314 
COSTA RICAN DERMAPTERA AND ORTIIOPTERA 
Pronotuin liroader than long; cephalic margin truncate; latero-cephalic 
angles narrowly rounded; lateral margins subparallel, arcuato-truncate; latero- 
caudal angles rounded obtuse; caudal margin broadly arcuate. Surface of 
disk in section gently arcuate, with an impressed median sulcus in cephalic 
half, followed at caudal two-thirds by a median circular i)it-like depression, 
l)aired circular depressions placed in middle of lateral halves of cephalic 
section of disk; niesad the disk is narrowed by extension of lateral areas, 
which widen regularly caudad to this point of greatest width, where they in- 
dividually constitute one-fifth of total i)ronotal width, then l)y a pronounced 
jiieso-laterad directed oblitpie definition, become ol)solete. Lateral areas 
V('ry ai)preciably reflexed dorsad. 
Tegmina with greatest length equal to one and one-fourth times greatest 
length of pronotum, seen from dorsum the pair slightly and regularly broaden 
caudad, except in distal fourth, where the humeral carinae are sub})arallel 
when tegmina are in normal position; sutural margins in contact for greater 
portion of their length, exposing scutellum in'oximad; distal margin truncate, 
but little oblicpie, nearly transverse; humeral keel carinate, elevated, i)ro- 
nounced, continuous; costal margin straight for proximal two-thirds, in 
distal third arcuate to keel; marginal field with width ecjual to slightly more 
than one-fourth of length of same. 
Abdomen broad, short fusiform. Disto-dorsal tergite rather small, sym- 
metrically trai)ezoidal; surface moderately depressed meso-distad. Sub- 
genital ])late very ample, scoop-shaped, its free margin broadly arcuate 
with faint median flattening. Forceps simple, tapering, tips moderately 
hooked and weakly recurved, internal margin serrulate; surfaces striatidate, 
particularly ahmg dorso-internal section. 
Limbs largely damaged or missing. Cephalic limbs short and robust. 
(General color deep bay on the dorsum of abdomen, becoming dresden 
brown to auburn on venter, tegmina, disk of pronotum and head, latter pale 
on occiput. Lateral areas of pronotum ])ale chamois. Forceps ])ale ochra- 
ceous-tawny. Remaining- limbs ochraceous-bufl. 
Length of body (exclusive of forceps) S mm.; length of irronotum, 1.35; 
greatest width of pronotum l.b; length of tegmen, l.GS; greatest width of 
tegmen, 1.09; length of forceps, 2.25. 
Id juldition to tin; type we have l^efore us an iinniature speei- 
luen of siuall size, Irearing the same data. 
METRESURA12 new genus 
h'rom Ncolobopfiora and Rhyacolahis this j>;('nus is readily 
dislinguishahU; by tlu' inlhited and divid('d o(*(‘ii)ul, (he small 
ey{‘s and llu' tc'gmina Ix'ing; without true hunu'ral krads. As 
is the (‘as(' with Neolohophora, liletrcsura also dil'h'rs fi'om //////- 
(icohihis hi tlu' broad disk and nai'rotv latc'ral s('c(ions of llu' 
t'l'om usTprjJtc and oupa /u/7, in allusion to tlic divid(‘r-liU(' 
force]).' of the male. 
