DYTICIDiE. — COLYMBETES. 77 



in being a little smaller, in wanting the ferruginous margins to the thorax, 

 and in having the sculpture more obsolete. 



Found occasionally with the foregoing insect. " Dartmoor."— 

 Dr. Leach. " Netley, Salop, in ditches.'— Rev. F. W. Hope. 



Sp. 25. nigro-ameus. Oblongo-ovatus, obscuro-ameus, Icevis, ore thoracis elytro- 

 rumque marginibus pedibusque piceo-brunneis. (Long. corp. 4 — 4^ lin.) 



Dy. mgro-aeneus. Marsham. — Co. nigro-aeneus. Steph. Catal. p. 50. No. 505. 



Oblong-ovate, dull brass, smooth : head with two very distinct transverse rufous 

 spots : thorax nearly as in the two last, with the margins pitchy-brown, the 

 elytra oblong-ovate, black-brass, immaculate, with the margins pitchy-brown, 

 the disc with minute impressions, placed in three longitudinal lines: body 

 beneath, legs, antennae, and mouth pitchy-brown. 



Var. |S. With the plurae black. 



Not common : found near London in the spring, in ponds on 

 Epping-forest, and Wimbledon-common. " Aldborough, Suffolk." 

 — Rev. F. W. Hope. " Scotland."— J. C. Dale, Esq. 



Sp. 26. femoralis. Oblongo-ovatus, nigro-subameus, depressior, punctulatus, tho- 

 racis elytrorumque lateribus dilutioribus, pedibus riifis. (Long corp. 2f — 3 lin.) 



Dy. femoralis. Paykul. — Co. femoralis. Steph. Catal. p. 50. No. 506. 



Small: oblong-ovate, depressed, punctulated, brassy-black: head, with the 

 mouth, labrum, and margin of the forehead, testaceous; and two transverse 

 spots on the crown rufous : thorax moderately convex, shining blackish-brass, 

 with the lateral margins indeterminately testaceous-red : elytra ovate, a little 

 convex, brassy-black, with the margins and base indeterminately paler, the 

 disc punctulated, and also having three irregular rows of deeper impressions 

 on each elytron, and near the suture a fourth of rather obsolete dots : body 

 pitchy-black beneath, or black : antenna? and palpi black at the apex : legs 

 pale rufescent, the hinder femora sometimes with a dusky patch in the middle; 

 the anterior thighs thickened ; the male with a dense pale fringe beneath, and 

 in the female slightly ciliated. 



Not very common near London, where it is occasionally found, 

 as well as in Norfolk. " Southend, and Kensington-gardens." — 

 Rev. F. W. Hope. iC At Anglesea-abbey, Cambridgeshire, but not 

 plentifully." — Rev. L. Jenyns. " Parley-heath. r, — Mr. Ingpen. 



Sp. 27. striolatus. Oblongo-ovatus, subdepressus, niger, longitudinaliter subti- 

 lissime striatus, striis anastomozantibus, antennis pedibusque rufis. (Long, 

 corp. 3^ lin.) 



Dy. striolatus. Gyllenhal. — Co. striolatus. Steph. Catal p. 51. No. 512. 



Small, oblong-ovate, rather depressed, black, longitudinally finely striated, the 

 striae frequently anastomozing, as in Co. bipustulatus : head glossy-black, 

 with the mouth, labrum, and margin of the forehead, ferruginous; the crown 



