436 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
at apex, outer margin arcuate, inner margin correspondingly concave, 
basal angles obtuse, not prominent. 
Described from a single macropterous male taken by the writer on 
Azxonopus compressus at St. Augustine, Trinidad, B. W. I. (May 15, 
1942.). Type, U.S.N.M. No. 56685. 
Family DERBIDAE 
Tegmina relatively large, wings usually not less than half as long 
as tegmina, venation not greatly reduced. 
Subfamily DERBINAE 
6a. Clavus closed, sometimes narrowly open; common stalk of united claval veins 
not extending beyond apex of clavus; anterior sector of Cus with not less 
than three veins. 
Tribe DERBINI 
Genus DERBE Fabricius 
Derbe Fasricius, Systema rhyngotorum, p. 80, 1803. (Genotype, D. haemorr- 
hoidalis Fabricius, designated by Westwood, Proc. Linn. Soe. London, 1840, 
vol. 1, p. 83.) 
Head narrow; antennae with first segment short, second segment 
large, subcylindrical, truncate at apex, densely studded with sensorial 
pits; tegmina large, veins prominent, media with anterior sector with 
five apical branches, posterior sector with six to eight apical branches; 
a short row of wax-bearing prominences developed on Sc and R, M, 
and Cu, basad of apex of clavus. 
DERBE ULIGINOSA, new species 
PLATE 9, FicurRES 118-123 
Female: Length, 6.8 mm.; tegmen, 14.5 mm. 
Tegmen with posterior sector of M with eight branches reaching 
margin, the cells posterior to the fourth to eighth of these branches 
each nine times as long as wide. 
Fuscous, clypeus darker; posterior half of pronotum pallid, mesono- 
tum with a large piceous spot on each side basally, legs testaceous, 
abdomen dorsally fuscous with a row of testaceous spots on each side of 
middle line, ventrally testaceous, genitalia fuscous; tegmina hyaline, 
ivory yellow, veins dark fuscous, a fuscous stripe along middle of cells 
basad of apex of clavus or anterior to posterior sector of media, a 
fuscous patch at commissural margin at end of oblique line of trans- 
verse veins; wings hyaline, a narrow fuscous stripe along middle of 
basal cells of R and M, apical margin clouded fuscous anteriorly, veins 
fuscous. 
