202 Trans. Acad. Sct. of St. Louis. 
form and sculpture, the antennae slender and only just visibly incras- 
sate distally; prothorax obviously narrower than the head and distinctly 
longer than wide, the nearly straight sides just perceptibly converging 
from the broadly and obtusely rounded anterior angles—at apical 
fourth or fifth—to the base; elytra convex, polished, finely, sparsely 
punctured, only very slightly longer than wide, not quite one-half 
wider and only about a fourth longer than the prothorax; gular sutures 
subobliterated. Male with the fifth segment wholly unimpressed, the 
apex broadly, feebly sinuato-truncate; sixth segment with a rounded 
sinus between two and three times as wide as deep, the adjoining 
surface feebly impressed in the middle, the impression gradually 
evanescent anteriorly. Length 3.0 mm.; width 0.6 mm. California 
(Dunsmuir), — Mr. Wickham..e.essesececescoecevees COFrViCHIA DB. Sp. 
Fifth segment of the male lobed in the middle at apex and longitudinally 
impressed, the impression longitudinally divided at base by a short 
median raised line and becoming posteriorly a spoon-shaped depression, 
limited at the sides by acutely elevated folds; sixth ventral with a deep 
oblong-elliptical emargination, which is widest at the middle of its 
depth, the surface in front of the emargination with a triangular impres- 
sion having abruptly limited side margins; hind femora stouter than 
usual and fully as broad as the anterior. California (Marin Co.). 
femoratus Fall 
I am obliged to place femoratus at the end of the table, as 
no characters are given under the original description enabling 
me to codrdinate it with the other species. Its sexual charac- 
ters are so distinct that there will be no trouble in identify- 
ing the male if found. obustulus closely resembles punctatus 
but is larger and stouter and has the legs notably stouter. A 
specimen from Truckee, before me, may possibly represent 
the montanus, of Fall, but it seems to be rather smaller, being 
2.8 by 0.55 mm. in size, the prothorax obviously narrower 
than the head, although less so than in most of the species, 
and the triangular notch of the sixth segment is wider than 
deep, with its anterior angle well rounded, the transversely 
rounded part being about a fourth as wide as the entire notch. 
Pailidus has male sexual characters greatly resembling those 
of punctatus, but the less abruptly truncate lobe of the sixth 
seoment is relatively still larger, being nearly a third as wide 
as the segment and the gular sutures are more widely sepa- 
rated; these characters, in conjunction with the smaller size 
and different coloration, will readily distinguish the two 
