Mr. M. Burr — Notes on the Forficularia. 247 



third abdominal segments. This character is insufficient to 

 justify the separation of a genus, and accordingly Scudder 

 (Proc. Bost. Soc. N. H. xviii. p. 290, 1876) sank Brachylabis, 

 as mar iti ma is the type of Forcinella ( = Anisolabis) } from 

 which mauritanica cannot be generically separated. But 

 Scudder had not seen chilensis, Blanch., or he would have at 

 once recognized its difference from maritima, though he 

 knew and described under the genus Cylindrogaster the 

 species nigra, which is now known to be a true Brachylabis. 

 In 1883 de Bormans (Ann. Soc. ent. Belg. xxvii. p. 64) 

 separated Brachylabis, Dohrn, for chilensis, which he made 

 the type, and punctata, Dubr. Verhoeff did not know any of 

 the six described species of Brachylabis when he erected his 

 family Isolabidre for his three genera Isolabis, Ctenisolabis, 

 and Leptisolabis, all from the Ethiopian Region (SB. Ges. 

 naturf. Fr. Berlin, 1901, no. 1, p. 10) ; but three years later 

 (Arch. f. Naturg. 1904, Bd. i. p. 119) he noted the resem- 

 blance between the Isolabidse and Brachylabis, though he 

 had not seen a single specimen of the latter. He doubted 

 the inclusion of B. chilensis in the Isolabidaj, but suggested 

 that B. bifoveolata was a true Isolabid. 



A comparison of the generic characters shows that the two 

 genera are evidently allied, and a glance at the types in 

 Berlin removed all remaining doubt. 



It now became necessary to examine the different species of 

 Brachylabis to see if it were possible to reorganize the 

 system and allocate the various species to the different 

 genera. 



Fortunately I possess in my collection the following- 

 species: — chilensis, Blanch., nigra, Scudder, malgacha, Burr, 

 punctata, Dubr., from Java, as well as punctata, Bormans, 

 from Burmah, which is a distinct form. 



By using Yerhoeff's arrangement of the Isolabida?, it was 

 possible to allocate all these species to what appears to be 

 their true position ; thus the riddle of the Isolabidae, which 

 has puzzled dermapterists since 1902, is solved. 



liable of Subfamilies and Genera. 



1. Seginenturn ultirnum dorsale <5 niargine 

 postico medio exciso, utrinque lobulo 

 tviangulari instvuctum; curpus t'erecvlin- 



dricum Brachylabin^s. 



2. Mesonotum ely tris rudimentariis instruc- 

 tum 1. Verhoeffia, g. n. 



2.2. Mesonotum elytris rudimentariis nullis. 



•'!. .Mesonotum lateribus carinatis 2. Brachylabis, Dohrn 



3.3. Mesonotum lateribus integris, inter- [(= Ctenisolabis, Verb.). 

 dum tumido-elevatis. 



