14H A. MATTHEWS. 



Pronotum large, dilated in front i^Iannerheiinii. 



Pronotum small, with the base of the thorax and shoulders of the elytra 



strangulated strangulatuiii. 



Color of body rufo-piceous, or rufo-eastaneous. 



Body turgidly convex obesuiii. 



Body moderately convex. 



Whole surface impunctate impuiiclatliiu. 



Head, thorax and scutellum foveolate foveatuni. 



Pronotum alone foveolate igiiobile. 



Color of body pale castaneous foveicolle. 



Pronotum without four distinct foveas at the base evaiiescens. 



Species added to the foregoing by more recent discoveries : 

 Pt. ilitens, distinguished by its shining impunctate surface and absence of the 



basal fovece of the thorax, and from P. impunclatum. by its larger size and broad 



base of the thorax. 

 Pt. speculiler, distinguished from Pt. obesum, by its larger size, longer an- 



tennffi, ond peculiar arrangement of the thoracic fovea. 

 Pt. Ulkei, distinguished from all by the deep foveolate punctuation of the 



whole body. 



P. straiigtilatum Matthews n. sp. -L. c. .75— .87 mm. — Elongate, strangu- 

 lated at the shoulders, very convex, smooth and shining black ; head large, pro- 

 duced in front; eyes large and prominent ; thorax small, transverse, rather wider 

 but not longer than the head, widest before the middle, very strongly contracted 

 at the base, smooth and shining, with four small, very indistinct fovea near the 

 base, and two others near each basal angle; sides broadly margined and much 

 rounded, basal angles obtuse; elytra ovate, very convex, much wider, and almost 

 twice as long as the head and thorax, widest before the middle, strongly attenuated 

 at the apex and the shoulders, very shining black with the shoulders and apex 

 rufous, with a row of punctures on each side of the anterior half of the suture 

 terminating in a short convergent line : legs slender, bright yellow : antenna yel- 

 low, with the club dusky. 



Differs from all other species in its strangulated form. 



Guatemala ( Champion). 



P. foveicolle LeConte Smith. Misc. Coll. p. fi?>. — L. c. .75 mm. — Ovate, short, 

 broad, very convex and shining, bright castaneous, sparingly covered with silvery 

 hairs; head large and broad, rounded in front; eyes moderate, not prominent; 

 thorax moderate, wider but scarcely longer than the head, widest before the mid- 

 dle, with two small fovese near the anterior margin, and four very large, deep, 

 circular, equidistant fovea near the base, and a deep longitudinal impression on 

 each side near the margin; sides widely margined, rounded anteriorly and con- 

 tracted towards the base, with a single erect curved seta on each side behind the 

 middle, hinder angles almost right angles ; elytra broad, short, ovate, rather longer 

 and wider than the head and thorax, widest before the middle, finely and very 

 remotely punctured ; sides much rounded and broadly margined, apex obtuse ; 

 legs and antenna long, bright yellow, with the club of the latter dusky. 



Difters from other species in its small size, short, convex form, casta- 

 neous color, the peculiar sculpture and shape of the thorax. 

 United States. 



