Casey — A Revision of the American Paederint. 55 
anteriorly, feebly carinate posteriorly; pronotum very convex, ex- 
tremely minutely punctate, without much more than a narrow trace of 
a smooth median line, the surface prominent at the middle near the base 
and bi-impressed asin Scopaei; elytra much wider than the prothorax, 
nearly as wide as the head, closely punctate, the sutural bead evident; 
abdomen rather narrower than the elytra, the segments only feebly im- 
pressed at base; legs long, very slender, the tarsi long, filiform, the 
first and fifth joints elongate; sexual characters of the male consist- 
ing of feeble transverse folds on the second and third ventrals and 
apical emargination of the sixth. Amazon................*S§Scopaecodes 
Body very slender and of remarkably specialized structure throughout, 
scopaeoid in form, moderately convex, shining, finely, inconspicuously 
punctured, the head more coarsely and sparsely so throughout but more 
coarsely anteriorly than posteriorly; coloration pale; head elongate- 
oval, not abruptly narrowed before the eyes which are before the middle, 
rather small, prominent and very coarsely faceted; posterior outline 
semicircular, the median part of the base forming an abruptly project- 
ing collar inclosing the neck; sides without post-ocular foveolae but 
with a deep longitudinal groove extending along the lower margin of 
the eyes, and gradually becoming attenuated to the neck; upper margin 
of the eyes also bordered by a deep groove which does not extend be- 
hind the eye; front strongly tritumorose; labrum very short, biobliquely 
and rectilinearly truncate, with a feeble median sinus, edentate; men- 
tum very small; labial palpi slender, normal; maxillary palpi strongly 
specialized, the second joint slender, the third strongly inflated and 
rounded in outline but abruptly constricted at base and obliquely joined 
to the second by a slender peduncle; gular sutures completely united, 
forming a fine median stria anteriorly becoming a broad coarsely im- 
pressed groove posteriorly; mandibles bidentate within, the left at 
least strongly grooved externally; antennae rather thick, submoniliform, 
the basal joint cylindrical, thick and not much longer than the next two 
combined, the second and third subequal; prothorax elongate-oval, 
gradually attenuate anteriorly; prosternum extremely long before the 
coxae, almost evenly and strongly convex; pronotum tumid in the 
middle near the oase, the median impunctate line obvious; elytra wider 
but not longer than the prothorax, the sides diverging, obscurely 
punctulate, the surface impressed at each side of the suture toward 
base only; abdomen narrower than the elytra, the segments feebly im- 
pressed at base; legs moderately slender but not very long, the anterior 
tibiae strongly, obtusely dentate within, the intermediate slender and 
cylindric, the posterior gradually thicker from base to apex, the tarsi 
rather long, slender, the basal joint of the posterior about as long as 
the next two together but much shorter than the fifth; claws well devel- 
oped. Amazon. [= Sphaerinium Shp. — nom. praeocc. ]..*Sphaeronium 
The name Sphaeronium was substituted for the original 
Sphaerinium by Dr. Sharp, and the genus is founded upon a 
species described under the specific name pallidum by that 
author. The type of Scopaeodes—a name somewhat unfor- 
