96 MANDIBULATA. — COLEOPTERA. 



pressions on the forehead : thorax ahove convex, with a crenated stria on each 

 side within the anterior margin, and two rather obsolete ones towards the 

 middle; the lateral margin bright ameous : scutellum brassy : elytra subovate, 

 deeply punctate-striated, with the suture and outer margin bright-brassy, 

 the reflexed margin deep pitchy-black, with a bright brassy gloss : body of a 

 blue or greenish tinge beneath, glossed with brassy : legs rufo-ferruginous ; 

 the four posterior femora somewhat obscured with dusky: antennae blue- 

 black. 



Extremely abundant in ditches by the side of the Surry Canal, 

 near its junction with the Croydon. " Duddingstone-loch, near 

 Edinburgh ; in a deep pool in the river Dart ; and in a pond near 

 the river, not far from Spitchweek." — Dr. Leach. " Common near 

 Bottisham. ,, — Rev. L. Jenyns. 



Sp. 2. marinus. Oblongo-ovatus, nigro-coeruleus, nitidus, suhtus <zneus, elyt'ris 

 fortius punctato-striatis, margine injlexo csneo. (Long. corp. 2^ — 3lin.} 



Gy. marinus. Gyllenhal. Steph. Catal. p. 53. No. 538. 



Oblong-ovate, blue-black, shining : head and thorax sculptured as in the last, 

 but without the brassy tinge : elytra but little dilated, rather deeply punctate- 

 striated, shining blue-black, with the suture and margin greenish-brass, and 

 the inflexed margin glossy-brass: body beneath shining brass: legs pale 

 rufescent. 



Var. -/S. With the scutellum, suture, and upper margin of the elytra concolorous. 



Var. y. Steph. Catal 1. c. var. /3. With the disc of the elytra more or less fer- 

 ruginous. 



Distinguished from the last by its smaller size and less brilliant colours. 



As its name indicates, this species usually frequents waters in 

 the vicinity of the ocean. " Abundant near Carlisle ; in Lochend, 

 Scotland ; and near Saltcoats, Devonshire." — Dr. Leach. " Common 

 at Bottisham." — Rev. L. Jenyns. 



Sp. 3. minutus. Plate XIII. f. 1. Oblongo-ovatus, suprd ccerulescente-virescens, 

 nitidus, suhtus rufo-testaceus, elytris punctato-striatis margine injlexo pedi- 

 busque testaceis. (Long. corp. l| — 2\ lin.) 



Gy. minutus. Fabricius. — Steph. Catal. p. 54. No. 539. 



The least species of the genus : more elongate and slender than the next ; deep 

 glossy greenish-blue above: head and thorax as in Gy. aeneus: scutellum 

 short, sometimes aeneous : elytra elongate, convex, rather deeply punctate- 

 striate, deep blue-black, with the outer edges glossed with brassy ; the inflexed 

 margin pale-testaceous : the body beneath, and legs the same : the intermediate 

 segments of the abdomen sometimes pitchy-black. 



Rather a scarce species ; not frequently met with near London, 

 but more abundant near Bristol and Swansea. " Near Ashburton, 

 Devon."— Dr. Leach. <f Netley."— i?m F. W, Hope, 



