598 Coleopterological Notices, VII. 



more than the strial interspace. Legs well developed, the hind tibiis feebly 

 arcuate. Length 1.35-1.55 mm.; width 0.65-i).7 mm. 



Rhode Island (Boston Neck). 



The male has the first ventral feebly flattened in the middle 

 toward apex and the last large, broadly concave in about apical 

 half or more, and broadly truncate at tip, the tergum gradually 

 quite strongly though sparsely punctulate toward tip, with the 

 last segment very broadly sinuato-truncate ; the cedeagus has a. 

 long and remarkably slender, feebly arcuate and finely pointed 

 process at each side. The completely fused meso-parapleurse are 

 separated from the metasternum by a broadly impressed, evenly 

 arcuate suture, attaining the elytra at about apical third. The fe- 

 male seems to be a little smaller, with shorter elytra and antennae,, 

 but with no difference in the eyes and but little in the abdominal 

 carinas. 



This- fine species, among the largest of the genus, was taken in 

 considerable numbers ; it is not comparable with any other de- 

 scribed thus far. 



R. sodalis. — Rather strongly convex and ventricose, polished and subim- 

 punctate throughout, the elytra minutely and very feebly rugulose and the 

 pronotum just visibly punctulate toward the sides anteriorly, rather pale rufo- 

 testaceous throughout, the elytra somewhat clearer and the abdomen obscure;, 

 pubescence pale, short, moderately dense, stiff, even and recurved. Head 

 slightly, though distinctly, narrower than the prothorax, the foveas normal; 

 eyes large and prominent, at about ^ their own length from the base. Antennie 

 slender, }4 ^^s long as the body, the club very gradual in formation and rather 

 slender; second joint distinctly shorter and narrower than the first, cylindric,. 

 nearly 3^ longer than wide; three to eight equal in width and still much nar- 

 rower; third fully f^, fourth and sixth %, fifth more than 1, seventh 3^, longer 

 than wide; eighth as long as wide; ninth and tenth ob trapezoidal, increasing^ 

 in size, slightly wider than long; eleventh still thicker, obliquely pointed, a& 

 long as the three preceding. Prothorax only moderately transverse, a little 

 more than }^ wider than long, not very strongly rounded at the sides, the lat- 

 ter converjent and sinuate near the base; apex fully % as wide as the base; 

 disk strongly convex, the median fovea rather small but deep and perforate. 

 Elytra slightly shorter than wide, twice as wide as the prothorax and ^ 

 longer; sides distinctly divergent and broadly arcuate; humeral swelling pro- 

 nounced; striae and basal fovese normal. Abdomen not quite as wide as apical 

 third of the elytra, the basal segment }4 as long as the suture, the carinse fine, 

 short, strongly divergent and separated at base by but little more than the 

 strial interspace. Legs normal, the hind tibise feebly arcuate. Length 1.4 

 mm. ; width 0.63 mm. 



Arkansas (Little Rock). 



