CoIeoj)terological Notices, VI. 653 



tip, the median being drawn out to a very minute slender 

 point ; tlie slender intromittent duct proper, lying within the widely 

 open under surface of this sheath, is cylindrical and feebly, 

 broadly constricted at apical fourth, failing to attain the tip of 

 the acute median process of the sheath by a fifth or sixth of its 

 own length ; it is gradually and feebly bent downward toward 

 apex. The entire organ as protruded in this specimen is rather 

 more than one-half as long as the abdomen. 



2. M. cilictlis Say — Journ. Acad. Nat. Sei., Phila., 1819, p. 278; Lee: 

 Proc. Ac. Nat. Sci., Phila., 1852, p. 97 (Anthicus). 



This species differs from formicarius in its larger size, longer, 

 more filiform, scarcely incrassate antennae, much larger and more 

 prominent eyes, denser punctures of the pronotum and elytra, the 

 latter being more parallel and scarcely at all dilated behind the 

 middle, and in coloration, cinctus being pale vufo-testaceous in 

 color, with the elytra blackish except toward base, and with an 

 apical pale spot which is always wanting in formicarius ; it also 

 differs in the position of the transverse pale fascia, this being sit- 

 uated more nearl}^ at basal third than fourth. In the present 

 species the omoplates are ver}' prominent, but the transverse im- 

 pression of the elytra behind them is obsolete. Length 3.7 mm.; 

 width 1.2 mm. 



Illinois and Iowa. Apparently not abundant. 



3. IW. properilS n. sp. — Kather slender and convex, highly polished, 

 dark rufo-piceous, the elytra black except at base; antenna; more obsciire to- 

 ward apex. Head orbicular, not longer than wide, convex, minutely, very 

 remotely punctate, semi-circularly rounded behind, very broadly and obso- 

 letely impressed at bcise; eyes rather large and prominent; antennae slender, 

 very feebly incrassate, more than two-lifths as long as the body, the third 

 joint slightly longer than the fourth, tenth much longer than wide. Prothorax 

 distinctly narrower than the head and longer than wide, globularly convex 

 before the constriction, expanded toward the distinct basal margin; disk sub- 

 impunctate except toward the middle posteriorly, where the punctures are 

 coarse and dense. Elytra elongate, twice as long as wide, a little more than 

 twice as wide as the prothorax, feebly dilated beliind the middle, thence grad- 

 uallj' and not very obtusely rounded behind; humeri widely exposed, the 

 mes-episterna visible from above; disk deeply impressed near the scutellum, 

 the omoplates prominent; transverse constriction near the base strong, the 

 portion of the surface thence to the apex moderately convex in profile; punc- 

 tures minute and very widely dispersed throughout, except in the transverse 

 depression, where they become coarse, and where there is a transverse even 



