130 CLAVICORNIA. [Pt ilium. 



B. Elytm considerably broader than thorax ; 



sculpture of thorax rather coarse P. SPENCEI, All. 



ii. Thorax constricted behind. 



1. Head and thorax tuberculate ; thorax with at 

 most a very indistinct impression on each side at 



base P. CALEDONICUM, Sharp. 



2. Head and thorax foveolate-punctate ; thorax 

 with deep lateral impressed lines reaching beyond 



middle P. HALIDATI, Matlh. 



II. Thorax plainly channelled in middle. 

 i. Thorax with lateral impressed lines, which are 

 parallel. 



1. Impressed lines of thorax deep ; elytra con- 

 siderably dilated, rather coarsely sculptured . . P. AFFINE, Er. 



2. Impressed lines of thorax shallow ; elytra scarcely 



dilated, finely sculptured P. INSIGNE, Matth. 



ii. Thorax with lateral impressed lines, which con- 

 verge in front P. C^SUM, Er. 



iii. Thorax with lateral impressed lines which diverge 

 in front. 



1. Elytra longer ; head and general form narrower ; 



average size larger P. EXAKATUM, AIL 



2. Elytra shorter ; head and general form broader ; 



average size smaller P. MTEMECOPHILUM, All. 



iv. Thorax with lateral impressed lines very obsolete 

 or absent P. FOVEOLATOM, All. 



P. ILunzei, Heer. Oblong, rather convex, black, dull, rather thickly 

 clothed with grey pubescence, closely tuberculate ; head large and broad, 

 eyes small, rather prominent, antennae rather short and stout, pitchy 

 black ; thorax transverse, longer and broader than head, broadest at 

 base, with sides slightly rounded, not channelled ; elytra oval, about one 

 and a half times as long as head and thorax, deeply asperate in oblique 

 rows ; legs pitchy, occasionally yellow ; under-side pitchy, with the 

 abdomen lighter, and the mouth and coxse yellow. L. \ mm. 



In hot-beds; locally abundant, and probably widely distributed; Ashtead, Surrey ; 

 Edgbaston and Know'le ; -Cheshire ; Manchester ; Scotland, Solway district. Ireland, 

 near Dublin. 



P. brevicolle, Matth. Short, oblong, rather depressed, fuscous- 

 black, rather thickly clothed with short dark hairs ; head large, broad, 

 elongate in front, eyes prominent, antennse very long and stout, yellow ; 

 thorax very short, much shorter than head, as well as head thickly and 

 finely tuberculate ; elytra oblong, rather depressed, nearly parallel-sided, 

 scarcely broader than thorax, very closely covered with rather large 

 tubercles ; abdomen scarcely exserted ; logs long, robust, yellow, tibia3 

 slightly dilated ; under-side pitchy-black, with mouth and coxae yellow. 

 L. | mm. 



Very rare ; one specimen taken near Weston, Oxfordshire, by Rev. A. Matthews. 

 This very distinct species may -easily be known by its extremely small 



