276 Mr. R. 8. Bagnall on Thysanoptera 
of 4 to 9 is distinctly spine-like, and there are two long, 
stout, dark postero-marginal bristles on segments 4 to 6 at 
least, and 1] on 8. 
Loc. Srycne.tites. Mahé: Cascade Estate, about 1000 feet, 
iil, 1909,3 9,1 6. 
13. Cryptothrips difficilis, sp. n. 
(Pl. VII. figs. 2, 4.) 
9-.—Length 3°2 mm. 
This species comes very near to C. seychellensis. There 
is unfortunately only one specimen, but, apart from its larger 
size, a number of small differences may be observed. The 
head is comparatively longer (63 : 40 compared to 57 : 40), 
and the cheeks practically subparallel. The postocular 
bristles are much longer and more slender, being 1:7 times 
the length of the eye, whilst the interocellar pair are 
placed nearer together. The antennal segments 3 and 4 are 
of a uniform deep yellow (or light brownish-yellow), the 
fourth not shaded with brown at apex as in seychellensis. 
The pronotum is not so strongly transverse, and the width 
across fore-coxe is less compared to the breadth of the 
pterothorax. 
Loc. Strycuetites, Silhouette: near Mont Pot-a-eau, 
about 1500 feet, August 1908, 1 ?. 
Genus ApiaPHoroTuRirs, Bagnall. 
14. Adiaphorothrips brevis, sp. n. 
(PI. IV. fig. 6.) 
¢ .—Length 2°4 mm. 
Dark black-brown to black, shining ; fore-tibie dark 
yellowish-brown ; antenne black, second antennal joint 
distally and third wholly lght yellowish-brown, fourth 
chestuut-brown. 
Head very slightly longer than broad ; cheeks parallel, 
spinose. Eyes finely facetted, postocular bristles long ; 
ocelli red, posterior pair touching inner margin of eyes and 
on about a line drawn through their centre ; anterior ocellus 
forwardly directed with two minute but stout spinelets on 
each side. Antennz about twice the length of the head, 
stout ; joints 3 to 5 claviform ; 4 only slightly shorter 
than 3; 7 and 8 closely united. Sense-cones moderately 
longer, slender. 
Prothorax massive, broadly united to the pterothorax, 
a Bl a 
