MORGAN HEBARD 
321 
cf 
Length 
of 
body 
Length 
of 
pronotum 
Width 
of 
pronotum 
Length 
of 
tegmen 
Length 
of 
forcepa 
Porto Bello, Panama 
5.G 
.92 
.88 
1.84 
1.22 
Trinidad. Type of Iriniialis 
5.5 
.86 
.86 
1.9 
1.22 
9 
Porto Bello, Panama 
4.53 
.82 
.8 
1.55 
1.02 
Porto Bello, Panama 
4.35 
.82 
.8 
1.84 
1.16 
Trinidad. Type of trinitatis 
4.9 
.82 
.81 
1.7 
1.09 
The following minute species are 
extremely 
hard 
to place, 
owing to the presence of various important features which do not 
agree with those of any one of the groups of the Dermaptera. 
The structure of the head in all is as found in the Labiinae. 
The pronotum is suggestive of the Labiinae in Geracodes and 
Barygerax, of the Diplatyinae in Gerax and Eugerax. The teg- 
minal and wing development is distinctive and different in all, 
and these organs are thickly covered with short hairs, except in * 
Gerax. The abdomen in all is thickly clothed with hairs. The 
forceps are. simple, cylindrical and straight, to the incurved 
apex in the males.-* The tarsal claws, in all except Geracodes, 
are furnished with arolia, a feature not found in the Labiinae, 
but occurring in the Diplatyinae. The development of the male 
metaperameres is remarkable in Gerax; the spines, projecting 
beneath the forceps in Eugerax, unparalleled in the Dermaptera. 
The femora are unkeeled as in the Labiinae. 
These species will probably require the erection of one or more 
new subfamilies, when sufficient material has been obtained to 
examine fully the genitalia in both sexes, and the relative values 
of the most striking differences are better understood. At 
present we are inclined to place them after the Labiinae. 
The characters of greatest importance are given in the following 
key: 
A. Tarsal claws without arolia. First antennal joint over tmce as long as 
any of the distal joints. Wings extending beyond tegmina more than teg- 
minal length. (Eye much shorter than cheek. Antennae with sixteen to 
seventeen joints; first antennal joint heavy and very elongate, \\'iden€H^ pjfo.xs- 
imad; succeeding joints all short, moniliform. Pronotum not strikingly nar-- 
rower than head, lateral margins rather strongly diverging caudad, met.^Qfta' 
deplanate. Tegmen elongate, about twice as long as pronotum. Head, 
The male sex of Geracodes is unknown. 
TRANS. AM. ENT. SOC., XLIII. 
