180 Trans. Acad. Sci. of St. Louis. 



The male secondary characters in laticolle 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 Sciocharis, 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 maybe 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 0.3 mm. Florida (Biscayne Bay). 



niiimta 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 



