262 Mr. R. 8. Bagnall on Thysanoptera 
suggestion of my friend Prof. J. H. Ashworth, F.R.S., I 
sent the preparation to Mr. W. B. Brierly, M.Sc., of the 
Rothamstead Experimental Station, Harpenden, who kindly 
reported as follows :— 
“The fungus spores on the Dicaiothrips belong to the 
genus Fusarium, which contains many common saprophytes 
of decaying organic matter. Owing to the absence of 
mycelium, characteristic growth, etc., it is impossible to 
identify it specifically with any degree of certainty, but it is 
not improbably Fusarium speiseri, Lindan, a species which 
Hiedick has recorded on dead Cicadas from Western 
Prussia.” 
Tn conclusion, I would express my warm appreciation of 
the help and consideration accorded me by my friend 
Dr. H. Scott, and I only regret that the demands of a very 
busy life have made it impossible for me to give his collec- 
tions the close and sustained study that they justify. 
Classification of the Order Thysanoptera. 
It is only in recent years that the Thysanoptera have 
received any serious attention, and, though satisfactory 
strides have been made in the past decade, we can as yet 
consider that we are only on the fringe of the subject. As 
further advances are made and new factors met with, old 
material requires constant re-examination in the light of 
such new knowledge. The most complete outline of the 
classification is that published by Hcod (Proc. Biol. Soc. 
Washington, 1915, xxviii. pp. 53-60), in which previous 
groups are tentatively accepted, but new names proposed 
according to modern usages, the main divisions designated 
as superfamilies in place of the previously named tribes. 
It will be seen that.the original main groups of Haliday (the 
AKolothripoidea, Thripoidea, and Phlceothripoidea of this 
paper) remain true to this day, and are only extended by the 
discovery of the Urothripoidea. 
The known Thysanoptera are divided into two suborders, 
each embracing two main groups or superfamilies, which 
may be set out in tabular form as follows :— 
1. Female with saw-like ovipositor formed 
of two pairs of gonapophyses arising 
from abdominal segments 8 and 9; ; 
