HYDROPHILlDiE. — HYDROBIUS. 131 



Ripley, in Norfolk, &c. " Bottisham, not common." — Rev. L. 

 Jenyns, " Common at Kimpton." — Rev. G. T. Rudd. " South- 

 end."— Rev. F. W. Hope. 



Sp. 11. marginellus. Oblongo-ovatus y ater nitidus, thoracis elytrorumque mar- 



gine griseo-rufo, striti suturali unicd. (Long. corp. l| — 2 lin.) 

 Hy. marginellus. Fabricius. Steph. Catal. p. 6 J. No. 612. 



Oblong-ovate, deep glossy-black, thickly punctate, with the lateral margins of 

 the thorax and of the elytra griseous-red : head with a fovea over each eye : 

 thorax with too larger impressions on the disc anteriorly : elytra with a single 

 stria on each parallel with the suture : body and legs obscure black : tarsi 

 rufescent : palpi and antennae pale testaceous, the latter with the club dusky. 



Var. (8. With the anterior margin of the thorax broadly griseous-red. 



Not common near London, but found occasionally; also taken 

 near Kingston-upon-HulL " Southend." — Rev. F. W. Hope. 

 " Ponds in Copenhagen-fields." — Mr. Ingpen. 



Sp. 12. affinis. Oblongo-ovatus, niger punctatissimus, thoracis lateribus ely- 



trisque Jusco-cinereis, stria suturali unicd. (Long. corp. 1| — 1| lin.) 

 Hy. affinis. Paykul. Steph. Catal. p. 61. No. 613. 



Size and form of the preceding insect : head thickly punctate, black ; thorax 

 black, with the lateral margins broadly testaceous-brown, the disc punctulate 

 throughout: elytra oblong, thickly and finely punctate, obscure griseous 

 or testaceous brown, with the suture darker, and a single stria on each, not 

 reaching to the base, parallel with the suture : body beneath and femora dull 

 black: tibiae and tarsi ferruginous. 



Var. ft With the head alone black, the thorax and elytra pale testaceous. 



This variety is the Hydrophilus margipallens of Marsham, of which I possess 

 an authentic specimen. In Entomologia Britannica its length is stated to be 

 f line by a typographical error, which the author has corrected in his MS. 

 copy ; and without the assistance of the latter the species intended could never 

 have been ascertained. 



Also taken occasionally near London, but far from common. 

 « Southend.' 1 — Rev. F. W. Hope. 



B. With the body subglobose. 



Sp. 13. atricapillus. Plate XIV. f. 6. Niger punctulatissimus, thorace elytris 

 capitisque punctis duobus lurido-testaceis, elytris postice obsolete punctato- 

 striatis, suturali profundiori. (Long. corp. 2 — 2<| lin.) 



Hy. atricapillus. Mar sham MSS. Steph. Catal. p. 61. No. 614. 



Body and head black, the latter with a lurid or fulvous lunular spot on each 

 side before the eyes; the thorax and elytra immaculate lurid-testaceous, 

 thickly but finely punctulated ; the latter with a rather deep stria parallel with 



K 2 



