284 Mr. R. 8. Bagnall on Thysanoptera 
narrower than the pterothorax, with no great disparity 
between the lengths of segments 7 and 8, the latter being 
the shorter. Tube approximately 0°6 the length of the head, 
sides gently narrowed to near apex and then faintly con- 
stricted. Terminal hairs weak distally, about 0°7 the length 
of the tube. Abdominal bristles light-coloured and mode- 
rately long, those on segment 9 about 0°8 the length of the 
tube. 
This species differs from D. rex in its larger size, darker 
colour, stouter head, and the absence of the outstanding 
genal spinelets other than the pair immediately behind the 
eyes. From D. stenocephalus it differs in its stouter head, 
the longer intermediate antennal joints, the shorter post- 
ocular and anteocular bristles, seemingly stouter and 
shorter genal spinelets, the more strongly incrassate fore- 
femora, ete. In D. stenocephalus there are a pair of longish 
bristles on the intermediate tibiz in the basal third, which 
are not nearly so long and prominent (about 0°5 the length) 
in this species, whilst the minor sete of the intermediate 
and hind femora and tibize are more as in D. rev than in 
D. stenocephalus. 
Loc. Seycuznttrs. Mahé: 2 ¢ from near Morne Blane, 
x.-xi. 1908. 
There is a g example from Mahé (Cascade Estate, about 
1000 feet) which is apparently referable to this species, but 
differs in many ways. The head is slightly shorter, whilst 
there is a prominent pair of genal spines below the middle ; 
and the produced part is comparatively less. The antenne 
are of a deeper yellow or light brownisk-yellow where they 
are lemon-yellow in the form just described. The pronotum 
is shorter and the postero-marginal sete are shorter, the outer 
part being of a light vellow colour, whilst the coxal spine is 
also comparatively shorter (8:10). There are only forty 
duplicated cilia in the fore-wing. I have labelled it D. 
mahensis var., provisionally. 
22. Dicatothrips hystria, sp. n. 
(Pl. VII. fig. 8.) 
? —Length 3°7-4°0 mm. 
Colour dark chestuut-brown; third antennal joint lemon- 
yellow lightly tinged with brown at apex and narrowly 
ringed with dark brown at extreme apex ; four similarly 
yellow with the distal third or more brown and the extreme 
