191 
Labiduridae, a family of the Dermaptera. 
3. Mesonotum liautl carinatum . 4. Isolabis, Verb. 
3.3. Mesonotum carinatum ... 5. Metisolabis, Burr. 
2.2. Antennarum segmenta brevia, 
3 baud vel vix longiori quam 
latiori, 4 globulari. 
3. Mesonotum carinatum ... 6. Gtenisolabis, Verb. 
3.3. Mesonotum baud carinatum . 7. Leptisolabis, \erh. 
SCHEME OF GENERA OF THE BRACHYLABINAE. 
A. 
Rudimentary Elytra present . . Arlex, n. n. 
B. 
No rudiments of Elytra. 
Mesonotum. 
Keeled 
Smooth 
Eyes small. 
Brachylabis 
Nannisolahis 
Eyes 
3rd and 4tb antennal 
segments long. 
Metisolabis 
Isolabis 
big. 
3rd and 4tb antennal 
segments sbort. 
Gtenisolabis 
Leptisolahis 
Genus 1.—Arlex, n. n. 
Verhoefia, Burr, 1908^, p. 248. 
This is the only member of the family showing any 
trace of rudiments of elytra. This feature is well shown 
in Borg’s figure (1904, p. 568, Taf. XXVI, fig. 2), as also 
the normal situation of the eyes. 
The genus is monotypic for Brachylahis sjostedti, Borg. 
(/. c.), from the Cameroons. 
The name Verhoeffia is praeoccupied by Broleman in 
Myriapoda in 1895, so I proposed the new name 
Arlex. 
Genus 2.—Brachylabis, Dohrn. 
Brachylahis, Dohrn (partim) (1884), p. 297. 
„ Bonn. (1883), p. 64. 
„ Burr (1908»), p. 248. 
