and 

 5 cylindrical, with minute stem, and 4 also narrowly con- 

 stricted at apex ; 6 broadest basally ; 7 and 8 together styli- 

 lorm, aud the relative lengths and breadths as follows : — 



16 •■ 34 : 48 : 28 : 24 : 22 : 8 : 13 



20 : 30 : 16 : 17 : 17 : 14 : 7 : 5 ' 



Prothorax as long as or only slightly longer than the head, 

 and (excluding the lateral explanate margins) as broad as 

 the head. Legs comparatively short and stout. 



Posterior margins of abdominal tergites with more or less 

 regularly placed, minute, blunt projections ; setae on segment U 

 short and those on 10 very short, colourless. 



(^ . — Smaller, more slender. Lemon-yellow where orange- 

 yellow in ? . Tergite 8 set with four long and rather stout 

 spines set on an arcuate series of tubercles. 



Ti/pe. Hope Department of Zoology, University Museum, 

 Oxford. 



Hub. Australia, Healesville, Victoria; on Eucalijplas 

 vuninulis (U. Kelly). 



lo* 



