248 THE ENTOMOLOGIST. 
each side of the eighth segment (fig. 1, a). I find that there are 
also distinct vestiges of these processes present in the female 
(fig. 1, b). They are, in both sexes, immediately in front of the 
spiracle of the eighth segment. No such organs occur, so far as 
I know, in any other species of the suborder Terebrantia, but 
something similar is found in some genera of the Tubulifera. 
Thus in Megathrips nobilis (Bagnall, Ent. Mon. Mag. xx. 1909, 
p- 131) there are lateral processes on the sixth and eighth 
abdominal segments. This feature would alone almost justify 
the separation of robusta from the genus, but I find further that 
in this species the two long ocellar spines are between the two 
posterior ocelli (fig. 1, c), whereas in all the other species of 
Frankliniella which I have been able to see, or in the descrip- 
tions of which these spines are mentioned or figured, they are 
between the posterior and anterior ocelli (fig. 1, d).* 
Further, the larva of robusta has the last two abdominal 
segments dark-coloured, a:feature more characteristic of the 
larve of the Tubulifera, and which does not occur in the larve 
of any of the species of Frankliniella that I have observed. 
On the above grounds I am removing robusta from the genus 
Frankliniella, and propose the name Kakothrips for a new genus 
to contain it, characterised as follows :— 
KAKOTHRIPS, new genus. 
= Physopus, Uzel (l.¢.), in part. 
= Frankliniella, Karny (Mitt. Nat. Ver. Univ. Wien, viii. 
1910, p. 45), in part. 
Antenne eight segmented. One long spine at each front angle, 
and two at each hind angle of the prothorax. Ocellar spines between 
the two posterior ocelli. Maxillary palps three jointed, labial palps 
two jointed. Fore vein of the upper wing set regularly throughout 
its whole length with short spines. Lateral processes on each side of 
the eighth abdominal segment in the male curving backwards and 
upwards, in the female rudimentary but distinguishable. Larva with 
ninth and tenth abdominal segments dark. 
Type (and at present only species), K. robustus. 
The characters in italics distinguish it from Frankliniella. 
Fuller particulars of the species itself will be given as 
mentioned above. 
* They are certainly in this position in the following species :—intonsa 
(Trybom) (=vulgatissimus, Uzel); tenwicornis (Uzel); melanommata, 
Williams; fusca (Hinds); stylosa (Hood); tritici (Pergande) ; imsularis 
(Franklin); helianthi (Moulton); occidentalis (Pergande, teste Hinds) ; 
cephalica (Crawford); nervosus (Uzel, teste Hinds) ; floridensis (Morgan) ; 
runnert (Morgan); gossypit (Morgan). But sulphwrea, Schmutz, would 
appear from the description to be possibly like robwsta, and in minuta 
(Moulton) they are small or absent. 
The John Innes Horticultural Institution, 
Merton, Surrey: July, 1914. 
