214 GEO. H. HORN, M. D. 



Male. — Anterior tarsi filiform ; last ventral strongly bidentate at apex, the teeth 



slightly everted, the margin of the segment each side deeply sinuate, the face of 



the segment concave, smooth, shining; anal processes stout and bent downwards. 



Female. — Anterior tarsi filiform; last ventral segment prolonged in a lobe at the 



middle, and on each side sinuate. 



This species has somewhat the facies o^ lyahernlus, but is readily known 

 in either sex by the peculiar sexual characters. I have seen a specimen 

 from Fauvel with eight dorsal punctures, with unmistakable male char- 

 acters. 



Occurs in California, probably in the southern portion. 

 P. parvus n. sp. — Piceous or brownish, legs testaceous; antennpc nearly as 

 long as the head and thorax, piceous, two basal joints pale, joints 6-10 as wide as 

 long; head oval, the sides parallel, hind angles not punctulate; thorax not wider 

 than the head, oblong, longer than wide ; sides nearly parallel, dorsal punctures 

 five, moderately deeply impressed, equidistant; elytra a little wider than the 

 thorax and as long, conjointly a little longer than wide, moderately closely but 

 not coarsely punctate; surface shining, very slightly bronzed, sparsely pubescent; 

 abdomen sparsely punctate, punctures finer than on the elytra; surface slightly 

 iridescent; beneath very sparsely punctate. Length .18 inch; 4.5 mm. 



Male. — Anterior tarsi filiform; last ventral segment not emarginate at middle, 

 but distinctly sinuate on each side, with a rather deep longitudinal sulcus extend- 

 ing the length of the segment. 



Female. — Tarsi slender; last ventral entire. 



This is one of the smallest species of the genus, and resembles vi- 

 gritnlus. The sexual characters of the male, which are unique in our 

 fauna, afford the only reliable means for distinguishing it from the many 

 small piceous species. 

 Occurs in Arizona. 



P. bidentatus n. sp. — Piceous, thorax and elytra reddish brown; legs tes- 

 taceous; antennae nearly as long as the head and thorax, piceous, two basal joints 

 pale, joints 6-10 nearly square ; head oval, slightly narrowed behind the eyes, 

 hind angles punctulate; thorax a little wider than the head, longer than wide, 

 slightly narrowed in front, dorsal punctures five, equidistant; elytra a little wider 

 and longer than the thorax, longer than wide conjointly, punctures coarse, sparsely 

 placed, pubescence sparse; abdomen very sparsely and finely punctured; beneath 

 a little more distinctly punctured than above. Length .22 — .24 inch ; 5.5 — 6 mm. 

 Male. — Anterior tarsi filiform ; last ventral segment with two membranous 

 tooth-like processes, separated by an acutely triangular notch, in front of which 

 the corneous portion of the segment seems triangularly emarginate and on each 

 side sinuate. 



Female. — Unknown. 



The general appearance of this species is that of ventraUs, with, how- 

 ever, a longer thorax. The sexual characters are very remarkable, and 

 afford the only reliable means of separating the present species from the 

 series following it. 



Occurs in California, Vancouver and Washington Territory. 



