86 MANDIBULATA. — COLEOPTERA. 



teriorly, with a black patch in the middle of the base towards the sides, and 

 sometimes a narrow transverse black streak anterior to the latter : elytra rather 

 convex, above black, with the lateral margin broadly yellow, the disc of each 

 with five or six slender luteous streaks, of which the sutural ones are broadest, 

 and placed nearly parallel, the others are narrower, somewhat undulated, and 

 placed rather obliquely; the suture itself is black, and each elytron has three 

 striae of impressed dots : body pitchy-black beneath : four anterior legs luteous, 

 the posterior pitchy-black. Female with the thorax strigose, and the tarsi 

 simple. 



Devonshire and Wilts are, I believe, the chief counties which 

 have produced this fine, and apparently rare, insect. " In a pond 

 near Exeter." — Dr. Leach. " In a pond at Netley." — Rev. F. W. 

 Hope. 



f Sp. 4. cinereus. Luteo-testaceus, thorace antics posticeque nigro, elytris ovalilus 



nigricantibus Jlavo-irroratis. (Long. corp. 6 lin.) 

 Dy. cinereus. Linne. — Hy. cinereus. Curtis, ii. pi. 95. — Steph. Catal. p. 52. 



No. 522. 



Luteo- testaceous : head ferruginous, with the crown and two transverse waved 

 frontal lines black : thorax rather convex, with a black fascia on the anterior 

 and posterior edges, the disc with some delicate abrupt impressed striae : elytra 

 ovate, moderately convex, smooth, black, thickly irrorated with pale pellucid 

 spots, the margin testaceous-yellow, the disc of each elytron with three im- 

 pressed striae : body pale testaceous beneath, the sides of the abdomen obscurely 

 spotted: legs pale testaceous: the female has simple tarsi, and the thorax 

 more deeply lineated. 



Two specimens, male and female, only of this insect have yet 

 been taken in Britain ; they occurred " the beginning of June 1825 ? 

 at Whittlesea Mere." — Messrs. Chant and Bentley. 



Genus LXXXVIL— Dyticus, Geqffroy. 



Palpi, external maxillary, with the three last joints of nearly equal length, the 

 last with its apex obliquely subtruncated : lahrum obsoletely emarginate : man- 

 dibles truncate, emarginate : mentum trilobate, the central lobe bifid. Antennoe 

 with the second joint very short, the basal longest : head broad : scutellum 

 distinct : elytra ovate, smooth, generally sulcated in the females : legs nata- 

 torial: anterior tibia? short: tarsi with five joints : claws didactyle : anterior 

 tarsi of the males patelliform, with suckers beneath ; intermediate dilated at 

 the base. 



This conspicuous genus affords a remarkable example of the 

 attention which is now paid to our indigenous coleoptera: till 

 within these three years, when I first communicated the new acqui- 



