Forficulide and Chelisochidx, families of Dermatoptera. 93 
and all the Ancistrogastriny, sensu stricto, occur only in 
tropical America. 
But it takes more than a few years to mature an 
attempt at originality, and doubtless in the course of time, 
as our knowledge progresses, this proposed arrangement 
will be profoundly modified. Still, I do think it is worth 
while offering this system, as an improvement upon the 
old arrangement, when all kinds of earwigs from various 
regions were thrown together in a heterogeneous mass 
under the hitherto very elastic names of Opisthocosmia and 
Apterygida. De Bormans included no less than twenty- 
seven species in the latter genus, and various recently 
described forms have been included since. I now confine 
it to the single typical A. media. The other names in- 
cluded by de Bormans under the heading Apterygida, will 
be found scattered in numerous other genera, sub-families, 
and even families. Some will be found eventually placed 
near Labidura, others near Labia; others again near 
Spongiphora, and for others entirely new genera and 
sub-families must be formed. 
I hope that this attempt at revision approaches more 
nearly to the natural classification; it claims at least the 
merit of originality. 
I. FORFICULID. 
TABLE OF THE SUB-FAMILIES OF THE FORFICULID. 
Corpus apleruMls. ah eh iy st). sie) 1, CHELIDURINA, 
1.1. Elytra libera, perfecte explicata, vel 
rudimentaria; ale perfecte expli- 
cate vel abortive. 
2. Antenne segmentis 4 et 5 subconicis 2, ANECHURINA, 
2.2. Antenne segmentis 4 et 5 cylin- 
dricis. 
3. Antenne segmentis gradatim elon- 
gatis, 4 quam 3 longius, 5 quam 4 
etc. 
4, Antenne segmento primo valido, 
tricarinato . ... . . « 3% EUDOHRNIINA. 
4.4, Antenne segmento primo cylin- 
drico. 
5. Pedes breves; pygidium breve, 
latum, transversum. . . . 4. DIAPERASTICINA. 
