144 N. C. AGR. EXP. STA. BUL. 239 
Holotype male, ‘“‘Karlingdale’’, Porto Velho, Mato Grosso, Brazil, Septem- 
ber 3, 1943 (Mark Taylor) on indefinite loan to USNM from NCS. 
D. selvanus, n. sp., is very closely related to D. manni, n. sp., from which it 
may be distinguished by its less extensive dark markings of the forewing, the 
longer jugal lobe of the hindwing, the truncate apex of the pygofer process, 
the narrower dorsal aedeagal lobe, and its narrower basal ramus of the para- 
physes. 
Dilobopterus lucentis, NEW SPECIES 
FIGURE 89, PAGE 127 
Length of male 7.5 mm. Head with median length of crown two-thirds 
interocular width and slightly more than one-third transocular width, an- 
terior margin more produced than in D. axillans, n. sp., with anterior margin 
very broadly rounded in dorsal aspect; lateral clypeal sutures attaining ocelli 
(type) or not. Forewing entirely membranous, veins distinct; hindwing with 
jugal lobe enlarged. Other external characters as in axillaris. 
Pygofer and plates as in D. demissus (Fabricius) (fig. 92c); style extending 
posteriorly much beyond apex of connective, with a distinct preapical lobe; 
connective subtriangular, with a median keel; aedeagus symmetrical, without 
processes; aedeagus with dorsoapical portion expanded dorsally considerably 
beyond gonopore, but not separated from shaft by an excision; paraphyses 
consisting of a pair of asymmetrical rami arising near base (fig. 89h). 
Crown, pronotum, and scutellum tan, crown with a median and two lateral 
submarginal spots and area around ocelli narrowly, pronotum with a pair of 
discal spots, a longitudinal vitta on each side near lateral margin, and 
posterior margin broadly, black; forewing unmarked; hindwing with ante- 
apical portion of jugal lobe black, extending posteriorly almost as far as claval 
apex of forewing with wings in rest position. Face, thoracic pleura and sterna, 
pale yellow with a median elliptical black spot near base of clypeus. 
Holotype male, Bartica, British Guiana, June, 1920, (inner apical cells of 
forewings missing) (AMNH). One damaged specimen, hindlegs covered with 
mold and with abdomen missing (ZIMH). 
Dilobopterus lucentis, n. sp., in external appearance is most closely related to 
D. bimaculatus Signoret. It differs from the Signoret species in that the dorsal 
lobe of its aedeagus is not nearly as distinct from the aedeagal shaft, in that 
the pygofer is more produced posteriorly, in its unpaired median spot of the 
crown and its paired lateral submarginal spots of the crown, in its paired sub- 
lateral pronotal vittae, its dark posterior pronotal margin, its lack of markings 
on the scutellum and the lack of a fuscous apical portion of the forewing. 
Dilobopterus myersi, NEW SPECIES 
FiGuRE 73, PAGE 118 
Length of male 7.4 mm, of female 7.9 mm. Head with median length of 
crown one-half or slightly less than one-half interocular width and ap- 
proximately three-tenths transocular width, anterior margin broadly rounded 
