150 A. MATTHEWS. 



thorax, widest before the middle, very smooth and shining, with a single stria of 

 remote punctures on each side of the suture, apex slightly attenuated ; legs and 

 antennae rather long, robust, bright yellow. 



Differs from other species in its foveolate head, thorax and scutellum, 

 and almost impunctate elytra. 



Guatemala (Champion). 



P. pillluiu (Maklin) Mannerheim Bull. Mosc. 25, p. 283, 1S45. — L. c. 1 mm. 

 — Ovate, convex, very shining, black very sparingly clothed with silvery hairs j 

 head moderate, much rounded in front; eyes moderate, not prominent; thorax 

 large, longer and wider than the head, widest behind the middle, remotely marked 

 with large shallow punctures on the disk, and four small foveiB near the base; 

 sides margined and much rounded, hinder angles rounded ; elytra ovate, half as 

 long again as the head and thorax, but scarcely wider, widest before the middle, 

 much attenuated posteriorly, rather deeply and thickly punctured, apex paler and 

 slightly rounded ; legs and antennpe long, pitchy black. 



Differs from other species in its large thorax, attenuated elytra, pitchy 

 black legs and antenn?e, and general sculpture. 



California (Maklin). 



P. evanescens, Sil. evane.scens. Marsh. Col. Brit. p. 120, 1802. P. apica/e 

 Erich. 1846, ierminale, Haldeman, 1852. — L. c. ] — IJ mm. — Ovate, rather broad, 

 very convex and shining, black, or piceous, with the apex of the elytra broadly 

 rufo-testaceous, sparingly clothed with long silver hairs; head moderate; eyes 

 rather large and prominent; thorax short, widest behind the middle, rather deeply 

 but remotely punctured, with a deep transverse impression on each side at the 

 base near the hinder angles; sides rounded, posterior angles obtuse; elytra ovate, 

 widest before the middle, rather deeply but remotely punctate-striate ; apex obtuse, 

 more or less widely rufo-testaceous; legs and antennae rather long, bright yellow, 

 club of the latter dusky. 



This widely diffused species may be more easily recognized by the 

 widely pale apex of the elytra, the absence of distinct foveae at the base 

 of the thorax, and by the transverse impressions near its posterior angles. 

 The differences between this species and its nearest allies, P. Wanhciczii 

 and P. afoniaroides, are described in the " Trichopterygia Illustrata," 

 but need not be repeated here, since neither of the two last-named species 

 have as yet been found in America. 



P. iiiipunctatuin Matthews n. sp.— L. c. .75— .87 mm.— Elongate, oblong, ^ 

 very convex and very sliining, piceous ; head large and broad ; eyes large ; thorax 

 rather large, transverse, wider but not longer than the head, very convex, impunc- 

 tate, smooth and very shining : sides rounded, posterior angles obtuse ; elytra ovate, 

 obtuse; scarcly longer, and rather narrower than the head and thorax, almost im- 

 punctate, convex and very shining; sides margined, widest at the middle, apex 

 obtuse, widely rufescent; legs and antennre moderate, bright yellow. 



Differs from other species in its broad head and thorax, narrow elytra, im- 

 punctate surface, and absence of the usual foveae at the base of the thorax. 



Guatemala, not uncommon (Champion). 



