1967] 
JMockford — Electrentomoid Psocids 
131 
Habitat. — ■ The single specimen was beaten from dried leaves of 
Heliconia in upland rain forest. 
Family Troctopsocidae, new name 
Plaumanniidae Roesler, 1940, nec Lundblad, 1936. 
Diagnosis. — Antennae of 11, 13, or 15 segments. Frontal sutures 
absent. Lacinial tip with medium cusp divided, lateral cusp with two 
or more prominent preapical denticles. Tarsi three-segmented. 
Pterostigma open or closed basally. Vein 2 A in forewing running 
from its origin a short distance along wing margin, then joining iA. 
First segment of Rs in hindwing present or absent. Third ovipositor 
valvula bilobed apically. 
Genus Protroctopsocus, new genus 
Diagnosis. — Antennae of 15 segments. Pterostigma closed basally. 
First segment of Rs present in hindwing. Adults ($) occurring in 
macropterous and ‘brachypterous’ forms, the latter with forewings 
not much shortened, but elytriform. Macropterous form with ocelli 
normal, these poorly developed in brachypterous form. Frons longer 
than postclypeus in anterior view. Pretarsal claw with 2 preapical 
teeth. Terminal segment of maxillary palpus slightly swollen near 
tip (fig. 46). 
Type species. — P. enigmaticus , new species. 
Protroctopsocus enigmaticus, new species ( 9 ) 
Macropterous Female. — Measurements (Table I). 
Morphology. — Tip of galea sculptured with reticulate pattern 
apparently formed by end views of closely packed column-shaped 
structures. Lacinial tip (fig. 28) with median cusp bidenticulate, 
having a small inner denticle and larger outer denticle; lateral cusp 
with apex apparently undivided ; 3 denticles before apex, 2 more 
basal ones arising about at same level, much smaller than more distal 
one. Row of 7 spines on anterior carina of first femur. Subgenital 
plate (fig. 37) with apex thickened, this portion bearing 4 stout 
Explanation of Plate 19 
Fig. 19. — Musapsocus birkenholzi, n. sp., $, clunial dorsum and epiproct. 
Fig. 20. — M. simlae, n. sp., 9, ovipositor valvulae. 
Fig. 21. — M. simlae, n. sp., 9, subgenital plate. 
Fig. 22. — M. creole, n. sp., 9, subgenital plate. 
Fig. 23. — M. tabascensis , n. sp., $ , clunial dorsum and epiproct. 
Fig. 24. — M. tabascensis, n. sp., 9, spermatheca. 
Fig. 25. — M. tabascensis , n. sp., 9, subgenital plate. 
