544 Cvleopterological Notices, VI. 



bescence evenly distributed, as indicated by these descriptions, is 

 known to me from the true Pacific coast faunal province. 



The statement in the table of LeConte (Proc. Acad., 1866, p. 

 351), that the prothorax in cayiescens, difficilis and rotundicollis 

 is not wider than long is very much in error, and is another ex- 

 ample of a singular personal equation previousl3^ alluded to (Col. 

 Not. Ill, p. 205), by which the author quoted continually over- 

 estimates the length of this part of the body in terms of its width; 

 at the same time, it should be said that this overestimation is more 

 or less general among systematic writers, and results largely from 

 a natural cerebral bias which it is difficult to explain satisfac-. 

 torih' ; it is only mentioned in the present connection because of 

 its excessive amount. 



1. L,. rotundicollis Lee. —Proc. Acad. Nat. Sci., Phila., VI, p. 170 

 (Dasytes);!. c, 1866, p. 358 (Listrus). 



Elongate-oval, strongly convex, polished throughout, black 

 with a dark steel-blue metallic reflection ; legs and antennte black 

 throughout ; pubescence very short, decumbent, coarse and 

 sparse, denuded near the suture behind the middle of each ely- 

 tron, longer and finer beneath. Head three-fifths as wide as the 

 prothorax, rather sparsel}' punctate, broadl}' biimpressed ante- 

 riorly. Prothorax nearly one-half wider than long, widest 

 slightl}^ behind the middle, the sides arcuate with the cilia 

 strongl}^ recurved; apex four-fifths as wide as the base, broadly 

 arcuate, the angles obtuse and decidedly blunt ; disk evenly con- 

 vex, deepl}^ and sparsely punctate, the interspaces flat and finelj' 

 and closely rugulose, becoming coarsel}' rugose onlj- near the 

 sides. Scutellum densel}' albido-pubescent. Elytra three-fourths 

 longer than wide, onl}' slightlj'^ wider than the prothorax, the 

 sides parallel and nearl}' straight, becoming rather abruptly 

 strongly convergent and feebly arcuate in apical third, the apex 

 conjointl}^ narrowly rounded ; disk very coarsel}' but not densely 

 punctate, less coarsely so toward apex. Under surface reticulate 

 but not distinctly' punctate. Length 2.8 mm.; width 1.0 mm. 



California (San Jose) — Cab. LeConte. The above outline is 

 taken from the female, in which sex the fifth ventral is much 

 longer than the fourth, truncate at apex and unmodified on the 

 disk. In the male the fifth segment is, according to LeConte, 

 somewhat excavated longitudinally, the excavation fringed with 

 black velvet\' pubescence. 



