158 Trans. Acad. Sci. of St. Louis. 
moderately convex, the head moderately developed, wider than long but 
distinctly narrower than the elytra, parallel and straight at the sides, 
the angles right and only slightly rounded; eyes still rather smaller, 
somewhat convex, at twice their own length from the base; prothorax 
less developed, wider than long, a little narrower than the head, feebly 
obtrapezoidal, with all the angles broadly rounded; elytra quadrate, a 
fourth wider and two-fifths longer than the prothorax. Length 2.75 
mm.; width 0.65mm. Mississippi (Vicksburg)....... congruens D. sp. 
Both carolinensis and congruens are described from the 
male, in which sex the hind margin of the fifth ventral is 
transverse, becoming just visibly bisinuate at the middle, and 
the sixth has at the apex a broad notch, in the form of an 
incised cusp, with its sides rapidly flaring outward and arcu- 
ate, the point of the notch narrowly obtuse. In congruens 
the sides of the notch flare still more widely and the incisure 
is therefore relatively shallower than in carolinensis. The 
punctures of the head are rather irregular in form and deep, 
the narrow interspaces having some very minute scattered 
punctules which appear to bear the visible pubescence. The 
punctures of the pronotum, and, to some extent, of the elytra, 
are also peculiar, smaller than those of the head and equally 
close-set but circular, slightly elevated and bearing each a 
centrally placed hair. Although so generally distributed over 
the American continents, Sciocharis has not yet occurred in 
the regions bordering the Pacific Ocean. 
Sciocharella n. gen. 
The remarkable antennae characterizing this and the pre- 
ceding genus are unlike anything else in the tribe and thor- 
oughly isolate them. The present genus greatly resembles 
Sciocharis, though composed of much more minute species, 
but differs very radically in the form of the gular sutures and 
smaller eyes, as well as in its undilated anterior tarsi. The 
only species known to me at present is the following :— 
Parallel, slender, moderately convex, alutaceous, pale flavo-testaceous 
throughout, except the head, which is piceous; punctures of the head and 
pronotum not distinct, very minute, of the elytra extremely minute, 
rather sparse; head nearly as long as wide, a little wider at base than 
across the slightly convex eyes, which are situated at rather more than 
