Juneigoo.] CaSEY : On NORTH AMERICAN CoLEOPTERA. 57 



Baeocera Erichs. 



The known species of this genus have materially increased in num- 

 ber of late, and those in my cabinet may be arranged as follows : — 



Scutellum not visible behind the basal lobe of the pronotum when the latter is 

 normally adjusted to the base of the hind body 2 



Scutellum visible though always very minute and transverse 9 



2 — Basal marginal stria of the elytra entire 3 



Basal stria either much abbreviated externally or interrupted about the middle of 

 each elytron 7 



3 — Larger species, 1*4. mm. in length or more 4 



Very small species, scarcely exceeding I mm. in length 6 



4 — Third antennal joint distinctly shorter than the fourth ; punctures along the di- 

 lated posterior margin of the intermediate acetabula small or moderate in size. ..5 



Third antennal joint fully as long as the fourth ; marginal punctures very coarse ; 

 color black throughout, the elytra feebly rufescent at the apical margin and the 

 abdomen paler toward tip ; legs dark rufous ; upper surface not distinctly punc- 

 tate at any part. Length 1.6 mm.; width 0.9 mm. Iowa (Keokuk). 



speculifer Csy. 



5 — Body broadly oblong-oval, the third antennal joint as long as the second, black, 

 the elytra picescent posteriorly, very obsoletely punctulate ; legs dark rufous. 

 Length 2.0-2.6 mm.; width I.3-I.75 mm. Pennsylvania, District of Columbia, 

 Illinois, and Iowa COncolor Fabr. 



Body narrowly oval, black throughout, the elytra rather abruptly rufous in apical 

 sixth or seventh ; legs dark rufous ; elytra sparsely and very obsoletely punc- 

 tulate ; third antennal joint much shorter than the second. Length 1. 9-2. 2 

 mm.; width 1.2— 1. 25 mm. New York (Long Island), North Carolina ( Ashe- 

 ville), and Indiana congener Csy. 



6 — More narrowly oblong-oval, black, the elytra more distinctly rufescent at apex ; 

 antennae shorter, not as long as the width of the body. Length 1.1 5-1. 25 mm.; 

 width 0.7-0.75 mm. Rhode Island (Boston Neck), and Michigan 



apicalis Lee. 



Broadly and evenly elliptical, the median line of the body very much more arcuate in 

 profile, deep black, the elytral apices scarcely paler ; antennas relatively dis- 

 tinctly longer, as long as the width of the body. Length I.I-I.15 mm.; width 

 0.7-0.72 mm. Texas (Columbus) robustula Csy. 



7 — Marginal line of the prothorax evenly and moderately arcuate when viewed later- 

 ally; mesepimera narrower ; species very small in size 8 



Marginal line, when viewed laterally, nearly straight, becoming rather abruptly and 

 strongly bent downward through basal third ; mesepimera broader and not ex- 

 tending quite so far toward the coxre ; metepisternal suture coarse, straight as 

 usual ; size large, the body black, the elytra feebly rufescent at tip, not distinctly 

 punctulate; antennae long and slender. Length 2.3-2.5111111.; width 1. 3-1.35 



mm. Rhode Island(Boston Neck), Virginia and Arkansas deflexa Csy. 



8 — Body moderately convex longitudinally, the metasternum more elongate, the epis- 

 ternal suture not very coarse ; color pale flavescent throughout, the pronotum gen- 



