Clypeus usually sparsely punctate in its upper part and impunctate in lower part.
Face, frons, mesoscutum, mesopleuron and dorsolateral area of propodeum often impunctate or with fine and sparse punctures 5
The similarity of Tyronella to impunctate
orthide brachiopods such as Toxorthis (Temple 1968) has been discussed by Rong (1984).
puncturing distinctly darker and scutellum narrow with fine impunctate
Ventral surface: pale brown, impunctate
, abdomen smooth and shining.
Corium and clavus thickset with pit-like punctures, embolium and cuneus impunctate
Head: malar space less than quarter the width of base of mandible; clypeus with median apical rim and adjacent subapical area without distinct punctures, apical third of clypeus shallowly but distinctly impressed, sides of clypeus with 3 convergent striae composed of a few large elongate punctures separated by narrow impunctate
shining interstriae; facial fovea deep and wide above, extending to level halfway up lateral ocelli, upper margins of foveae sharply margined, not evenly intergrading with occiput, apically wider than antennal width at second flagellar segment.
DIAGNOSIS: Randallophorus is distinguished from other Pilophorini by the broad impunctate head; the strongly campanulate or bell-shaped, impunctate pronotum, with a large quadrate velvety spot on each callus; the slender subparallel body; the slender antennae; the scattered whitish, scalelike setae on the dorsum, ventrally on the pro-, meso-, and metapleura areas, abdomen, and ar the bases of the coxae; the simple ostiolar auricle with a wide scent channel lacking a distinct knob dorsally; and the simple, S-shaped endosoma lacking an apparent secondary gonopore.
Head: Slightly less than two rimes length, interocular width subequal to two rimes dorsal width of an eye; posterior area behind eyes narrowed, forming a short, indistinct neck in males; impunctate, shiny, frons with a few transverse rows of indistinct, dull spots; set with a few scattered, whitish scalelike setae on vertex, frons, and ventral surface.
Mentum widely concave, impunctate
, with scarce, slender setae at sides, anterior border broadly notched.
TEXTURE: Body impunctate
, polished, callosite region of pronotum, corium and abdominal terga weakly shagreened.
Gastral tergum I without punctures; terga II-IV with dense, fine punctures medially and posteriorly, impunctate
basally; tergum V with dense, fine punctures; pygidial plate elongate triangle, with dense, coarse punctures, and with long, yellow bristles (Fig.