AMERICAN COLEOPTERA. 145 



one-half longer than wide, base slightly narrowed, disc with moderately deeply 

 impressed, finely punctured strise, the intervals slightly convex sparsely punctate. 

 Body winged, beneath smooth. Length .36 % — .42 9 inch; 9 — 10.5 mm. 



Male. — Tarsal characters of amcena. Anal segment truncate, on each side 

 a muricately punctured space from which numerous hairs arise. 

 Female. — Tarsi slender. Anal segment with three setae each side. 



This species has very nearly the form of amcena, the thorax however 

 more nearly that of viridis. Its color makes it an odd member of the 

 genus, but parallel instances are found in Callida. 



The sexual characters of the male in the anal segment are also at 

 variance with the other species, but I have been unable to find any valid 

 reason for separating it from Philophuga. 



Two specimens from the high mountains in Kern Co., California. 



PLOCHIONUS Dej. 



Although plainly distinct from Callida, it is by no means an easy 

 matter to sharply define the two genera. Chaudoir relies on the quadri- 

 setose ligula of Plochionus, bisetose in Callida. The structure of the 

 fourth tarsal joint whether bilobed or emarginate does not separate all 

 the Plochioni, but it must be admitted that in Callida the lobes are 

 longer and more divergent. 



Chaudoir properly separates the species of Plochionus, forming two 

 sub-genera which seem nearly parallel with the two genera created at 

 the expense of Callida. 



Our species are as follows : 



Fourth tarsal joint emarginate; tarsi flattened above; ungues with short pecti- 

 nation pallens Fab. 



Fourth tarsal joint bilobed; tarsi not flattened, more slender; ungues with longer 

 pectination. 



Color above uniform, piceous or a little paler timidiis Hald. 



Rufo- testaceous, elytra bicolored. 



Elytra with a submarginal spot and common sutural piceous vitta. 



amauclus Newm. 



Elytra piceous with a narrow margin and large oval discal space rufo- 



testaceous dorsalis n. sp. 



P. pallens Fab. — Piceo-testaceous. Head smooth, a moderately deep im- 

 pression each side of the front. Thorax broader than long, base wider than 

 apex, sides arcuate in front, obliquely narrowing to the hind angles which are 

 rectangular, lateral margin broad, disc feebly convex, median line entire, surface 

 obsoletely transversely wrinkled. Elytra deeply striate, strise obsoletely punctu- 

 late, intervals slightly convex, sparsely obsoletely punctulate. Body beneath 

 smooth, shining. Length .26 — .38 inch; 6.5 — 9.5 mm. 



Male.— Anterior tarsi with four joints moderately dilated, the first three lamel- 

 late-papillose beneath, middle tarsi less dilated, with the second and third joints 

 lamellate beneath. Anal segment bisetose each side. 



Female. — Tarsi not lamellate. Anal segment as in male. 



TKANS. AMER. ENT. SOO. X. (37) AUGUST, 1882. 



