78 HYDRADEPHAGA. — GYRItfiDiB. 



of the elytra yellow; hinder coxae rounded. (L. 1 in. 5-6 1.) Yaxley 

 P'ens ; Botanic Garden, Cambridge ; Bottisham ; Elsemere and Bomere, 

 Salop : 3-6, 

 (G06 | latissimus L. ii. 665. — Pz. F. lxxxvi. f. 1 <J f. 2 $ . — Ste. M. ii. 

 91. note. — Ovate, rather flat ; outer margin of the elytra dilated ; black ; 

 the margins of the thorax, a streak on the outer edge of the elytra and 

 body beneath luteous; hinder coxae acuminate. (L. 1 in. 8 1.) Impro- 

 perly given as British,. 



102 Cymster Curtis, 



607 f Roeselii Fab. E. i. 259. — Cur. iv. pi. 151. — Ste. M. ii. 92. — 

 Ovate, flattish ; above olivaceous ; the mouth, lateral margins of the thorax, 

 and a submarginal streak on the elytra yellow ; elytra obscurely striated ; 

 body beneath, legs and antennas, pale testaceous. (L. 1 in. 1 1.) Near 

 Walton, and Colchester, in Essex : 8-9. 



103 Acilius Leach. 



608 sulcatus L, ii. 666. — Don. ii. ph 68. f. 5. $ — Ste. M. ii. 93. — Short? 

 ovate ; fuscous : mouth, 4 frontal crescents, margins of the thorax, and a 

 short transverse fascia in the middle, dilated at each end, luteous ; body 

 beneath black, sides of the abdomen spotted with yellow ; hinder legs 

 black, tip of the thighs yellow. 9 wlt ^ 2 foveas on the thorax, and 4 broad 

 hairy channels at the base of the elytra. (L. 7-9 1.) 



Var. ? Ac, scoticus Curtis ? — Ste. M. ii. 93. — Thoracic band interrupted 

 in the middle ; outer margin of elytra clouded with fuscous ; abdomen with 

 small yellowish spots on the sides, its segments edged with dull red. Most 

 abundant everywhere in England ; also common in Scotland : ^. 



609 fasciatus De. G. iv. 297. ? — Ac. canaliculars Ste. M. ii. 94. — \ Ac. cali- 

 ginosus Cur. ii. pi. 63. — Ovate ; fuscous : head in front and crown with a 

 transverse line, the margins of the thorax and a short band in the middle 

 (dilated into a roundish spot at each end) yellow ; abdomen and legs yel- 

 low ; the former sometimes striped with black : <j> with 4 hairy channels 

 at the base of the elytra. (L. 6^-7 1.) Stilton, and Yaxley Fens; and near 

 Edinburgh : 5-7. 



Fam. 9. GYRINID^ Leach. 



civ. Gyrinus Body moderately convex, very glossy : internal max. palpi dis- 

 tinct : labrum short, transverse : elytra glabrous, striated, not reaching to the 

 apex of the abdomen, the last segment of which is flat, and rather acute. 



cv. Orectocheilus Body convex : internal max. palpi obsolete : labrum pro- 

 jecting : elytra pubescent, punctate, not striated, covering the apex of the 

 abdomen, the terminal segment of which is conical. 



104 Gyrinus of Authors. 



G10 ameus Leach. — Ste. M. ii. 95. — Oblong-ovate; above very glossy 

 blue-black ; beneath dull brass : head, edges of the thorax and of the elytra, 

 the reflexed margin of the latter, and the antennas, brilliant brass ; elytra 

 deeply punctate-striate ; legs red; 4 hinder femora rather dusky. (L. 

 3-3| 1,) Ditches near the Surrey Canal; River Dart, near Spitchweek ; 

 Bottisham ; Duddingston Loch, &c. : 3-9. 



611 marinus Gyll. i. 143. — Ste. M. ii. 96. — Oblong-ovate, blue-black, 

 shining ; beneath brassy : elytra deeply punctate-striate, the suture and 

 outer margin greenish-brass; the reflexed margin glossy-brass; legs 

 pale-red: — disc of elytra sometimes dull-red. (L. 2^-3.1.) Carlisle; 

 Lochend ; Saltcoats-, Devonshire; Bottisham ; Scotland, &c. : 4-6. 



