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THE ANNALS 
MAGAZINE OF NATURAL HISTORY, 
[NINTH SERLES. ] 
No. 40. APRIL 1921. 
XXXIV.—On Thysanoptera from the Seychelles Islands and 
Rodrigues. By Ricuarp S. Baenatt, F.R.S.E., F.L.S. 
[Plates 1V.—VII. } 
Ture Thysanopterous fauna of Madagascar, the Mascarene 
and the Seychelles Islands is virtually a new field of enquiry. 
In 1910 Trybom described Liothrips tarsidens, Liothrips sp., 
and Megalothrips macropteryx from Madagascar, and three 
years later the present writer diagnosed Physothrips varia- 
bilis from the Comoro Islands. 
This memoir is based chiefly upon the collections made 
by the Percy Sladen Trust Expedition to the Indian Ocean 
under Professor Stanley Gardiner, F.R.S., in 1908-9, many 
results of which have been published in a series of special 
volumes (Trans. Linn. Soc. Lond. ser. 2, Zool. vols. xii.- 
xvii.). The Thysanoptera were collected by Dr. Hugh Scott 
in the mountainous granitic islands of Mahé and Silhouette 
in the Seychelles group. Almost all the species were 
obtamed at considerable elevations in the highly peculiar 
endemic forests. The only exceptions appear to be Haplo- 
thrips mahensis (all the examples of which were taken among 
imported vegetation at coast-level) aud Gynaikothrips scotti, 
specimens of which were found not only at high elevations in 
the native forest, but also on Long Island, a coconut-planted 
Ann. & Mag. N. Hist. Ser. 9. Vol. vii. 18 
