188 Dr. Malcolm Burr’s Prcliminfir]i Bevidon of the 
Sub-family ^.—PABISOLABINAE. 
This group was formed by Verhoeff for a district New 
Zealand species which he described under the name Pari- 
solahis novae zee-landiae (1904, p. 120). I have recently 
added the genus Pseudisolahis (1908^, p. 254) for P. 
walkeri, also from New Zealand. Later still, I have 
raised the groiip to the rank of sub-family (1910\ p. 102). 
Tlte genus Pseudisolahis now contains also/*, hurr\ Borelli, 
and P. tenera., Burr, both Indian species. 
Sub-family 9. —BRACHYLABINAE. 
This interesting group was separated by de Bormans 
from Anisolabis, with which it had been unnaturally 
arranged previously, but it has been little known until 
recently. 
The group is interesting on account of several appar¬ 
ently primitive features. In a number of genera we find 
that the eyes are not spherical, as in most earwigs, but 
ovate or elliptical, and very large, extending from the 
insertion of the antennae backwards almost to the hinder 
margin of the head ; at the same time, the head itself is 
not pentagonal, but almost triangular, so that in these 
particular genera the eyes may be said to be truly 
lateral. 
That this large size and lateral position of the eyes is 
a primitive feature is indicated by the discovery of a 
number of fossil earwigs in the famous Tertiary Lake 
Basin of Florissant, in Colorado, from which IScudder 
described and figured no less than eleven species. 
These all show an approach to a primitive type in the 
uniformity of character, simplicity of structure, and general 
similarity, but the most remarkable feature is the great 
size and lateral position of the eyes. This is best seen in 
his figs. 2 and 3 (Z. avia), fig. 12 (Z. cxsulatum). (Scudder 
1890, Tert. Ins., PI. XVI.) 
So much was Scudder impressed by this feature that he 
erected a species genus, Lahiduromma, for their reception. 
There are other features, too, in the Brachylahinae that 
appear to be primitive ; for instance, the forceps are in¬ 
variably simple ; they are, in fact, the simplest imaginable 
type of forceps, the branches being cylindrical, that is 
circular in cross section, absolutely unarmed, tapering and 
