June:9oo.] 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 ^ 



Scutellum visible though always very minute and transverse 9 



2— Basal marginal stria of the elytra entire ",'ji""^f 



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



each elytron 



3— Larger species, i>< mm. in length or more ^ 



Very small species, scarcely exceeding i mm. in length 



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 Lsy. 



.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 1. 3-1.75 m™. Pennsylvania, District of Columbia, 



.. , T concolor Art^r. 



Illinois, and Iowa . 



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- 



, , ^. congener Csy. 



ville ) , and Indiana 



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

 antenns; shorter, not as long as the width of the body. Lengthl. 15-I.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 ; antenna, relatively dis- 

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



07-0.72 mm. Texas (Columbus) robustu a C.j. 



7_Marginal line of the prothorax evenly and moderately arcuate when viewed later^ 



ally; mesepimera narrower ; species very small in size • ■ 



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 cox.^ ; metepisternal suture coarse, sti-aight as 

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

 punctulate ; antenna long and slender. Length 2.3-2.5 mm. ; width i . 3-1-35 



mm Rhode Island(Boston Neck), Virginia and Arkansas detlexa c^; . 



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

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



