162 NORTH AMERICAN 



PTILIUMT Erichs. 



P. flin^icola n. sp. — Form elongated, nearly as in Collnni. Color above 

 piceou.s-ljhuk, iieneath very slightly paler ; oral organs, legs and parts of 

 the prosternum pale reddish-flavate ; antennae black, basal joints paler. 

 Pubescence rather abundant, cinereous, short. Head two-thirds wider than 

 long, sub-triangular ; sides distinctly sinuate at the antennae ; eyes large, 

 rather prominent ; interocular surface shining, very feebly finely and evenly 

 tuberculate ; antennae slightly longer than the head and prothorax together, 

 slender, third joint narrowest, two-thirds as long as the fourth, joints four 

 to eight cylindrical, nearly equal, ninth slightly thicker, tenth and eleventh 

 much more rol)ust, slightly flattened, eleventh distinctly longer and slightly 

 more robust than the tenth ; basal joints equal, slightly elongated, dark 

 flavo-testaceous. Prothorax widest very slightly behind the middle where 

 it is slightly wider than the head, and three-fourths wider than long; sides 

 evenly and rather strongly arcuate ; apex slightly shorter than the base, both 

 very feebly broadly and equally arcuate, the latter feebly sinuate in the 

 middle ; anterior and posterior angles rounded ; disk distinctly longer than 

 the head, rather strongly convex, evenly and rather coarsely tuberculate, 

 tubercles round, flattened and generally distant by their own widths. Scu- 

 tellum rather large, triangular, roughly asperate. Elytra at base very 

 slightly narrower than the pronotum, widest at the middle where they are 

 slightly wider than the same ; sides evenly and distinctly arcuate ; together 

 somewhat abruptly and obtusely rounded behind ; inner apical angles feebly 

 rounded ; disk two-fifths longer than wide, convex, apex scarcely paler, 

 evenly strongly and coarsely asperate, having almost an imbricated appear- 

 ance, very slightly more than twice as long as the pronotum. Legs some- 

 what slender, translucent: tarsi excessively slender; posterior coxae well 

 separated. Length 0.4;') mm. 



Pennsylvania, near Philadelphia, 27. 



Common in decaying funsri fjrowinjj amonjist fallen leaves in tiie 

 woods. The abdomen in all tlie specimens wliieli I have collected is 

 stronjjly retracted, so that it comes very far from attaining even the 

 tips of the elytra. Tiie species appears to approximate very closely 

 to P. CoUani Miikl., and differs as far as 1 can determine without 

 having seen specimens of that form, in its mucii smaller size, rela- 

 tively longer protliorax, black antennae, and coarser sculpture. On 

 comparing it with the figure of CoUani given by Mr. Matthews, the 

 following difi'erences are observable : — 



Tlie elytra in the figure are nearly three times as long as the pro- 

 notum and tiie apex of each is more bioadly rounded, especially at 

 the inner apical angles; the pronotum appears to be nearly twice as 

 wide as long, and its disk is seen tti \n\ nnu'h more finely antl closely 

 tuberculate. 



I have selected one of the larger specimens for measurement, and 

 many of tliem are scarcely more than 0.38 mm. in length. 



