50 TIIOS. L. CASEY. 



the shape of the nientum, that o^ Janus heing broader than long; in 

 the punctuation of the head, that of pernigrum being much more 

 dense ; also in the length of the eye. The antennae and sculpture 

 are almost exactly the same in both. The three specimens of the 

 present species before me do not perceptibly vary. 



P. parvuluill n.sp. — Form rather elongated, elliptical, twice as long 

 as wide ; upper surface polished, dark piceous, niider surface slightly paler. 

 Head small ; iuterocular surface strougly declivous, rather feebly tuberculate 

 near each eye ; epistoma nearly plane, scarcely declivous, with a very broad, 

 feeble, transverse furrow separating it from the declivous portion, very 

 broadly and feebly swollen in the middle ; anterior margin very broadly 

 rounded, nearly transverse in the middle ; labrum very broadly rounded, 

 short, punctures between the eyes small, round, feebly impressed, evenly 

 distributed, and separated by nearly twice their own widths ; those of epis- 

 toma much more distant ; surfaces minutely granulate, shining ; antennae 

 robust, short, scarcely as long as the width of pronotum, piceous-brown 

 throughout, second joint two-thirds as long as the third, third and fourth 

 equal in length, penultimate joints very strongly transverse. Prothorax at 

 base slightly more than twice as wide as long ; base one-half wider than the 

 apex; side feebly and very evenly arcuate; anterior and posterior angles 

 rounded ; anterior margin broadly and evenly emargiuate, posterior feebly 

 bisiuuate, strongly arcuate in the middle ; disk with two feeble impressions 

 at the base, moderately convex, minutely, rather evenly and distantly punc- 

 tate, also minutely reticulated, polished. Scutellum slightly longer than 

 wide. Elytra at base slightly wider than the contiguous pronotum; sides 

 parallel and rather strongly arcuate for two-thirds the length from the 

 humeri ; disk evenly convex, slightly more than three times as long as the 

 pronotum, rather acutely rounded behind, feebly striate ; striae impressed 

 and very strongly punctate, distance between punctures in striae, slightly 

 more than one-third the distance between the latter ; intervals very feebly 

 convex, very minutely, evenly, rather distantly and distinctly punctulate, 

 also minutely reticulated, polished. Under surface of the abdomen sparsely 

 and rather feebly punctate, more finely and distantly so on the last segment. 

 Fourth joint of posterior tarsi equal in lengtli to the second and third together, 

 much shorter than the first. Length 3.1 mm. 



"Wilk'ts Point, Long Island ; one specimen, % . 



This tine little species resembles somewhat a very minute exca- 

 vation, in which the frontal horns are rudimentary. It is seen, how- 

 ever, to be very distinct by the short antennae, having very strongly 

 transverse outer joints, and by the punctuation of the pronotum. In 

 e.rcavatum the penultimate joints are very feebly transverse, and the 

 second joint is relatively very much shorter ; the punctuation of the 

 pronotum is much coarser, and the basal impressions are not as strong; 

 the color, also, is deep black. The prosternal episterna are much 

 more feebly and sparsely punctured in parcnlam. 



