6 GEO. H. HORN, M. J). 



Legs much shorter than in the male, the femora more I'obust. Tarsi 

 short, the posterior pair very little more than a thii-d the length of 

 the tibia. Antennae much shorter than in the male, terminated by 

 a four-jointed club, the lamelhe short and thick. 



The oral organs of the female, as far as can be seen without dis- 

 section, are similar to those of the male, except that the palpi are 

 shorter. 



This species most closely resembles Behrensii, but differs in the 

 structure of the male antennte, the color of the hair of the under- 

 side, the finer punctuation of the thora.x and its true black color. 



In dedicating this species to Mr. L. E. Ricksecker, it gives me 

 pleasure to acknowledge his great kindness at all times in aiding my 

 studies. To him I am indebted for both sexes of the present species 

 captured by him near Sylvania, California, Nov. 28, 1887. 



P. fiinbriata Lee— Broadly oval, .slightly depressed, piceous, shining, mar- 

 gins fimbriate and niiderside densely clothed with yellowish-brown hair. Thorax 

 more than twice as wide as long, broadest slightly in front of middle, hind an- 

 gles obtusely rounded. Elytra scarcely broader behind the humeri, sutural stria 

 not deep, the interval very little, if any, broader at apex, the geminate strife 

 very faintly impressed. Length 1.00 — 1.10 inch ; 25-26.5 mm. 



Male. — Antennre as in Rickseckeri from joint"* one to six, seventh 

 })rol()nged nearly half the length of the eighth, last four joints form- 

 ing an elongate chih as in that species. 



At the time Dr. LeConte pid)lished his notes on 

 Pleocoma (Ti-ans. Am. Ent. Soc. 1874, p. 82) no good 

 specimens were known of this insect. I have recently 

 obtained tw'o fine examples through the kindness of 

 W. G. W. Harford, of California. 



Collected in El Dorado County; also in Fresno County, Cal. 

 It is highly probable that the mouth parts described briefly by 

 Dr. LeConte (Proc. Acad. 1859, p. 71) and attributed to this species 

 may belong to some other. This has no great itnportance, except as 

 to the distribution of the species. 



I*. Belirensii Lee. — Oblong oval, sides nearly parallel, piceous, feebly shin- 

 ing, underside and legs castaueous, the margin and body beneath with moder- 

 ately long, reddish-yellow hairs. Vertical horn scarcely emarginate. Thorax 

 more than twice as wide as long, widest at middle, slightly narrower at base, 

 hind angles rounded, disc in frout faintly impressed, a slight impression of the 

 median line at base, surface with moderate punctures not dense, except in the 

 anterior depression, where they are denser and coarser, each side of middle and 

 equidistant, from median line and base a small round fovea. Sutural stria of 

 elytra moderately impressed, the interval very little wider at apex, the gemi- 

 nate striiB distinct, but not deep. Length .85 inch ; 21 mm. 



