268 
WILLIAM G. DIETZ, M. D. 
O. 11 . sp. Plate vii, fig. 36. — Suhovate, robust, very convex, black 
and shining; very sparsely clothed with short, pale, suberect puliescence. Beak 
cylindrical, shining, suhstriate and rather coarsely punctured, esjiecially near the 
tip. Antennae entirely pale testaceous, very slender ; scape shoi t, funicle 7-jointed. 
first joint long, second and third elongate, subequal, joints 4-7 shorter, rounded : 
clava elongate. Prothorax wider than long, and nearly twice as wide at base 
than at apex, sides oblique, nearly straight, feebly constricted at tip, hind angles 
acute, punctures moderately large and rather remote, each bearing a short 
whitish hair. Elytra broadly oval, very convex, not much wider at base than 
the prothorax ; humeri prominent, callous and lounded ; striae rather fine, punc- 
tures small and not closely approximate; interspaces slightly convex, smooth 
and shining, each with a row of fine, remote punctures bearing a short, hair: 
the ninth interspace near the base is produced in the form of a short, acute spine 
directed forward ; under surface a little more densely and coarsely pubescent ; 
hind femora scarcely incrassate; tarsi pale rufous. Long. 2.3 mm. ; .09 inch. 
Hab. — Allegheny, Pa. A single female specimen. Collected and 
kindly given me hy Dr. Hamilton. 
Very ditferent from any other Orchestes known to me and re- 
markable for its very convex form, shining surface, acute posterior 
thoracic angle, and the acute spine of the ninth intersjtace. 
O. puberiiliis Boh. — Elongate oval, black, anteniiie and legs testaceous, 
densely clothed with long, coarse, gray or yellowish gray pubescence; funicle 6- 
jointed; scutellum clothed with white pubescence. Elytra regularly oval, hu- 
meri rounded, not at all prominent. Long. 3.2—4 mm.; .12 — .16 inch. 
Hab. — California. 
Easily known by its coarse, yellowish pubescence. 
O. caiiti«« Horn. — Similar in form to the preceditig species, hut the humeri 
are more prominent. Black, autemife rufo-piceous ; t>'Jhescence short, sparse, 
whitish. Prothorax punctured, punctures rather crowded and irregular. Elytral 
interspaces rugulose. roughened with some lustre. Long. 2.8 — 3.2 mm. ; .11 — 13 
inch. 
Hab. — Michigan, Colorado. 
Re.sembles 0. stigma Germ, of Eurojte, but the pubescence is white 
or yellowish, and the elytral strite are less deejtly impressed. 
O. pallicoi’iiis Say. — Similar to canus, but a trifle smaller, with the humeri 
still more prominent. Black, antennae and tarsi reddish. Prothorax less densely 
punct\ired, punctures less irregular; the elytral interspaces are nearly smooth 
and more shining. Long 3 mm. ; .12 inch. 
Hab. — Atlantic States to Texas, Michigan. 
beluleti Horn. — Somewhat elongate-oval ; black, elytra and abdomen 
bright red; pubescence sparse, almost impercei>tihle. Prothorax coarsely and 
remotely jmnctnred. Long. 2.8 mm. ; .11 inch. 
Hab. — jMaryland, District of Columbia. 
Easily recognized by its striking coloration. 
