Actidium.] CLAVICORNIA. 135 



I. Upper surface pilose, not shilling ; head and thorax 



deeply foveolate-punctato A. COARCTAIUH, Hal. 



II. Upper surface almost glabrous, shining ; hcjid and thorax 



very finely tuberculate or alutacoous A. CONCOLOR, Sharp. 



A. coarctatum, Hal. Linear, elongate, rather convex, dull black, 

 thickly dotted with long silvery hairs j head large, elongate, rounded in 

 front, eyes small, prominent, antennae rather long, clear yellow ; thorax 

 short, transverse, scarcely longer than head, with sides strongly rounded, 

 marked with a large, transverse, reniform impression at base ; head and 

 thorax strongly foveolate-punctate ; scutellum small ; elytra very long, 

 linear, finely but distinctly and closely tuberculate, sutural angles almost 

 right angles; legs rather long and stout, clear yellow, tibiae strongly 

 dilated ; under-side pitchy, with mouth and coxae yellow. L. | f mm. 



Under sea-weed and shingle on the coast ; also in hot-beds, &c., inland ; first taken 

 in Britain on the coast of Ireland by Haliday j Walton-on-Naze (Champion) ; Kings- 

 gate, in profusion in a heap of decaying sea-weed in company with Actinopteryx 

 (T. Wood) ; I have taken it sparingly in a hot-bed at Baiuwood, near Gloucester, for 

 two or three years in succession, in company with Nephanes Titan and Ptilium 

 foneolatum ; this capture is interesting, as confirming Haliday 's record of having 

 taken the species in a hot-bed, which was commonly supposed to have been made in 

 error. 



This species appears to be distributed throughout the whole of Europe, 

 and the African shore of the Mediterranean Sea. 



A. eoncolor, Sharp (Ptilium eoncolor , Sharp). Linear and elongate, 

 somewhat convex, shining, deep black, clothed with very short silvery 

 hairs, so that the surface appears almost glabrous, alutaceous and scarcely 

 tuberculate ; head large and broad, elongate, eyes rather small, not pro- 

 minent, antennse rather short and stout, pitchy-testaceous ; thorax very 

 short, with sides strongly rounded and margined, and very strongly con- 

 tracted behind ; scutellum small ; elytra elongate, linear, not broader 

 than, and almost twice as long as, head and thorax, with sides almost 

 straight, sutural angles obtuse ; legs long, pitchy-testaceous, posterior tibiaj 

 strongly dilated, tarsi very short ; under-side black, with mouth, coxa?, 

 and apex of abdomen lighter. L. f mm. 



In damp sand and shingle on the banks of rivers and streams -, very rare ; first 

 taken by Dr. Sharp and Mr. Crotch on the banks of the Bowmout, at Yetholm, 

 Northumberland, and subsequently by Dr. Sharp in the Solway and Tweed districts 

 of Scotland ; it has also been taken by Mr. Waterhouse (to whom I am indebted for 

 my specimen) near Ripon ; it often occurs in company with Thinolius longipennis, 

 to which it bears a considerable superficial resemblance. 



EURVPTXXiIUlK, Matthews. 



This genus was formed by Mr. Matthews to include the species 

 described by Gillmeister as Trichopteryx saxouica, and usually known as 

 Ptilium saxonicnm ; it is very distinct from Ptilium by reason of its 

 broader form, and by having the abdomen entirely covered by the elytra, 



