132 CLAVICORNIA. [Ptilium. 



moderate-sized tubercles ; elytra elongate-oval, broadest at middle, mo- 

 derately asperate in irregular transverse rows, interstices shining ; legs 

 slender, clear yellow ; under-side fusco-testaceous. L. |-| mm. 



Found in numbers by Dr. Bucbanan White and Dr. Sharp under tbe bark of a dead 

 Scotch fir at Braemar, Scotland. 



In sculpture and pubescence this species is very similar to P. Spencei ; 

 it is an interesting species, as connecting this Litter insect and its allies 

 with the abnormal P. croaticum. 



P. cfcsum, Er. (latum, Gyll.). Bather broad, castaneous, sparingly 

 clothed with very short pale pubescence ; head rather large and broad ; 

 antennae rather short and stout, clear yellow ; thorax larger, longer, and 

 broader than head, with the sides rounded and widened in middle and 

 narrowed behind, alutaceous and not tuberculate, with a central channel 

 and two impressed lines, one on. each side, which converge in front, pos- 

 terior angles almost right angles; elytra rather short, dilated behind, 

 closely and very finely asperate ; legs clear yellow ; under-side castaneous, 

 with the mouth, coxae, abdomen, and posterior margin of metasternum 

 yellowish. L. f mm. 



Very rare ; Cambridgeshire, six specimens (Crotch). 



P. affiiie, Er. Considerably larger than the preceding species, and 

 of a darker colour, being fuscous or nigro-fuscous ; it is also differently 

 sculptured, the head and thorax being finely and closely tuberculate, and 

 the elytra being more coarsely sculptured ; the thorax is widest behind 

 middle, and is furnished with a central channel and a deeply impressed 

 line on each side, all three being parallel ; the elytra are more gradually 

 rounded, and are widest about middle, instead of being widest behind as 

 in P. ccesum, and the antennae are pitchy, lighter at base. L. f mm. 



Very rare ; three examples have occurred at Wicken Fen, Cambridgeshire, by 

 sweeping ; I have also received two specimens from the South of England ; it appears 

 also to be found under dung. 



P. exaratum, All. (canaliculatum, Er.). Elongate, convex, rather 

 shining, clothed with short greyish silky pubescence, fuscous, very finely 

 and closely tuberculate ; head rather small but elongate, much narrower 

 than thorax, antennae clear yellow, club slightly thickened, last joint 

 elongate ; thorax with sides rounded in front and contracted behind, 

 broadest a little before middle, with a central channel, and two indis- 

 tinctly impressed lateral lines or impressions, which diverge in front ; 

 elytra long, oval, more plainly sculptured than head and thorax ; 

 abdomen slightly exserted, with the last segments testaceous ; legs clear 

 yellow. L. f-f mm. 



In vegetable refuse, hot-beds, &c., also in cow-dung ; not uncommon, and probably 

 much more widely distributed than is at present known ; Tonbridge and other 

 localities in the South and Midlands (Gumley, Knowle, &c.). 



P. myrmecophilum, All. (inguilinwn, Er. ; v. discoideum, Vill.). 



