VIL 
ANNALES MUSEI NATIONALIS HUNG ARICI. 
1909. 
ON UROTHRIPS PARADOXUS, 
A NEW TYPE OF THYSAN OPTER OU S INSECTS. 
By Richard Siddoway Bagnall. 
(Plate III.) 
Dr. G. Horváth has kindly submitted to me a valuab lecollection 
of Thysanoptera from the Hungarian National Museum, Budapest, which 
contains many new and minute forms collected in North and Central 
Africa. One of the species, which I here describe, is of more than usual 
interest, being the type of a new family, and departing from all the 
known species of Thysanoptera in so many important features, as to 
necessitate an ultimate re-writing of the Ordinal characters. 
There are only two specimens both of which I have mounted in 
Xylol Balsam, after clearing in Xylol. Unfortunately certain important 
parts, such as the mouth-organs, the sexual characters, and the legs 
(which are tucked up under the body) are indistinct, but as the speci¬ 
mens appear to be examples of each sex, I have not made a suggested 
attempt to remount one of them after masceration in Caustic Potash. 
The species is Tubuliferous. One specimen has the abdomen more 
slender, and the long terminal hairs of the tube simple, whilst the 
other has the abdomen stouter and more sharply narrowed to the 
tube, and the terminal hairs whip-like in structure. In the first-named 
specimen the chitinized rod of the ninth abdominal segment, which 
characterizes the female Tubuliferon, appears to be present though very 
small and indistinct, and I have, therefore, throughout this paper regarded 
that specimen to be the female, and the example with the whip-like 
terminal hairs to be the male. 
As the base of tube, or tenth abdominal segment, is entire, or 
seemingly so, in both specimens, this determination of the sexes is 
quite possibly erroneous, though the specimens are undoubtedly the 
sexes of one species. 
Although the short diagnosis of the genus at once characterizes 
both the family and species, I have followed this short description by 
a long and detailed description of the species, and at the end have 
enlarged upon the most important features, such as the antennæ* 
