136 N. C. AGR. EXP. STA. BUL. 239 
wing which appears interrupted by the black jugal lobe of the hindwing be- 
neath when the wings are at rest, apical cells hyaline. Face yellow with a 
broad median black stripe extending over clypeus and clypellus and in- 
cluding the lora. 
Holotype male, Archibald Estate, Roxborough, Tobago, November 6, 1918 
(Harold Morrison) in USNM. 
D. lobatus, n. sp., differs from all other species in the genus in the very long 
lobe of the aedeagus which is separate from the shaft almost throughout its 
length and in the elongate slender form of the shaft. 
Dilobopterus costalimai, NEW SPECIES 
FicurE 80, PAGE 122 
Length of male 8.8 mm, of female 8.8-9.1 mm. Head with median length of 
crown varying from slightly less than four-tenths to almost six-tenths inter- 
ocular width and from slightly less than one-third to almost four-tenths trans- 
ocular width, anterior margin much more produced than in D. axillaris, n. sp., 
and with anterior margin rounded in dorsal aspect; antennal ledges with an- 
terior margins obliquely convex in lateral view, without a dorsal carina. Fore- 
wing with a large discal membranous area, claval veins indistinct; hindwing 
with jugal lobe greatly enlarged and extending posteriorly beyond claval apex 
of forewing with wings in rest position. Other external structural characters as 
in axtllarts. 
Pygofer moderately produced, somewhat abruptly rounded at apex, macro- 
setae numerous and irregularly dispersed on disk, with a short weak apical 
process in dorsal aspect; plates not extending as far posteriorly as pygofer 
apex, each short, triangular, gradually narrowed throughout length, with apex 
rounded, with multiseriate macrosetae almost throughout length; style ex- 
tending posteriorly considerably beyond apex of connective, with a distinct 
preapical lobe; connective short, Y-shaped, with arms widely divergent, 
strongly keeled; aedeagus symmetrical, with short blunt lobe extending pos- 
terodorsally, rounded apically, scarcely separated from shaft; paraphyses 
asymmetrical, consisting of a slender weak ramus arising near base of a larger 
somewhat chelate ramus which may be toothed (type). 
Female abdominal sternum VII with posterior margin slightly convex on 
each side of a very shallow median concavity. 
Crown, pronotum and scutellum yellow to orange, crown with arcuate mar- 
gins of muscle impressions broadly black, median line in its basal two-thirds, 
expanded apically to connect on each side with arcuate margins, and with a 
short slightly curved marking extending posteriorly from each ocellus to — 
posterior margin of crown, black; anterior pronotal margin narrowly and 
markings completely surrounding an orange to yellow somewhat W-shaped 
discal pronotal marking, black; a broad median Y-shaped marking on 
scutellum and a short, narrow marking on each side from arm of “‘Y”’ to ad- 
jacent lateral scutellar margin, black. Forewing with costal margin broadly, 
humeral and commissural margins, claval suture and corial longitudinal veins 
