68 MANDIBULATA. — COLEOPTERA. 



or less distinct transverse reddish spots on the crown : thorax slightly con- 

 vex, brassy-black, with the lateral margins pale-ferruginous : elytra elongate, 

 attenuated towards the apex, above convex, dull blackish-brass, with the outer 

 margin pale-yellowish, the disc with an obsolete punctate stria : body pitchy- 

 ferruginous beneath, the abdomen sometimes paler : legs and antenna? pale- 

 reddish. 



Common in clear ditches and streams throughout the metropo- 

 litan district: also in Norfolk, near Bristol, and in Devonshire. 

 " Near Durseley, in Gloucestershire." — Rev. F. W. Hope. " In 

 streams, Bottisham, not uncommon." — Rev. L. Jenyns. " Glan- 

 ville's Wootton, and Scotland." — J. C. Dale, Esq. " Common 

 near Andover." — Rev. G. T. Rudd. 



Sp. 7. striatus. Oblongus, ?iiger,posterius attenuatus, thoracejlavescente, media 

 incequaliter nigro, elytris subtilissime transversim strigosis. (Long. corp. 

 8£— 9% lin.) 



Dy. striatus. Linne.—Mart. C.pl.34>.f. 27?— Co. striatus. Steph. Catal. p. 49. 

 No. 488. 



Oblong, posteriorly attenuated, black : head glossy, with fine irregular abbre- 

 viated striae ; the labrum and a broad band between the antennae yellowish, 

 and the crown with two, more or less apparent, transverse ferruginous spots : 

 thorax very slightly convex, throughout very faintly and irregularly strigose, 



The late Mr. Tuther assured me that he caught two specimens of this insect in a 

 pond between Snaresbrook and Wanstead, in Essex, twenty years since. Never- 

 theless, as it has neither been recaptured (although most diligently searched 

 for, by several most indefatigable collectors and by myself, in the pond above 

 alluded to, and in the neighbourhood), nor known to inhabit any other part 

 of Europe, but, on the contrary, is a native of the Cape of Good Hope, 

 whence the Rev. F. W. Hope has received specimens direct, I conceive that 

 its admission into the indigenous Fauna is questionable, especially as the 

 former possessor of the specimens not only dealt in insects, but had, inter 

 alia, Silpha marginata Fabricius, a species of Mygale, and some other exotic 

 species, in his cabinet, as British. One of the specimens above referred to is 

 in the British Museum by the MS. name elongatus of Leach ; the other in 

 that of Mr. Vigors, by the name laevigatus of Wilkin ; the specimens having 

 besn purchased at a high price by Dr. Leach and Mr. Wilkin. 



Forster, in his Century of Insects, has a Dytiscus glaber that, unless intended 

 for a variety of Co. ater, which is barely possible, in some respects agrees with 

 the above insect ; but his description is far too concise and indefinite to de- 

 termine the point: he says, " Antennis setaceis compressis, fuscus, elytris 

 glabris ventre pedibusque ferrugineis. Obs. Magnitudo Dytisci striati, cut 

 admodum simile insectu??i:" and the observation seems to remove it from 

 Co. ater. 



