314 
GEO. H. HORN, M. I). 
ineiit serrate at sides near apex, vertical portion of segments sparsely pubescent; 
pygidiuin coarsely i)unctate, the carina not projecting; claws cleft near the tip, 
forming a broad tooth. Length .32 — ..36 inch. ; 8 — 9 inm. 
Male. — Prosteriiuni rather Hat, densely j)unctate, finely pubescent. 
Female. — Prosteriiuni more convex, more sparsely punctate and 
shining, not pubescent. 
Variations. — Nothing has been observed, except in the color. 
The elytra have been described as serrulate, but this is an error 
of observation, from the fact that the sides of the last ventral are 
rather strongly serrate, a rather unusual character not heretofore 
recorded in our species. 
Hab. — Kansas, Texas, Arizona and southern California (Ulke). 
A. nintieus Lee. — Form rather robust, color ])liimheous, or with slight 
bluish lustre. Anteniiffi scarcely attaining the middle of the thorax, piceous, 
serrate from the fourth joint; head convex, front alone impressed along the 
middle, the surface densely punctate. Thorax nearly square, sides slightly sin- 
uous, margin sinuate, hind angles slightly everted and with a feeble straight 
carina, disc convex, a vague median depression near the base, lateral depressions 
feeble, surface densely punctate with a finely strigose arrangement; elytra sin- 
uate behind the humeri, very feebly dilated behind the middle, apices slightly 
sinuate, not serrulate, disc slightly flattened, basal depressions feeble, surface 
densely, finely, imhricately granulate ; scutellum not transversely carinate ; body 
beneath more shining than above; prosternal lobe truncate, or slightly emar- 
ginate, intercoxal process broad, slightly broader at apex and emarginate; pro- 
pleurse and sides of metasternum densely punctate, the latter slightly strigose. 
Abdomen finely not closely punctate, more closely at the sides and on the first 
segment, vertical portion of segments pubescent, but not conspicuously; last 
segment very finely serrulate at sides near apex ; pygidium punctate, indistinctly 
carinate at middle; claws cleft, the lower portion forming an acute tooth. Length 
.28 — .35 inch. ; 7 — 9 mm. 
Male. — Prosternum more densely jtunctured and subopaque, pu- 
bescent; metasternum flat, first ventral segment vaguely sulcate at 
middle, densely punctate, slightly pubescent. 
Female. — Prosternum less closely jninctate and less pubescent ; 
metasternum less flattened ; fir.st ventral convex at middle. 
Variations. — This species seems remarkably constant in form and 
color, varying only in size. The carina of the hind angles is at most 
feeble and specimens occur without any trace of it. 
Hab. — Kansas to Texas. 
A. jaeobiims ii. sji. — Form cylindrical, moderately robust iu facies, faintly 
cupreous, inclining to plumbeous, subopaque. Anteunse rather short, scarcely 
attaining the middle of the thorax, piceous, slightly cupreous, serrate from the 
fourth joint; head convex, with a slight median depression from the occiput to 
