206 GEO. H. HORN, M. O. 



The characters above given are essentially the same as those given by 

 Dr. LeConte, the only other point in which it is observed to differ from 

 Throscus is in the sudden obli((ue narrowing of the anterior tibi:ie at tip. 



There is but one species at present known. 



P. Horuii Lee. — Form rather elongate, dark brown or piceous, moderately 

 shining, surface clothed with fine short silken pubescence. Head moderately 

 coarsely and closely punctate, front convex. Thorax nearjy twice as wide as long, 

 form rather broadly campanulate, the sides rather deeply sinuate at middle, the 

 hind angles acute and prolonged over the humeri of the elytra, not carinate; disc 

 moderately convex, slightly depressed at base, surface rather coarsely and closely 

 punctate, a little more finely in front. Elytra a little narrower at base than the 

 thorax, then slightly wider posteriorly, after which they narrow slightly to apex, 

 surface striate, strise punctate, the punctures a little more evident at apex, inter- 

 vals flat, finely alutaceous with obsolete punctures distantly placed in a single 

 series. Prosternum coarsely sparsely punctate, the strise deep, slightly divergent 

 and entire. Metasternum coarsely and closely punctate. Abdomen less coarsely 

 and less closely punctate, the last segment more finely. Length .12-. 18 inch: 

 3-4.5 mm. 



The specimens examined show no sexual differences except that the 

 males are somewhat more slender. 

 Occurs in California and Nevada. 



DRAPKTKS Redt. 



Antennte serrate from the fourth to the tenth joint, received in well defined 

 grooves in the anterior portion of the prosternal suture. Tarsi not received in 

 grooves either in the metasternum or abdomen. 



As the characters of the genus are so thoroughly given in many places, 

 the few words above will sufl&ce at this time. 



Our species are few in number, and as they differ remarkably in color 

 this character can be made use of for separating them, the structural 

 characters will be given in the specific descriptions. 



Thorax black. 



Elytra with a broad sub-basal red fascia — geiiiiii<itii!$. 



Elytra with humeral and sub-apical red spots qiiadripiistulatii*!). 



Elytra entirely black niticliis. 



Thorax red, elytra black rubrioollis. 



All our species have a humeral carina which is the basal termination 

 of a submarginal stria, the true elytral margin is below this carina. The 

 carina of the basal angles of the thorax is also well marked, and in 

 geminatns long, a character which has been passed in silence by Bonvouloiz. 



D. geiniiiatus Say. — Black, shining, very sparsely pubescent, a broad sub- 

 basal red fascia on the elytra sometimes divided at the suture or reduced to a round 

 spot on each side. Antennae piceous, under side and tip of first joint testaceous. 



