from the Seychelles Islands and Rodrigues. 259 
Dinurothrips rutherfordi, Bagu. (a previously known species), 
as the type of the genus. 
Of the two known species from Mahé, Limothrips cerealium, 
Hal., is a cosmopolitan form which usually affects cereals, 
and is known throughout the Temperate regions, and of 
which I have records from North Africa, Australia, and 
South America; and KEurynothrips denticollis, Bagn., was 
originally described from Queensland, and until now not 
found elsewhere. 
It is evident that the smaller species comprising the 
Terebrantia have not been specially collected. They are for 
the most part to be found in flowers and affecting grasses, 
the leaves of trees, etc., and it is probably in this particular 
section of the order that many peculiar forms will be found 
affecting the large proportion of plants not found outside 
the islands. 
Geographical Affinities. 
As the study is a young one and our knowledge of the 
African and Indo-Malayan species as yet very imperfect, it 
is difficult to generalize. It may be said, however, that, as 
in so many other groups, a large proportion of the fauna is 
peculiar, and that, especially in regard to new or little-known 
genera, the affinities seem to be overwhelmingly Oriental or 
Indo-Malayan. 
Three species of Tryphactothrips are now known—ruther- 
fordi (Bagn.), from Ceylon, roboris, Bagn., from West Africa, 
and brevisetis, described herein; the genus comes nearest 
to Dinurothrips, wherein we know three species from 
Australia, West Indies, and South America respectively. 
They are of ‘* Heliothripid ”’ affinities, a group wherein a large 
proportion of species affect crops such as cacao, indigo, or 
plants grown for ornamental purposes. 
If Brachyurothrips has relationship with any described 
form, it is with the peculiar Indian genus Panchetothrips, 
Bagn. 
Two species of Adiaphorothrips are now known from 
Borneo, whilst Gynaikothrips is very strongly represented in 
the Malay Archipelago. 
Acallurothrips and Cenurothrips are allied genera, and I 
have in my possession another species of Cenurothrips from 
Ceylon, which I am describing elsewhere. 
As to the other species, it is difficult to draw conclusions. 
Dicaiothrips is a genus of wide distribution, but chiefly 
outside the temperate regions, aud more strongly represented 
18* 
