8 GEO. H. HOKN, M. 1). 



Three % (Specimens have been seen, one of them kindly given me 

 by Mr. J. J. Rivers, of Berkeley, Cal. Two of them have the 

 fourth antennal joint ()rolonged in a process, one as figured for kirti- 

 eollis, a second shorter, a third without any process. The latter is 

 smaller than the others and probably is merely a feebly developed 

 specimen, although antennal differences are usually specific. All 

 were taken in the same flight. 



Occurs near Santa Cruz City, California. 



P. Itirficollis Scbaufnss. — Oval, slightly oblong, not broader behind, jiicc- 

 ous and shining above, castaneous beneath, fimbriate and clothed beneath with 

 yellowish hair. Clypeal horn with rather strongly divergent sides, a distinct 

 notch separating it at base from the lateral processes. Thorax more than twice 

 as wide as long, sides more abruptly narrowed from the middle to apex, broadest 

 atba.se, hind angles distinct, but obtuse; disc somewhat declivous in front and 

 broadly flattened, the surface more coarsely and closely punctured than in the 

 other species, the punctures in the depression very coarse, deep and close, with 

 semi-erect hairs sparsely scattered over the thorax, more numerous in front. 

 Elytra with feebly arcuate sides, sntural stria deep, the interval distinctly broader 

 behind, the geminate striae very faint, the surface sparsely punctate, compara- 

 tively smooth. Length .80 inch ; 20 mm. 



Male. — First two joints of antennte very like fimbr lata, third nearly 

 as large as the first; fourth short, with a slender process one-half as 

 long as the lamella of the fifth ; joints five to eleven 

 forming a long club, the lamella? gradually larger to 

 the eighth, then gradually shorter. 



Female. — Ovate, robust, convex, reddish-brown. 

 Clypeal horn short, broad and feebly emarginate, vertical horn short, 

 rather deeply emarginate. Thorax similar in outline to the male, 

 but not more than twice as wide as long, not impressed in front, 

 moderately strongly and closely punctate, nearly equally over the 

 entire surface, median line smooth, without erect hairs. Elytra 

 broadest behind the middle, sutural stria not deeply impressed, the 

 interval not wider behind, geminate sti'ite very faintly indicated, sur- 

 face more sparsely punctate than the thorax. Legs very robust. 

 Length 1.32 inch; 88 mm. 



The antennae of the female are of the same type as the male, but 

 much shorter and with the lamellie short. First joint conical, second 

 7 ^^^ globular as well as first, third more slender, half as long 

 las first, fourth short, transverse, angulate on inner side, 

 fifth prolonged in a lamella, three-fourths as long as 

 sixth, joints six to ten nearly equal in length, the eleventh shorter. 



