(Proceedings submission caseby-case

DEUVE ET AL.: CARABID BEETLE FAUNA OF THE GAOLIGONG MOUNTAINS 375
DERIVATION OF SPECIES NAME.— The species epithet, balli, is the Latinized form (in the genitive
case) of the surname of George Eugene Ball, Professor Emeritus at the University of Alberta,
Edmonton, Alberta, Canada — our mentor, dear friend, and one of the world’s most accomplished
and inspirational systematists. we are pleased to name this extraordinary species in his honor.
DIAGNOSIS.— Adults of this species (Fig. 14a) can be distinguished from those of all other trechine
species in the region by the combination of character states noted in the diagnosis for this
genus.
DESCRIPTION.— Size moderate, BL = 4.3 to 4.8 mm. Color of dorsum dark, forebody dark
reddish brown, elytra piceous to black, antennae and legs reddish brown, palpi slightly paler, reddish
tan; surface smooth and markedly shiny.
Head. Slightly elongate, with eyes small but convex, their diameter less than length of tempora.
Tempora not or only slightly convex, glabrous, and joined to neck region at a markedly obtuse
(ca. 150°) angle. Frons with deep frontal furrow that delimit three (two lateral and medial) very
convex areas, however furrows abruptly interrupted or less impressed posteriorly; two pairs of
supraorbital seta present, the anterior pair inserted near middle of eyes, the posterior pair inserted
dorsally on the tempora near the postocular furrow. Clypeus with four setae. Labrum with six setae,
anterior margin distinctly concave. Right mandible tridentate, with the middle tooth reduced,
obtuse, left mandible with premolar tooth fused with retinaculum to form a small caniniform
process with a sharp tip. Mentum and submentum fused. Mentum with medial tooth broad, truncate,
about half as long as lateral lobes, the latter apically pointed. Submentum with six setae anteriorly.
Genae with a single ventral seta on each side. Antennae pubescent from apical half of scape
distally, extended posteriorly to basal one-third of elytra, with four antennomeres posterior to the
pronotal base, antennomere 3 slightly longer than antennomere 4.
Pronotum. Narrowly cordate, not transverse, about as long as wide (Pw/PL = 1.0), markedly
narrowed posteriorly, the lateral margins distinctly sinuate anterior to basal angles, the latter acute,
projected, but without digitiform extensions. Disc markedly convex, globose, glabrous; median
longitudinal impression faintly impressed; basal foveae formed as small, deep, circular pits, median
basal area smooth, faintly delimited, basal margin dilated medially as a broad, round projection.
Lateral margination narrow, evident only in anterior one-third, effaced in posterior two-thirds. Two
or three anteromedial setae and a single basal seta present on each side, the latter inserted slightly
but distinctly anterior to basal angle.
Elytra. Elytral silhouette tear-shaped, narrower anteriorly than posteriorly, widest distinctly
posterior to middle, humeri effaced, basal part of lateral explanation not visible from above. Disc
markedly convex and smooth, with basal part abruptly and truncate, concave, fitted to convex base
of pronotum, without distinct discal striae, except recurrent stria short but evidently impressed.
Parascutellar setiferous pore present. Four to six discal setae present and aligned near presumed
location of stria 3. Preapical seta present, inserted slightly more medially than the row of discal
setae. Umbilicate setal series with setae of humeral group aggregated with distance between first
and second setae less than between second and third and third and fourth, setae of median group
distinctly posterior to middle.
Legs. Moderately long but slender; protibiae with longitudinal furrow, sparely pubescent apically
on anterior surface. Male protarsomeres 1 and 2 dilated and apicomedially toothed.
Abdomen. Abdominal ventrites glabrous, except for a single paramedial seta on each side and
ventrite VII of females with two setae on each side.
Male aedeagus. Median lobe (Fig. 14b) slender, bent basally about 90° to shaft, basal bulb with
a large sagittal aileron, apex short and slightly narrowed, blunt; endophallus with a pair of slender
sclerites tapered to points on both ends.