1967] 
Mockford — Electrentomoid Psocids 
149 
tip of areola postica extending up across cell M 3 another along vein 
Cuja, another through nodulus. Hindwing washed with pale brown, 
unmarked. 
Female. — Measurements (Table I). 
Morphology. — Anterior femur with many more denticles in row 
than in male (39 in single femur observed). Subgenital plate (fig. 
86) with posterior margin tapering toward apex, the apex bearing 
two long, stout setae; T-shaped sclerite with pair of lateral extensions 
arising along stem near its base. Ovipositor valvulae (fig. 87). 
Spermatheca (fig. 88) with no constriction separating the two regions 
of its sac; basal region very small; wall of sac beset with small rings 
of minute, inward-directed spines; sclerite of spermathecal orifice a 
V-shaped structure with a sclerotized band bisecting the angle of 
the V; actual orifice near apex of the V. Paraproctal sensorium with 
12-13 setae, none with well developed basal rosettes. 
Color (in alcohol). — Head, legs, and mesothoracic dorsum dark 
brown. Compound eyes gray showing faintly three transverse brown 
bands. Metathorax dorsally and entire thorax laterally medium 
brown. Preclunial portion of abdomen ventro-laterally medium 
brown with reddish hue, pale brown dorsally and ventrally. Sub- 
genital plate and clunium medium brown mottled with darker brown. 
Wings marked as in male, the pale brown areas of forewing with 
silvery sheen in reflected light. 
Type locality. — Barro Colorado Island, Panama Canal Zone. 
Records. — Mexico. Chiapas : Palenque Ruins. Panama Canal 
Zone. Fort Sherman. 
Habitat. — Mexican specimens, two females and seven nymphs, 
were taken on trunks of large forest trees with buttressed bases. They 
sit on the surface of bark and run rapidly when disturbed. 
Genus Electrentomopsis, new genus 
Diagnosis. — Antennae of 13 segments. Frons only very slightly 
longer than postclypeus in anterior view. Micro-vestiture of fore- 
wing minute points. Spermathecal duct coiled spring-like. 
Type species. — E. variegatus J new species. 
Electrentomopsis variegatus, new species 
Male. — 'Measurements (Table I). 
Morphology. — Pit containing antennal base particularly deep and 
conical as seen in cleared head. Sculpture of integument of frons and 
vertex a net of polygonal areas (mostly hexagonal) set off by lines. 
Compound eyes with transverse rows of scattered tiny setae. Lacinial 
