Psilothrix.] 8BRRICORXIA. 163 



than thorax, parallel-sided, elongate, rather strongly punctured, but less 

 closely than thorax, with feeble traces of raised lines ; legs and under- 

 side metallic green or bluish, the former with the tarsi somewhat in- 

 crissate. L. 4-6 mm. 



Male with the last ventral segment of abdomen widely and deeply im- 

 pressed and broadly emarginate at apex. 



On flowers, especially of Hieracium ; local ; occurring as a rale near the coast ; 

 Whitstable; Herne Bay; Hastings; Eastbourne; Brighton; Gosport ; Isle of 

 Wight, Freshwater, and very common at Sandown in early summer ; Wey month, 

 Chesil Beach ; Devon ; Cornwall ; it is recorded by Bold as a very doubtful native 

 of the Northumberland and Durham district, and the record is probably an erroneous 

 one, as there is no other English record from any counties north of Kent and Surrey ; 

 the Rev. J. Bristow records it, however, from near Belfast. 



(P. protensus, Gene. This species was introduced by Crotch on the 

 authority of specimens from the Isle of Wight, but it appears to be very 

 doubtfully indigenous; it is at its largest about the size of the smallest 

 P. nobilis, of a bright green or blue colour, and is especially distinguished 

 by having the punctures of the head and thorax flat at the bottom, and 

 again punctured in the middle; the thorax also is more elongate and the 

 upper surface duller than in P. nobilis. L. 4-4| mm. 



It appears to be almost certain that Mr. Crotch's specimens were not the 

 true D. protensum, and the species must therefore be omitted from our 

 lists.) 



DOXiXCHOSOMA, Stephens. 



This genus, in its restricted sense, contains five European species, of 

 which one is found in Britain ; it is easily recognized by its very long 

 and extremely narrow form, and the mealy appearance of the upper 

 surface. 



X>. lineare, Rossi. Very narrow, elongate, and linear, almost fili- 

 form, cylindrical, of a dull obscure bronze-green colour, thickly clothed with 

 short, almost scale-like pubescence, which gives the insect a mealy ap- 

 pearance; punctuation of the whole upper surface very thick and rather 

 fine, but distinct; head with eyes, which are large, rather broader than 

 thorax; antennae longer in male than in female, very feebly serrate, 

 black, with the second joint testaceous; thorax cylindrical and parallel- 

 sided, double as long as broad, with a more or less distinct central 

 furrow, which is sometimes obsolete; elytra broader than thorax, about 

 live times as long as together broad, dehiscent at apex, with traces of 

 raised lines ; under-side rather shining, sparingly punctured and pubes- 

 cent ; legs long and slender, of a dark metallic green colour. L. 5-5 \ mm. 



Male with the head broader and the antennae longer than in female, 

 and with the fifth segment of the abdomen transversely depressed behind 

 and furnished with a shining fovea in the centre. 



Grassy hanks, on the coast, by sweeping in early summer; very local, but not 



M 2 



