198 GEO. H. HORN, M. I). 



Form robust, thorax as wide as long Scliwarzi. 



Form slender, thorax longer than wide ...hudsouicus. 



Anterior tarsi % widely dilated Pettiti. 



Smaller species; thorax very little narrowed infront. 

 Elytra more or less brown or ferruginous. 

 Abdomen beneath densely finely punctured ; anterior coxse piceous; an- 

 tennae slender triaiiguluni. 



Abdomen beneath not densely punctured ; anterior coxse pale ; antennae 



shorter, the outer joints sub-quadrate ferreipenuis. 



Elytra entirely black. 



Antennae slender, the joints all longer than wide. 



Abdomen above and beneath densely finely punctured, anterior and 



middle coxae testaceous caiiriuus. 



Abdomen above and beneath coarsely and rather sparsely punctured ; 



coxse piceous Ootchi. 



Antennse stouter, the outer joints as wide as long. 



Abdomen shining, sparsely and rather coarsely punctate; anterior and 



middle coxai pale arizoneusis. 



5. — Head oval, distinctly narrowed behind the eyes. 



Elytra and abdomen very densely finely punctured and opaque: antennae 



short and stout luicaiis. 



Elytra neither densely nor finely punctate, more or less shining. 



Antennae slender and long, basal joint pale, the joints all longer than wide ; 



abdomen not conspicuously coarsely punctured lomatus. 



Antennae slender, as in lomafun, entirely piceous; elytra more coarsely punc- 

 tate; abdomen more sparsely punctate than lomatus cunctaiis. 



Antennae shorter, the outer joints not longer than wide; abdomen (juite 



coarsely punctured seqiialis. 



Head quadrate in both sexes, not narrowed behind the eyes; abdomen finely 

 punetulate bruiiiieiis. 



With the exception of aluniniis und fii I tnpex the species appear to be 

 native ; possibly one or more of" those in the black series may be tbtind 

 to have been previously described from Northern Europe. 



P. alumnus Eriehs. — Form slender, parallel, color variable; antennae slen- 

 der, as long as the head and thorax, piceous, basal joints paler, joints all longer 

 than wide: head orbicular, hind angles sparsely punctured; thorax a little wider 

 than the head, slightly longer than wide ; sides nearly parallel, dorsal punctures 

 fine and equidistant; elytra a little wider than the thorax, conjointly a little lon- 

 ger than wide, very densely finely )/unctured, opaque, finely pubescent; abdomen 

 densely punctured, punctures coarser than the elytra ; beneath less densely punc- 

 tured than aliove, with rather coarser punctures. Length .18 — .22 inch: 4.5 — 5.5 

 mm. 



ilfu/e. — Anterior tarsi widely dilated: last ventral segment with a slight emar- 

 gination surrounded by a wide gutter; penultimate ventral with a triangular 

 notch at middle. 



i^ema/e.— Anterior tarsi very narrowly dilated ; last ventral entire. 

 This species is very variable in color, and has given rise to several 

 manuscrij)t names. 'J'he forms are as follows : 



