152 [SEPTEMBER, 
in front, sides straight, base slightly rounded, not impressed. Elytra at the middle 
about one-fourth wider than the thorax, impunctured, rufous, not very densely 
covered with long hairs, humerus elevated, suture anteriorly depressed, base 
with avery small fovea inside of the humeral impression.* Beneath piceous, anus 
testaceous. Feet entirely rufous, thighs very clavate. 
8. 8. flavitarsis, latius fusiformis, pilosus, piceus, thorace antrorsum an- 
gustato, basi non impresso, elytris basi vix impressis, femoribus valde clavatis, 
tibiarum apice tarsisque flavis. Long. 08. 
One specimen, New York. Wider than the preceding, which it very much 
resembles ; the antenne are dark rufous, they are formed as in S. Schaumii, but 
the 7th joint is not perceptibly larger than the 6th. The elytra at the middle 
are fully one-third wider than the thorax; the humerus is elevated awd the base 
is depressed from the’ humerus to the suture, but not foveate. The feet are pice- 
ous, the thighs are very clavate, the extreme tip of the tibiw, and the whole of 
the tarsi are pale yellow. ‘The last joint of the maxillary palpi is much larger 
than in S. Schaumii. 
9. S. fossiger, latius fusiformis, pilosus, piceus, thorace antrorsum valde 
angustato, basi non impresso, coleopteris basi 4-foveatis, femoribus valde clavatis, 
tarsis flavis. Long. -08. 
One specimen, Cambridge, Mass. Very similar to 8. flavitarsis: the thorax is 
much more narrowed in front, so that the apex is scarcely half as wide as the 
base: the elytra at the middle are one-third wider than the thorax, the humeri 
are elevated and the suture depressed, there are two basal fovex, of which the 
inner is the smaller. ‘The antenne are precisely as in S. flavitarsis; the palni 
are yellowish, with the last joint distinct. 
10. S.capillosulus, latius fusiformis, pilosus, rufo-piceus, thorace antror- 
sum angustato, basi subtiliter transversim impresso, coleopteris basi subfoveolatis, 
pedibus rufis, femoribus valde clavatis. Long. :08. 
Georgia, Pennsylvania and New York. Sometimes in the nest of a small fus- 
cous ant with rufous legs. ‘This species is very similar to S. Schaumii, but, is 
wider, and is known at once by the impressed line at the base of the thorax. 
The antenne and palpi are precisely as in S. Schaumii: the humeri are more 
elevated, the suture is a little elevated at base, and marked with a fine impressed 
line, which curves around the base reaching the humeral fovea, the elytra at the 
middle are fully one-third wider than the thorax. 
11. S. basalis, fusiformis, pilosus, rufus, thorace antrorsum angustato, basi 
subtiliter transversim impresso, coleopteris basi foveolatis, antennarum articulis 
intermediis rotundatis, femoribus valde clavatis.. Long. -06. 
Georgia and Louisiana. Very similar to the preceding, but smaller. The 
antenne are as long as the head and thorax, the joints 3—7 are rounded, not 
longer than wide: the three next are larger and also rounded; the last longer, 
oval and subacute: on the elytra, the suture is a little elevated anteriorly and 
marked with a slight stria; the base is slightly bifoveate, and the humeri are 
elevated. « 
12. S.hirtellus, latius fusiformis, breviter pilosus, rufus, thorace antror- 
sum angustato, basi non striato, elytris obsolete punctulatis, basi vix foveatis, 
antennis breviusculis articulis intermediis rotundatis, femoribus valde clavatis. 
Long. :05. 
Georgia. This species is smaller than S. basalis, and the antenne are shorter 
and less slender.. The unimpressed thorax, shorter pubescence, and scarcely 
foveate elytra will readily distinguish it from the other species in which the 
thorax and elytra form a regular outline, without any re-entering angle. One 
specimen has the 8th joint of the antenne intermediate in size between the 7th 
and 9th, so that the club appears only three-jointed. I am unable to perceive 
any other difference, and in the absence of other specimens, leave it under the 
present species. 
