Some web-building spiders, including those in the genus Storena, even have underfocused and therefore only crudely image-forming eyes (Land, 1985), reminiscent of the optics of the dorsal ocellar
system in some insects (Goodman, 1981).
Plate V: Features around the ocellar
triangle and the metanotum 10a.
rayahdensis are bare and not clothed with long erect and tufted black hairs, and neither the ocellar
tubercle nor the occiput bear long erect black hairs as in P.
Head higher than wide in frontal view, in lateral view eyes occupying more than half of the top of the head, crest and ocellar
tubercle well developed (Fig.
Abbreviations are as follows: OOL, ocellar
-ocular distance; POL, post-ocellar
distance; OL, ocellar
line; OPL, ocellar
-occiptal line; Rs, radial vein.
Face, frons and vertex dull gold pruinose, mystax orange-yellow, ocellar
quimbaya is easily differentiated from the female of Batrachophthalmum rufiventre, by having ocellar
seta reduced; orbital seta present; lateral vertical seta reduced, almost indistinguishable from setulae around it; one dorsocentral seta; wing with wide and discontinuous median band; abdomen and legs brown, except mid tarsomeres and apical half of hind tibia yellow and hind tarsomeres whitish.
DESCRIPTION: Head: Clypeus (tylus) unarmed, apically globose, weakly raised, extending anteriorly to and laterally weakly higher than juga; juga unarmed; antennal segment I stout, thickest, slightly curved outward, attenuated at base, and shorter than maximum length of head; segments II and III slender, cylindrical, and IV fusiform and barely thickened; each antennal segment clothed with scattered, short, semidecument, silver, bristle-like setae; antennal segments I to III densely tuberculate; ocellar
tubercle barely raised; postocular tubercle protuberant; labial segment I short, reaching posterior half of head.
rufipes, the erect hairs of these areas are in general long and abundant; on vertex and preoccipital border at least as long as median ocellar
diameter; on mesoscutum present along anterior margin as well as on anterior one-third of disc medially; on disc of mesoscutellum abundant, about as long as (about twice as long as median ocellar
diameter) or slightly shorter than those on the distal margin.
Species of Stenomicra differ from other Periscelididae by the presence of two reclinate fronto-orbital setae (lower seta occasionally mesoclinate); frons lacking interfrontal setae; ocellar
setae absent; postpronotum lacking a well-developed seta; eyes microsetulose, sometimes sparsely so; katepisternum bearing 1 prominent seta; hindfemur lacking anterodorsal, preapical seta; supra-alar seta lacking; lateral scutellar setae 1 pair, apical; wing with anal lobe greatly reduced; costa long, extended to vein M; alula indistinct; vein CuA2 weak or lacking; cell cup usually lacking (Mathis & Rung, in press).
Abbreviations used in the descriptions are: F, S, T, OD and PW for antennal flageller segment, metasomal sternum and tergum, ocellar
diameter, and puncture diameter, respectively.
65 wide near front of coxae III, where widest, reddish orange, darkest posterolaterally, without deep pits; pale ocellar
areas obsolete, covered (like most of surface) with white, calyx-shaped, scale-like setae; tiny tubercles (about one-fifth size of scale-like setae) scattered over most of surface; with three depressions: one along midline, one on each side occupying middle one-third of length.