506 N. C. AGR. EXP. STA. BUL. 239 
each equidistant from median line of crown and adjacent anterior eye angle, 
crown with a shallow concavity extending forward from between ocelli and 
broadening behind apical margin, antennal ledges with anterior margins con- 
cave in lateral view; clypeus flattened medially, muscle impressions not dis- 
tinct; face slightly pubescent beneath. Thorax with dorsopleural carina ex- 
tending anteriorly as far as eye margin; forewing coriaceous with veins indis- 
tinct. Other external anatomical characters as in M. retrorsa, n. sp. 
Male pygofer strongly produced, dorsoapical margin subangularly round- 
ed, with a few anteapical macrosetae, without processes; plates not extending 
as far posteriorly as pygofer apex, without a distinct dorsal lobe in lateral 
view, each abruptly tapered anteapically in ventral view, and with a number 
of small macrosetae; style extending posteriorly much farther than apex of 
connective, without preapical lobe, abruptly narrowed before apex which is 
curved at right angle to axis of shank; connective Y-shaped with arms very 
broad and widely divergent; aedeagus arched ventrally, thence dorsally at 
apex which is expanded, without processes; paraphyses absent. Female 
unknown. 
Crown, pronotum, and scutellum orange with poorly delimited fuscous 
markings on midline and on each side of crown, pronotum with posterior 
margin broadly bordered with fuscous; forewings fuscous with bases, and 
areas in a number of cells, yellow to orange; clypeus deep red except area 
bordering dorsal carina where it is yellow and marked with an apical and two 
lateral black spots, genae and lora black; thoracic pleura yellow, marked with 
castaneous and black, legs yellow. 
Holotype male and one additional male, Callanga, Peru (USNM). 
M. callangana, n. sp., is very closely related to retrorsa, from which it may be 
distinguished readily by its lack of aedeagal processes. 
Mesogonia itaitubana, NEW SPECIES 
FiGuRE 417, PAGE 507 
Length of male 7.5-7.8 mm. Head with median length of crown from 
slightly less to slightly more than six-tenths interocular width and from 
slightly less than one-third to approximately four-tenths transocular width, 
ocelli each slightly closer to median line than to adjacent anterior eye angle, 
crown with shallow concavity extending from between ocelli forward and 
broadening behind apical carina; face pubescent beneath. Forewing trans- 
lucent with veins distinct. Other external structural characters as in M. 
retrorsa, n. sp. (p. 489). 
Male pygofer slender and very strongly produced, sharply rounded at apex, 
with a small number of anteapical macrosetae, without processes; plates not 
extending as far posteriorly as pygofer apex, each with a large dorsal lobe in 
middle third in lateral view, each very abruptly narrowed anteapically in ven- 
tral view, the apical portion slender, parallel-sided, and obliquely truncate, 
without macrosetae; style extending posteriorly much farther than apex of 
connective, with a distinct preapical lobe, beyond which distal portion of style 
