(Proceedings submission caseby-case

346 PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES
Series 4, Volume 63, No. 12
ured transversely at the widest point on the pronotum; and pronotal length (PL), measured longitudinally
between the anterior and posterior pronotal margins along the midline. The means of
these measures were combined in the ratio, Pw/PL, as an indicator of pronotal shape for each
species.
DISSECTIONS OF MALE GENITALIA.— Urite IX (the “ring sclerite”) and aedeagus were extracted
as a unit manually by using a sharp point to slit the intersegmental membrane between segments
VIII and IX. The dissected assemblage was then placed in a dilute solution of KOH at room temperature
for 24 hours. After rinsing in water, the dissections were dehydrated using 95% EtOH,
then urite IX was separated from the aedeagus by severing the connecting membranes. The parts
were then mounted in a Euparal preparation between two small coverslips over a hole in a small
card and pinned beneath the specimen.
ILLUSTRATIONS.— Digital images of whole specimens and particular structures were taken
using a Leica imaging system including an M165C dissecting microscope, DFC550 video camera,
and two KL1500 LCD light sources. Stacked images were captured and combined into single montage
images using the Leica Application Suite V4.2.0. Plates of images were created using Adobe
Photoshop CS5. Distribution maps for each species were generated from geographical coordinate
data maintained in a Biota Version 3.0 database (Colwell 2012) using the ArcMap program in
ArcGIS for Desktop Version 10.2 software from Esri.
GEOGRAPHICAL COORDINATE DATA.— All geographical coordinate data are presented in decimal
degree format, with the first entry degrees North and the second degrees South, separated by
“/”. Exceptions to this format include verbatim label data only.
TREATMENTS FOR NEW SPECIES.— For all new species, label data for all specimens of the type
series are quoted verbatim (between quotation marks), with data for multiple labels separated by
“/” and any editorial additions included between brackets (“[-]”).
TAXONOMY
Adult specimens of trechine species represented in the Gaoligong Shan region can be distinguished
using the keys provided in this paper. Each key is provided only for distinguishing members
of taxa (different genera or species) represented in this region and may not be appropriate for
more general use.
Key for Identification of Adults of Trechine Genera of the Gaoligong Shan Region
1. Dorsal surface covered with fairly long pubescence; eyes also pubescent . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Perileptus Schaum
1’ Dorsal surface glabrous except for isolated fixed setae typical for trechines; eyes also
glabrous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2(1’) Mentum and submentum fused or at least partially fused . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2’ Mentum and submentum not fused, separated by a distinct suture . . . . . . . . . . . . . . . . . . . 5
3(2) Body length (BL) less than 3 mm, the protibiae not furrowed . . . Minutotrechus gen. nov.
3’ BL more than 4 mm, the protibiae longitudinally furrowed . . . . . . . . . . . . . . . . . . . . . . . . 4
4(3’) Fully winged, elytra with discal striae distinctly impressed. . . . . . . . Agonotrechus Jeannel
4’ Apterous, elytra with discal striae effaced . . . . . . . . . . . . . . . . . . . Queinnectrechus Deuve
5(2’) Form slender and flattened, the pronotum relatively small; antennae long and slender,
extended nearly to the apical one-fourth of the elytra . . . . . . . . . . . . . . . . Eocnides Jeannel
5’ Form more compact and convex, the pronotum average size; antennae shorter, extended
only to the basal one-fourth of the elytra or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6