196 Br. Malcolm r)urr’s Preliminary Revision of the 
Genus 4.—IsoLABis, Verhoeff. 
Isolahis, Verb., oj). cit., p. 14. 
Jsolabis, Burr (op. cit.). 
This genus is monotypic for J. hraneri, Verb., from 
Africa. It is somewhat larger than its allies. 
Genus .5. — Metisolabls, Bun-. 
Metisolabis, Burr, 1910^, p. 108. 
Antennae segmentis longis, omnibus longioribus quain latioribns ; 
mesonotum lateribus carina, interdam obtusa, instructum ; ceteris 
cum Ctenisolabide congruet. 
I formed this genus for those species whicli liave the 
antennal segments elongate, cylindrical, always longer than 
broad, even the fourth. Thus it approaches Isolabis, 
V'^erli., to which it stands in the same relation as Ctenisola- 
bis to Lcptisolabis^ 
The type of the genus is Prrachylabis voeJtzhoun, Burr, 
from Nossi-be, though that species has the keels of the 
mesonotum decidedly blunt and rounded, thus approaching 
holabis. 
I place Br. hifoveolcUa here because Bolivar figures it 
witli clearly elongate antennal segments and well-marked 
keels. 
TABLE OF SPECIES. 
1. Pronotum longius quam latius; 
species madecassae. 
2. Mesonotum carinis obtusis, usque 
ad marginem posticum productis 1. •mabjacha, Burr. 
2.2. Mesonotum carinis acutis, ante 
marginem posticum evanescen- 
tibus.2. voeltzkoivi, Burr. 
1. Pronotum vix longius quam latius y 
species orientales. 
2. Pedes unicolores; abdomen seg- 
mento 4 plicifero..3. bifoveolata, Bob 
2.2. Pedes fulvo-annulati ; abtlomen 
segmentis 3 et 4 plicit'eris . . 4. caudelli, Burr. 
