Labiduridae, a family of the Dermaptera. 179 
Antennae with 16 segments, dark brown ; first long and slender, 
apically clubbed ; third long and slender, cylindrical; 4th and 5th 
cylindrical, each about half as long as the 3rd, the rest gradually 
lengthening, all slender and cylindrical, the apical segments about 
as long as the third. 
Head dark brown, smooth and shining ; eyes small. 
Pronotum slightly longer than broad ; gently widened posteriorly, 
all margins straight, sides gently refiexed. 
Meso- and metanota transverse, typical : all the thora.x dull deep 
brown, with a few brown bristles ; smooth. 
Sternal plates lighter brown; prosternum almost parallel sided; 
mesosternum rounded; metasternum truncate posteriorly. 
Legs long and slender, dull brown ; tarsi very slender. 
Abdomen slender, feebly dilated beyond the middle and apically 
attenuate in both sexes, exceedingly finely punctulate; sides of 
segments 6-9 in ^ rounded and smooth. 
Last dorsal segment ^ 5 slightly narrowed apically, with a 
median sulcus, posterior margin subsinuate, with a slight convexity 
corresponding to the upper ridge of the forceps. 
In forceps with the branches ^ 5 subcontiguous at the base, tri¬ 
gonal, rapidly attenuate, feebly arcuate, more so in the ^ than in 
the $ , slender ; black, with a fulvous spot on the outer face near 
the base. 
Sandwich Islands: Kaui, Koholuamano, 4000 ft., and 
Waimea, iv/95 and vii/96 (Perkins). 
This is evidently the species quoted by Brunner (P.Z.S., 
1895, p. 892) and by Perkins (Fauna Haw., 1899, p. 4) 
as A. pacifica, Erichs., but it is not “ half the size of 
F. aiLricularia," nor do the forceps correspond to Erichson’s 
description. 
There are specimens in the British Museum, and a pair 
in my collection, the male of which is my type. 
The two sexes are very much alike; the slender body 
and limbs distinguish it, as much as the relatively long 
fourth and fifth segments of the antennae. 
According to Perkins, it is found only in the mountains 
of Kaui. 
Genus 4.— Euborellia, Burr. 
This genus was erected recently, under the name 
Borellia, by me (1909^, p. 325) for those species, formerly 
included in Anisolabis, with distinct rudimentary elytra, 
named in honour of my good friend Dr. Alfredo Borelli, of 
N 2 
