324 
PANAMA DERMAPTERA 
imal width; straight to the moderately incurved, chitinous, sharp apex; ventro- 
internal margin feel)ly lamellate to apex and very minutely and microscopic- 
ally serrulate. Penultimate ventral abdominal segment with distal margin 
feebly convex. 
Length of body, 4.5; of pronotum, .65; of tegmen, 1.29; of exposed portion of 
wing, 1.43; of forceps, .75: width of pronotum, cephalic, .5; of pronotum, caudal, 
.74; of tegmen, .61; of abdomen, 1.02 mm. 
Head, and dorsal surface of abdomen, mesad, warm sepia. Antennae, pro- 
notum, tegmina and wings bister, darkest on distal portion of wings. Forceps 
cinnamon brown. Femora clay color; underparts, tarsi and tibiae cinnamon- 
buff. 
The type is unique. 
BARYGERAX33 new genus 
This genus agrees with Labia and Geracodes in the head and 
pronotal contour. The presence of arolia, however, and simple 
male forceps, indicate much closer afhnity to Gerax and Eugerax; 
though, in the present genus, the male has the metaperameres 
neither armed as in Gerax, or remarkaVtle projecting, disto- 
ventral, lateral spines as in Eugerax. 
The genus is monotypic. Genotype. — Barygerax esau new 
species. 
Generic characters are given to the key. These are: the ocular 
and antennal characters, the general pronotal structure, the 
elongate tegmina and simple male forceps and metaperameres. 
In addition, we would note that the caudal metatarsus, though 
armed as in Geracodes litus, is considerably longer than the com- 
bined length of the second and third tarsal joints. The limbs 
are shorter and stouter than in the other species here considered. 
This genus is anomalous; the head and pronotum indicating 
strong Labiine affinity, the forceps and arolia Diplat 3 dne rela- 
tionship. 
Barygerax esau new species (Plate XXVI, figs. 8 and 9.) 
This is a strikingly beautiful insect under the microscope, the 
contrasts of coloration being remarkable. 
Type. — cf ; Paraiso, Canal Zone, Panama. May 10, 1911. 
(E. A. Schwarz.) [U. S. National Museum.] 
The features of major importance are discussed in the key and generic dis- 
cussion. In addition, the following are noted. Form moderately robust. 
Head with margins of cheeks converging moderately strongly to the moderately 
33 From /Sapiis = heavy, and Gerax. 
