644 Coleopterological Notices, IV. 



feebly arcuate ; subapical constriction small, distinct ; apex nearly 

 three-fourths as wide as the base, the disk finely, sparsely punctate 

 and slightly alutaceous. Scutellum small, glabrous, quadrate. 

 Elytra very slightly wider than the prothorax and nearly three 

 times as long, parallel, obtusely rounded behind in apical fourth ; 

 humeral callus small but rather prominent; striae very fine but 

 deep ; intervals wide, uniseriately, minutely and remotely punctate. 

 Prosternum broadly but strongly impressed along the middle in the 

 female ; in the male it has a deep rounded pit near the middle, and, 

 before each coxa, a slender process which is much more developed 

 than in any other of our apygidiate Barini, projecting very nearly 

 as far beyond the apical margin of the prosternum as the distance 

 between the latter and the coxae, the apices diverging horizontally 

 toward apex in order not to interfere with lateral movements of the 

 beak ; coxae separated by nearly one-third of their own width. 

 Length 2.3-3.4 mm.; width 0.75-1.1 mm. 



Illinois and Michigan. I also associate with this species a num- 

 ber of specimens taken by Mr. Wickham at Greeley, Colorado, 

 which seem to be merely a little smaller in size; in the single male, 

 however, the prosternal spines are very much shorter, only project- 

 ing as far as the anterior margin. I do not notice the bronzy lustre 

 mentioned by LeConte. 



22 Liimnobaris nitidissima n. sp. — Very elongate, parallel, convex, 

 highly polished, black with a rather strong aeneous lustre ; legs pale, bright 

 rufo-testaceous ; integuments subglabrous, the minute setae very sparse above, 

 slightly longer and more evident toward the sides of the pronotum, only dis- 

 tinct beneath on the met-episterna, where they are broader, somewhat dense 

 and squamiform. Head very minutely, sparsely punctate, the impression 

 almost obsolete, broadly subfoveate in the middle ; beak very slender, straight 

 in basal half, gradually feebly arcuate and rufescent thence to the apex, 

 smooth, cylindrical, punctate at the sides toward base and fully as long as the 

 head and prothorax ; mandibles small, strongly arcuate, thick, deeply notched 

 and unevenly bidentate at apex, and with two or three strong denticles ex- 

 ternally toward base ; antennae inserted at basal two-fifths, slender, the scape 

 just attaining the eye, basal joint of the funicle not quite as long as the next 

 three, second one-half longer than the third, club moderate. Prothorax about 

 as long as wide ; sides straight and parallel fully to apical third, then broadly 

 rounded, convergent and sinuate to the apex, which is two-thirds as wide as 

 the base, the latter transverse, the median lobe extremely feeble ; disk with 

 a feebly defined, incomplete median line, the punctures minute and very 

 sparse. Scutellum small, quadrate, glabrous. Elytra quite distinctly wider 

 than the prothorax and two and three-fourths times as long, parallel, the 



