194 GEO. H. HORN, M. D. 



P. qiiadricollis n. sp. — Elongate, parallel, black, shining ; antennae pioeous, 

 as long as the head and thorax, the joints all a little longer than wide; head or- 

 bicular, sparsely punctured behind the eyes ; thorax very little wider than the 

 head, nearly square, a little longer than wide, not narrowed in front ; sides very 

 slightly arcuate and feebly sinuate when viewed laterally, dorsal punctures mod- 

 erate, equidistant; elytra a little wider than the thorax, conjointly nearly square, 

 finely not densely punctate; surface slightly bronzed, sparsely pubescent; abdo- 

 men above finely punctate, the basal segments very sparsely the apical three more 

 densely; beneath more coarsely but sparsely punctate. Length .20 — .28 inch ; 5 

 — 7 mm. 



Jlfo/e.— Anterior tarsi very broadly dilated, patellate : last ventral segment 

 broadly triangular emarginate with a moderately deep longitudinal impression 

 extending tiie entire length of the segment: penultimate segment sinuate at 

 middle. 



Female. — Anterior tarsi narrowly dilated ; last ventral entire. 

 In its form and general appearance this species very closely resembles 

 grandicoUis, and without the male cannot be accurately distinguished. 

 In its sexual characters it resembles Thevenefi, but the latter has a broader 

 thorax and more coarsely and evenly punctured abdomen. 



This species superficially resembles quisqinUarms Gryll, of Europe, and 

 has been so named by several authorities. On examining the European 

 species I find the last segment of the male simply emarginate without 

 the longitudinal impression, the posterior margin of the penultimate seg- 

 ment is straight in qw'sguiliarins, and sinuate in quadrlcolUs. 

 Occurs from New York to Missouri and Michigan. 



P. Thevoneti n. sp. — Form moderately elongate, black, shining; elytra 

 slightly aeneous; legs piceous or black; antennae piceous, as long nearly as the 

 head and thorax, joints 5-10 nearly square; head sub-quadrate, hind angles 

 slightly punctured; thorax nearly square, not narrowed in front; sides scarcely 

 sinuate, disc convex, dorsal punctures large, deep and equidistant: elytra not 

 wider than the thorax, conjointly a little wider than long, coarsely not densely 

 punctured, sparsely pubescent; abdomen sparsely punctured, the punctures rather 

 finer than those of the elytra; beneath with finer punctures more sparsely placed. 

 Length .20— .26 inch ; 5—6.5 mm. 



Male. — Anterior tarsi very broadly dilated, patellate; last ventral segment 

 broadly and feebly emarginate and with a slight longitudinal impression extend- 

 ing the length of the segment; penultimate segment sinuate at middle. 



Female. — Anterior tarsi narrowly dilated ; last ventral entire. 

 This species bears a manuscript name, under which it is here known, 

 from the hand of Fauvel. It greatly veiieiah\e& pnhernlus and grandi- 

 colb's, and can only be distinguished with certainty by the male sexual 

 characters. 



Occurs in California and Nevada. 



P. debilis Grav. — Brownish, piceous to nearly black; legs pale brown, the 

 tibire and tarsi darker; antennae piceous, two basal joints paler, a little shorter 



