190 GEO. H. HORN, M. D. 



Elytra coarsely, not closely punctured : punctures of thoracic series large 



and deep umbrinus. 



Elytra sparsely punctured, margin and apex testaceous. 



flavolimbatus. 

 Thorax quadrangular, very little or not narrowed in front. 



Elytra clear red, very sparsely punctate palliatus. 



Elytra piceous or black, at least moderately punctate. 



Abdomen densely finely punctate, opaque ; elytra with brownish or red- 

 dish spaces pubes. 



Abdomen rather distantly and coarsely punctured, more shining; elytra 

 totally black with aeneous lustre. 

 Anterior tarsi of male broadly dilated but not patellate; the last ventral 

 emarginate but not impressed. 



Penultimate ventral of male incised at middle grandicollis. 



Penultimate ventral of male entire puberuliis. 



Anterior tarsi of male patellate; penultimate ventral very slightly 



emarginate at middle. 



Black species; the last ventral of male emarginate, and rather deeply 



longitudinally impressed. 



Abdomen above unequally punctured, the basal segments very 



sparsely the apical more densely ; thorax narrower than the 



elytra qiiadrieollis. 



Abdomen above equally sparsely punctured ; thorax as wide as the 



elytra Theveneti. 



Piceous or brownish; last ventral of male not sulcate; legs and basal 



joints of antennae pale debilis. 



3. Species of moderate size, antennae slender, the outer joints longer than wide. 

 Elytra moderately densely punctured ; abdomen very distinctly punctured. 



varians. 

 Elytra sparsely punctured, slightly aeneous; abdomen very inconsjiiciiously 



punctured longicornis. 



Species small or minute; antennse shorter, outer joints quadrate. 

 Thorax as wide as long ; posterior dorsal puncture more distant. 



discoideu!«. 

 Thorax longer than wide; punctures deep and equidistant. 



thermaruiii. 



From the remarks on distribution appended to the different species it 

 will be observed that a very large proportion occur in the Eastern Hemis- 

 phere, while several seem to be cosmopolitan. 



P. gracilicorilis n. sp. — Form moderately elongate, black, shining; elytra 

 reddish brown, darker in a broad triangle along the suture, femora and coxae very 

 pale, tibise and tarsi darker ; antennae a little longer than the head and thorax, 

 piceous, basal joint yellow, joints 2-10 very nearly equal in length and very slen- 

 der ; head elongate oval, similar in the sexes, the hind angles smooth ; thorax 

 oval, wider than the head, as wide as long, narrowed in front, not sinuate on the 

 sides, dorsal punctures fine, the posterior more distant ; elytra a little wider than 

 the thorax, conjointly wider than long, reddish brown, darker in the scutellar re- 

 gion and along the suture ; surface feebly shining, moderately densely finely pune- 



