Description

Male. Color. Body tawny brown, compound eyes black, legs pale yellow, forewings pale yellow, veins pale brown (Fig. 6), hindwings yellowish, almost transparent. Tergal lobes of meso- and metathorax pale brown, abdomen creamy, with pale brown, subcuticular, transverse bands. Clunial projection creamy, with brown border; epiproct creamy with border pale brown, paraprocts creamy with a circular area pale brown. Hypandrium pale brown. Morphology. As in diagnosis plus the following: Head vertex slightly concave in the middle (Fig. 7). Upper border of compound eyes not reaching the level of the vertex. Forewing L / W: 2.47 (Fig. 6). Forewing pterostigma elongate, wider distally, lp / wp: 3.26, without setae in the membrane. Areola postica triangular (Fig. 6). Hindwing L / W: 2.76 (Fig. 6). Clunium projected over the bases of epiproct and paraprocts (Fig. 8); projection over the epiproct concave, with postero-lateral corners rounded; projection over each paraproct rounded (Fig. 8). Phallosome (Fig. 9), with aedeagal arch narrow, projected posteriorly, the projection about as long as each arm; external parameres slender, with spiny apices curved outwards. Paraprocts (Fig. 8), broad, with few setae; sensory fields with 15 – 16 trichobothria on basal rosettes. Epiproct (Fig. 8), wider than long, posteriorly rounded, setae as illustrated. Measurements (in microns). FW: 2650, HW: 2000, F: 650, T: 1037, t 1: 375, t 2: 125, ctt 1: 19, Mx 4: 160, f 1: 510, f 2: 410, f 3: 325, f 4: 270, f 5: 160, f 6: 150, f 7: 140, f 8: 130, f 9: 120, f 10: 110, f 11: 120, IO: 350, D: 190, d: 140, IO / d: 2.5, PO: 0.73. Female. Color. Same as the male. Subgenital plate apically hyaline, pigmented area anteriorly concave. Morphology. Head as in the male. Forewing L / W: 2.52 (Fig. 11). Pterostigma, lp / wp: 3.30. Areola postica as in the male (Fig. 11). Hindwing L / W: 2.83 (Fig. 11). Subgenital plate broad, triangular, densely setose, with posterior border acuminate (Fig. 14). Paraprocts broad, elongate, with field of short setae posteriorly, and with macrosetae anteriorly; sensory fields with 14 trichobothria issuing from basal rosettes (Fig. 13). Epiproct anteriorly straight, posteriorly rounded; setae as illustrated. Measurements (in microns). FW: 2775, HW: 2125, F: 650, T: 1037, t 1: 375, t 2: 125, ctt 1: 20, Mx 4: 155, f 1: 550, f 2: 415, f 3: 340, f 4: 260, f 5: 155, f 6: 140, f 7: 130, f 8: 120, f 9: 110, f 10: 105, f 11: 120, IO: 400, D: 190, d: 130, IO / d: 3.07, PO: 0.68. Specimens studied. Holotype male. MEXICO. Oaxaca. Sierra Juárez. Santa Catarina Lachatao, “ Las Vigas ”, 17 ° 11 ’ 17 ” N: 96 ° 27 ’ 13.5 ” W, 2790 m), 27. VIII. 2013, beating shrubs with dead, hanging leaves, J. A. Casasola González. Paratypes: 1 female, same data as the holotype.

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta

Order: Psocodea

Family: Lachesillidae

Genus: Prolachesilla

Species: Prolachesilla casasolai Sandoval Arango, González-Obando & García-Aldrete, 2017