Memoirs on the coleoptera

138
MEMOIRS ON THE COLEOPTERA
much more convex than in the preceding, distinctly alutaceous,
sparsely, very finely punctate, rather abruptly but not very widely
deplanate and transversely rugose at the sides, the plane just visibly
inclined upward, the edge moderately thick and uneven; elytra
two-fifths longer than wide, three-fifths or more wider than the
prothorax, widest at three-fifths, the sides arcuate throughout,
rapidly rounding in posteriorly, the apical lobe relatively rather
small; surface very even throughout, without trace of costuliform
lines, more strongly convex and more steeply declivous at the sides
posteriorly than in caliginosus and quite evidently impressed
along the suture except basally and apically, very strongly shining,
only very finely and sparsely creased, the punctures small, very
sparse though rather deep and distinctly defined; lateral reflexed
carina ending abruptly at apical fifth; abdomen polished, very
minutely, remotely punctulate; legs slender; tarsi short. Length
(9 ) 33.0 mm.; width 12.2 mm. Arizona (Baboquivari Mts.).
satiatus n. sp.
10 Form moderately stout, decidedly convex, black, the entire elytra dark
red-brown; head impressed, strongly but sparsely punctate; prothorax
large, a third to two-fifths wider than long, three-fourths (a 71
) to threefifths
( 9 ) as wide as the elytra, parallel and very moderately arcuate
at the sides, shining, subalutaceous, strongly convex, minutely and
sparsely punctate, the sides reflexed and coarsely, transversely rugose;
basal impression rather transverse, well marked; elytra twothirds
longer than wide, more oval and rounded at the sides in the
female, widest behind the middle, the apical lobe short but evident,
obtuse; surface strongly, evenly convex transversely, closely rugose
and not or but feebly shining, each with three low obtuse discal
costae, the outer joining the margin at basal fourth or fifth, the first
and second approximate at base, uniting on the declivity, the single
feeble line then joined by the third ridge; sutural margin also subsimilarly
elevated, nearly smooth, diverging from the suture basally
and joining the first costa at the basal margin; intervals elevated,
more or less along their median lines, sometimes forming broader
and feebler costae; side margin ending at apical fifth; abdomen finely,
sparsely punctate and also with extremely minute, close-set punctulation;
legs moderate, the tarsi shorter in the female as usual.
Length (cf,9) 23.0-24.0 mm.; width n.o mm. Arizona (Peach
Springs), H. F. Wickham rugatus n. II
sp.
Elytra very roughly, coarsely and densely punctato-rugose. Mod-
erately ventricose and flattened above, dark piceous-brown throughout;
head rather feebly impressed, coarsely, deeply, rather closely
punctate; prothorax dull in lustre, two-thirds as wide as the elytra
in both sexes, two-fifths wider than long, broadly and moderately
convex, coarsely, deeply, closely but unevenly punctate, with a very
feeble and obsolete impression at each lateral fourth just behind the
middle, the basal impression deep and distinct; sides parallel, moderately
arcuate and reflexed, coarsely, transversely rugose, the
edges finely, irregularly crenulate; elytra faintly shining, widest