184 NEW GENERA -AND SPECIES OF THYSANOPTERA 



group of insects, and secondly to secure a certain priority. 

 Where possible I have made rough tables of the genera and 

 species, and also drawings of the more important forms. 



Ten new genera and eighteen new species are here 

 described, but this is only a small portion of the material 

 which has been so kindly and unreservedly placed in my 

 hands by the gentlemen above-named, as well as by Dr. G. 

 Horviith, National Hungarian Museum, Buda Pesth; Dr. F. 

 Meinert, Copenhagen Museum, and Dr. D. Sharp, F.R.S. of 

 Cambridge University. These latter three collections are of 

 especial value and interest, and with the exception of the 

 Hawaiian or last-named collection, the specimens are all 

 preserved in alcohol. Each collection will form the subject of 

 a separate memoir. 



Although the known Thysanoptera do not yet number 

 more than two hundred species, or thereabouts, it is very 

 evident that the Order is in reality a large one, numbering 

 probably well over a thousand species ; it is also a group of 

 wide distribution. Thrips (the name by which these insects 

 are commonly known) should be searched for in the flowers, 

 on the leaves and at the roots of various plants : on the leaves 

 and in the flowers of trees; in galls; in turf; under bark of 

 trees, etc.; and should always be collected into phials of 70 

 per cent, alcohol, the name of plant, habitat, etc., being noted. 

 Special attention should be given to the collection of minute 

 species, some of which measure only one-half a millimetre in 

 length. 



I would take this opportunity of expressing my gratitude 

 to all those naturalists I have herein mentioned for the kindly 

 help and encouragement they have given me. 



