Lachesilla blandfordi, García Aldrete, 2017

García Aldrete, Alfonso N., 2017, New species of Lachesilla (Psocodea: Psocomorpha: Lachesillidae), in species group corona, from southern Mexico and Central America, Zootaxa 4347 (2), pp. 201-227 : 202-204

Lachesilla blandfordi n. sp. Female

( Figs 4–7 )

Diagnosis. Subgenital plate posteriorly concave, flap long, proximally narrow, with antero-lateral corners slightly projected outward, flap widening distally, posterior border rounded. Ninth sternum anteriorly straight, flanked by rounded areas with pigmented striae. Gonapophyses stout, distally rounded, with a pigmented band along outer border, slightly projected proximally.

Description. Color (43 years in 80% ethanol). Body tawny brown, compound eyes black, ocelli hyaline, without pigmented centripetal crescents. Maxillary palps dark brown. Antennae and legs pale brown. Wings hyaline, with a faint orange hue, veins brown. Abdomen whitish, with dark brown subcuticular rings, faded ventrally.

Morphology. As in diagnosis, plus the following: Forewing pterostigma elongate, wider posteriorly, Rs-M fused for a short distance, areola postica broadly triangular, apically rounded ( Fig. 4 ). Subgenital plate broad, distally glabrous, setae as illustrated ( Fig. 5 ). Gonapophyses ( Fig. 6 ). Ninth sternum broadly pentagonal, posterior half unpigmented, spermapore with a sclerotized rim ( Fig. 6 ). Paraprocts ( Fig. 7 ) semi-elliptic, setae as illustrated, sensory fields with ten trichobothria. Epiproct ( Fig. 7 ) wide, straight anteriorly, rounded posteriorly, with a field of setae on distal half.

Measurements. FW: 2105, HW: 1614, F: 405, T: 723, t1: 238, t2: 97, ctt1: 12, Mx4: 109, f1: 184, f2: 166, f3: 149, f4: 115, f5: 83, f6: 60, f7: 59, f8: 67, f9: 70, IO: 349, D: 153, d: 100, IO/d: 3.49, PO: 0.65.

Specimen studied. Holotype female. GUATEMALA. 4 km SE Patzún. 29.viii.1973. On Pinus sp. dead leaves. A. N. García Aldrete ( CNIN).

Etymology. This species honors the memory of W. F. H. Blandford, co-author of the Insecta. Coleoptera . Rhynchophora. Volume IV, Part 6 (1895–1907), of the Biologia Centrali-Americana.

Remarks. This species differs from the females of the other species in the group by the shape and size of the flap of the subgenital plate, and by the distinct, rounded striated areas that flank the anterior half of the ninth sternum.

Figures

FIGURES 4 – 7. Lachesilla blandfordi n. sp. Female. 4. Fore- and hind- wings. 5. Subgenital plate. 6. Gonapophyses and ninth sternum. 7. Epiproct and right paraproct. Scales in mm. Figures 6 and 7 to common scale.