602 Goleopterological Notices, V. 



but little wider than long, the sides convergent and nearly straight to apical 

 fourth, then constricted, the apex broadly subtubulate and a little more than 

 one-half as wide as the base, the latter feebly oblique and nearly straight 

 from the obsolete median lobe to the sides ; disk coarsely deeply and densely 

 punctate, the punctures tending to form longitudinal rugae, with an entire 

 and feebly impressed median line, and a large impunctate spot at each side 

 near lateral fourth and behind the middle. Scutellum small, tumid, deeply 

 seated. Elytra large, widest near basal third where they are three-fourths 

 wider than the prothorux, fully twice as long as the latter and longer than 

 wide ; sides just visibly convergent from posterior third to the conspicuous 

 humeral callus, convergent and feebly arcuate behind, the apex rather nar- 

 rowly rounded ; disk with moderately fine, very shallow, opaque striae ; inter- 

 vals flat, three to four times as wide as the striae, opaque, finely and feebly, 

 somewhat sparsely and confusedly punctate throughout their entire extent. 

 Under surface dull, the abdomen much more shining and minutely, sparsely 

 punctate. Length 3. .5 mm. ; width 1.8 mm. 



Missouri. 



A single specimen. 



AMERCEDES n.gen. 



Body oval, stout, convex, semi-glabrous. Head and eyes nor- 

 mal. Beak consisting of two dissimilar elements, the basal fourth 

 abruptly swollen and bulbiform, coarsely sculptured, the remainder 

 almost perfectly straight, forming a very slight angle with the basal 

 part, very slender, cylindrical, polished and almost impunctate. 

 Mandibles short, stout, obliquely vertical in action nearly as in 

 Eunyssobia, minutely tridentate. Antennae inserted at the sides 

 near the base at the anterior limit of the bulbous portion, the scape 

 very short, claviform, attaining the eye ; funicle long, very slender, 

 nearly nude, the basal joint long, rather longer than the scape, 

 slightly claviform, second extremely long, slender, almost twice as 

 long as the first and as long as the entire remainder, three to seven 

 subequal in length, gradually a little thicker, the seventh finely 

 pubescent ; club moderate, normal, oval, not very abrupt, finely 

 pubescent, with the basal joint constituting about one-half of the 

 mass. Prosternum with a broad and profound median sulcus, the 

 anterior coxae separated by distinctly less than their own width. 

 Legs rather thick; femora unarmed ; tibiae finely fluted, bent out- 

 ward and slightly thickened toward apex ; tarsi well developed, the 

 two basal joints small, wider than long, the third large, the lobes 

 long and widely divergent, claw-joint very long, sliender, feebly 



