180 Trans. Acad. Sci. of St. Louis. 
The male secondary characters in Jaticolle are of a simple 
nature, the fifth ventral being unmodified, or only just visibly 
and broadly sinuate, and the sixth having a simple rounded 
sinus of moderate depth and about a third as wide as the 
apex. In nevadicum the outer labral teeth are relatively 
smaller and at a greater distance from the inner than in 
laticolle. 
Medonella n, gen. 
The single minute species, for which this generic name is 
proposed, is remarkable in having a type of antenna some- 
what recalling Sctocharis, those organs being short, with the 
basal joint rather stout and of the usual length, the second 
short and less stout and the third and following still smaller 
and more slender; but the outer joints increase rather rapidly 
in size, the eleventh being about as stout as the first and the 
setae, though bristling, are very much shorter. It is also 
peculiar in that the rather widely separated gular sutures are 
completely effaced. The type of Medonella may be described 
as follows: — 
Parallel, moderately convex and slender, polished throughout and pale 
rufo-testaceous, the abdomen slightly darker or picescent; punctures 
of the head fine, simple and sparse, of the pronotum still finer and 
sparser, of the elytra rather coarse, asperate and not close-set and of 
the abdomen unusually coarsely and sparsely asperate; head well 
developed, wider than long, parallel and straight at the sides, the 
angles right and but narrowly rounded, the base transversely truncate, 
becoming sinuate in the middle; antennae scarcely a third longer than 
the head in the female; eyes rather small but unusually convex; pro- 
thorax feebly obtrapezoidal, slightly wider than long, just visibly 
narrower than the head, the sides nearly straight and the angles rather 
obtuse, the anterior scarcely at all rounded; elytra small, about equal to 
the prothorax in length and width, the sides obviously diverging from 
the scarcely rounded basal angles and almost straight; abdomen at the 
middle rather wider than the elytra and fully as wide as the head, of 
the usual length, the sides parallel and very feebly arcuate; legs rather 
short. Length 1.8 mm.; width 0.8 mm. Florida (Biscayne Bay). 
minuta n. sp. 
The two specimens before me are females, the male being 
unknown as yet. The labral teeth are very difficult to 
observe, but the outer seem to be not only smaller than the 
