256 Mt. K. S. Bagnall on new Thysanoptera. 



should be placed near Heliothrips, and not with Panchceto- 

 tfirips, Bagn. The explanate lateral margins of the prothorax 

 are narrow and take up the whole of the length. The terminal 

 abdominal setaa are probably broken off. The reticulation of 

 the pronotum is of a different nature to that described in 

 Heliothrips and the other species of this genus; it takes the 

 form of sunken, roundish, or elliptical areas more or less 

 distant from each other. 



Dinurothrips vezenyii, sp. n. 



$ . — Length c. 1*5 mm. 



Brachypterous ; wings reduced to a pointed pad with 

 wing-scale intact, about four times as long as broad, yellow- 

 brown, with light patch near middle and marked dark grey- 

 brown distally ; one long seta at apex of scale. 



Colour reddish-brown, deeply shaded with dark grey- 

 brown, especially in the abdomen (where dark median and 

 lateral patches in segments 2 to 6 are noticeable) and across 

 the pronotum ; fore-part of head and the pronotum anteriorly 

 and posteriorly more or less yellow. Antennae broken in the 

 unique specimen, joint 1 yellow, 2 dark grey-brown. Tarsi 

 and tibia? distally more or less yellowish. 



Head much as in D. hookeri, but with the constriction 

 behind eyes less marked and the cheeks less swollen ; the 

 deep channel separating the raised vertex and the eyes more 

 evenly reticulated than in hookeri. 



Pronotum much as in D. hookeri, the disc (excluding 

 lateral explanation) widest at middle; the explanate lateral 

 margins occupying the length of the pronotum, but chiefly 

 noticeable in the distal half. Dorsal reticulation of abdomen 

 evidently stronger than in hookeri, evanescent median poste- 

 liorly. Last abdominal segment stouter and less produced 

 than in hookeri, less than the length of the head; bristles 

 strong and moderately long, much as in hookeri. 



Hab. South America, Tucuman (Argentine), November 

 1905 ; 1 ? (Vezenyi). 



Genus Tryphactothrips, Bagn.* 



TabU of Species. 



1. Head and prothorax strongly transverse, 

 spines of the fore-wing longer than the 



* This genus is erected for Dinurothrips rutherfordi, Bagn., in a 

 memoir on the Thysanoptera of the Seychelles now in press, wherein 

 D. brevisetis is described and 1). rutherfordi figured. 



