154 | | [SEPTEMBER, 
7th very little larger, globluar : S—10, one-half wider, rounded, somewhat trans- 
verse, 1!th nearly twice as long as the 10th and obtuse. Thorax not wider than 
the head, longer than wide, narrowed in front, very slightly narrowed on the 
sides, finely pubescent, disc a little flattened, finely impressed transversely neat 
the base. Elytra scarcely one-third wider than the thorax, and forming with it 
a very obtuse but distinct angle: elongate oval, dise flattened, finely pubescent, 
very obsoletely punctulate, base with a fovea inside of the humerus. Legs tes- 
taceous, anterior thighs strongly, posterior moderately incrassated. 
18. S.clavipes, piceus, capite glabro, thorace dense piloso, longiusculo, 
antrorsum angustato et. rotundato, basi transversim impresso, elytris rufescen- 
tibus parce pilosis, basi foveatis, antennis articulis elongatis, femoribus clavatis. 
Long. -05—:06. | 
Say. Long’s Exped. to St. Peter’s River, 2,272: Schaum, Anal. Entom. 18. 
Lake Superior, Georgia, Louisiana. A darker variety is 8. pilosicollis of ray 
catalogue of Lake Superior Coleoptera in Agassiz? Lake Superior. The head is 
smaller in this than in the preceding species, oval, and glabrous; the elongate 
slender antennz will also easily distinguish it; their four last joints are nearly 
one half thicker than those which precede, and are also longer than wide. The ~ 
female has broader elytra than the male, and somewhat shorter antenne. 
19. S. consobrinus, nigro-piceus, capite glabro, thorace longiusculo, 
piloso antrorsum angustato et rotundato, basi transversim impresso, elytris parce 
ae basi foveatis, antennis articulis penultimis rotundatis, femoribus clavatis. 
ong. *05. 
One specimen, New York. In form this species is precisely similar to the 
preceding, but the difference in the antenne seems sufficient to separate it. These 
organs are here somewhat longer than the head and thorax; the joints 3—-6 are 
equal closely connected, and not longer than wide; the seventh is a little larger 
and slightly conical; 8th, 9th and 10th are rounded, not longer than wide; the 
11th one half longer and subacute. 
20. S. bicolor, elongatus, piceus, capite glabro, thorace piloso elongatos 
subcampanulato, basi transversim impresso, elytris parce pilosis, non foveatis, 
palpis pedibus antennisque testaceis, his articulis rotundatis, penultimis subtrans- 
versis. Long. :06. 
One specimen, Georgia, with Formica pensylvanica. More narrow than 8. 
clavipes, piceous, very shining. Head elliptical, smooth, glabrous; antenne a 
little longer than the head and thorax, testaceous, joints 3—6 equal rounded ; 7th 
one third larger, globular; 8—10 one half wider than the 7th, rounded, slightly 
transverse, 11th not transverse, obtuse. Thorax covered with erect hair; one 
half longer than wide, sides posteriorly straight, anteriorly much rounded ; base 
strongly impressed and subfoveate. Elytra twice as long as wide, nearly twice 
as. wide as the thorax, regularly narrowed each way from the middle, smooth, 
not foveate at the base, with a few fine long hairs, especially towards the margin. 
Feet yellow testaceous, thighs strongly clavate. . 
B--b. 
21. S.salinator, nigro-piceus, thorace piloso, longiusculo, lateribus antice 
rotundatis, basi 4-foveato, elytris cum thorace angulum formantibus, glabris, 
antennis articulis elongatis, tribus ultimis maioribus. Long. :06. 
Cambridge, Mass., in salt marshes. Very similar in form to S. clavipes, but 
at once known by the antennz having only three enlarged joints. Entirely black- 
ish piceous; head oval, smooth, glabrous; antenne half as long as the bedy, 
slender, joints 3—7 equal, a little longer than wide, 8th one half longer and a 
little thicker, somewhat conical; 9th and 10th equal, a little longer, and nearly 
twice as thick as the Sth, 11th subacute. Thorax covered with erect black hair, 
a little wider than the head, longer than wide, narrowed in front, convex, slightly 
rounded on the sides anteriorly ; base with four punctures. Elytra one half wider 
than the thorax, and forming a very obtuse angle with it; entirely glabrous, 
slightly foveate at base. Thighs moderately clavate. 
