190 Dr. Malcoli^Burr’s Preliminary Revision of the 
In a recent paper I revised tlie Bracliylabinae (Ann. 
Mag. N. H. (8) vol. ii, pp. 246-355, 1908), showing that 
Verhoeff’s Isolahidae coincide with the already known 
Brachylabinae. 
In that paper I sunk Ctenisolabis, VerhoefiF, in Brachy- 
lahis, Dohrn, not because I considered C. togoensis (type of 
Ctenisolabis) congeneric with B. chilensis (type of Brachy- 
labis), but because Verhoeff’s diagnosis of Ctenisolabis gives 
no character not common to Brachylabis. 
But the consideration of the eyes, suggested by the 
study of fossil forms, suggests a modification of this 
arrangement, because B. chilensis, the type of Brachylabis, 
has eyes which are large, it is true, but do not reach 
back near to the posterior margin of the head, being 
more normally situated. 
Most of other species of Brachylabinae known to me 
have lateral eyes, and this appears to be the case in Cteni¬ 
solabis togoensis, Verb., judging from a sketch of the type 
made for me by Herr Flandetsky in the Berlin Museum. 
It would accordingly appear necessary to eon^we Brachy¬ 
labis to its type, B. chilensis, and to revive Ctenisolabis 
with its type, G. togoensis, Verb., and also for some of the 
other species formerly included by me in Brachylabis, 
separating others into a new genus which stands in exactly 
the same relation to Isolabis that Ctenisolabis stands to 
Leptisolabis. 
This modification of my former views, suggested by an 
examination of further material, was first put forward in a 
recent work on the Earwigs of India, the faunistic scope of 
which, however, prevented the treatment of the whole group. 
I accordingly now offer a revised system, with sundry 
observations, upon all forms known to-day. 
TABLE OF GENEEA. 
1. Oculi parvi, anteriores. 
2. Elytra rudimentaria adsuiit . . . 1. Arlex, n. n. 
2.2. Elytra omnino desunt. 
3. Mesonotum carinatuni ... 2. Brachylabis, Dohrn. 
3.3. Mesonotum hand carinatuni. 3. Nunnisolabis, Burr. 
1.1. Oculi magni, laterales. 
2. Antennarum segraentum 3 elon- 
gatuin, duplo longius quam 
latius; 4 sat longum hand 
globulare. 
