144 A. MATTHEWS. 



Dift'ers from P. rugulomm in its exceedingly minute size, fainter sculp- 

 ture, shining surface, and bright yellow legs. 



Hah. — Texas, near Columbus. 



Ohs. — Two fine and perfect specimens of this species, the most minute 

 of the whole family, except Nanonella funffi. were collected by E. A. 



Schwarz. 



P. tropicnm Matthews n. sp.— L. e. .50 — .fi.3 mm.— Rather long, moderately 

 convex and shining, rufo-testaceous, clothed with very short Havescent hair; head 

 large, rounded in front; eyes large and rather prominent ; thorax small, not wider 

 or longer than the head, widest before the middle, rather coarsely and closely tu- 

 berculate, sometimes with a faint depression on the disc; sides much rounded in 

 front and strongly contracted towards the base, slightly margined, basal margin 

 nearly straight with the angles moderate; elytra much longer and slightly wider 

 than the head and thorax, widest near the apex, very finely and closely asperate ; 

 sides faintly rounded, apex very broad, slightly rounded ; abdomen with the 

 pygidium only exposed; legs and antennae short, robust, bright yellow. 



DiiFers from P. planum in its smaller size, shorter form, short and very 

 robust antennte, and in sculpture. 



Hah. — Central America, found in some numbers near Bugaba, Panama, 

 by Mr. Champion. 



P. plaiiiim Matthews n. sp. — L. c. .63 mm. - Elongate, almost linear, moder- 

 ately convex, ferruginous, densely clothed with yellow pubescence; head large, 

 produced in front; eyes large and very prominent; thorax small, transverse, nar- 

 rower and not longer than the head, widest before the middle, much contracted 

 towards the base, closely and finely tuberculate, hinder angles almost right angles: 

 elytra long and narrow, scarcely wider but more than half as long again as the 

 head and thorax, closely but finely asperate, apex broad and rounded ; legs yellow, 

 long and slender; antennse rather short, bright yellow. 



Differs from other species in its long and almost linear form. /*. 

 jilaintm is allied to to the European P. fovfolafnni, from wliicli it may 

 be known by the smooth unsculptured disc of the thorax. 



Guatemala (Champion). 



P. obscuruin Matthews Cist. Ent. 2. p. 171,1877. — L. c. .75 mm.— Oval, con- 

 vex, piceous, rather thickly clothed with hair; head large, obtuse; eyes moderate, 

 not prominent; thorax moderate, longer and wider than the head, widest at the 

 base, ornamented with large tubercles in transverse sinuated rows; interstices very 

 shining; sides slightly rounded, posterior angles obtuse ; elytra rather short, not 

 longer, and scarcely wider than the head and thorax, widest at the apex, deeply 

 asperate in transverse rows, apex very much rounded and broadly pale ; leg.s and 

 antenute moderate yellow. 



Differs from the two preceding species in its shorter and broader form, 

 larger head and thorax, piceous color and sculpture. 



British Columbia (Crotch). 



P. huinile Matthews Cist. Ent. 2, p. 170, 1S77.— L. c. .nr,— .75 nun.— Elon- 

 a;ate, moderatelv convex, ferruginous, rather thic'klv I'lothetl with vylldW hair: 



