148 Trans. Acad. Sci. of St. Louis. 
sinuation at each side of the median tooth broader and feebler; an- 
tennae, gular sutures and palpi similar; ligula densely fimbriate at 
tip with about six stout membranous spicules; neck scarcely more 
than a third as wide as the head; prothorax subquadrate; prosternum 
rather short; elytra large and well developed; abdomen narrower, the 
segments narrowly and feebly impressed at base; legs slender, the an- 
terior tarsi not dilated, the posterior slender and shorter, the first joint 
only slightly longer than the second, equal to the fifth, the first four 
decreasing uniformly inlength. Cosmopolitan. [= Metaxyodonta Csy.]. 
Lithocharis 
The known species of these genera are comparatively few 
in number. 
Aderocharis Shp. 
This genus is rather well represented in Mexico by several 
species, but only one occurs widely distributed within our 
territories as follows : — 
Body broad, parallel, only very moderately convex, dark red-brown in 
color throughout, the head black or blackish; surface throughout 
rendered very dull in lustre by fine, densely placed bnt not con- 
fluent punctures, which are granuliform on the elytra; head not quite 
as"long as wide, parallel, the sides feebly arcuate, the angles rather 
narrowly rounded; eyes at nearly twice their length from the base; 
antennae scarcely as long as the head and prothorax, the latter not 
quite as wide as the head, slightly wider than long, with the sides dis- 
tinctly converging from the very distinct apical, to the broadly rounded 
basal, angles, and straight; median impunctate line yery fine but entire; 
elytra quadrate, parallel, a fourth wider and longer than the prothorax; 
abdomen parallel, nearly as wide as the elytra. Male with the fifth 
ventral just visibly sinuate toward the middle of the apex, the sixth 
broad, angularly emarginate throughout its entire width at apex, the 
emargination some seven times as wide as deep, with the angle only 
slightly rounded; seventh unusually developed, finely, longitudinally 
slit beneath nearly throughout its length; female with the sixth ven- 
tral rather narrowly and strongly rounded at tip. Length 6.5 mm.; 
width 1.3 mm. Pennsylvania, Virginia, North Carolina (Asheville), 
ONG LOWS. vende cveeesseecsewe dediow dia vice ceases s o0dee GOPUIGime GLAT. 
This species is moderately abundant and displays little or 
no variability. \ 
Lithocharis Lac. » 
The species of this genus are but few in number, and, in 
several instances, cosmopolitan in distribution, being probably 
