252 Mr. M. Burr — Notes on the Forficularia. 



gives a description, with an enquiry as to the sex. I have a 

 coloured sketch of a female by de Bornians which Bhowa 

 distinct straight keels on the mesonotum, so it must appa- 

 rently be referred to this genus. From this sketch it appears 

 that the third antennal segment is decidedly long. 

 It may be provisionally ranged in Brachylabis. 



Genus III. ISOLABIS, Verb. 

 Isolabis, Verhoeff, SB. Ges. naturf. Fr. Berlin, 1902, p. 14. 



In this genus there are no keels on the mesonotum, though 

 the sides are somewhat tumid ; it thus differs from Brachy- 

 labis. 



It differs from Leptisolabis in having the third antennal 

 segment double as long as broad. The forceps $ are remote 

 at the base. 



It contains at present a single species, I. braueri } Verb., 

 from Africa, which is only known to me from the description 

 and a sketch of the type. 



Genus IV. Leptisolabis, Verh. 



Leptisolabis, Verh. SB. Gts. naturf. Fr. Berlin, p. 12 (1902). 

 Brachylabis, Bonn, (partirn). 



This genus agrees with Isolabis in having no keels to the 

 mesonotum, but differs in having the third segment of the 

 antennas very short, only as long as broad. According to 

 Verhoeff, the two African species have the head on a slim 

 neck ; but I consider this an individual peculiarity dependent 

 on the position assumed by the organs on drying and analo- 

 gous to, and as valueless as, the crossing of the forceps at 

 the apex, which is as purely fortuitous as the position assumed 

 by the antennas or legs. The branches of the forceps are 

 near together at the base. In all known species the antennas 

 are ringed with white and the femora and tibias with yellow. 



Table of Species. 



1. Pronotum parallelum 1. philetas, Bun*. 



1.1. Pronotum postice dilatatum. 



2. Pronotum anteriori margine truncato : 



species javana 2. punctata, Dubr. 



2.2. Margo anterior pronoti in colleni brevem 

 productus : species africanae. 



3. Metanotum paullo excavatuui 3. usambarana, Verb. 



3.3. Metanotum fortiter excavatum 4. theoria, Verb. 



