HVDATICUS. DYTICUS. 77, 



yellowish, and 5 or 6 slender parallel lines of the same colour on the disc. 

 (L. 6-6\ 1.) Near Exeter and Netley : 5-6. 



§ B. Body obovate, rather depressed, broad ; interm. tarsi of 6* slightly di- 

 lated : — Graphoderus Esch. 



598 cinereus L. ii. 666. — Cur. ii\ pi. 95. — Ste. M. ii. 86. — Dull yel- 

 lowish : crown and 2 frontal lines black ; thorax with the anterior and 

 posterior edges also black ; elytra dusky, irrorated with yellow, the outer 

 margin testaceous; legs pale testaceous. (L. 6 1.) Whittlesea Mere: 5-7. 



101 Dyticus Geoffroy. 

 § A. Elytra smooth in both sexes : — Leionotus Kirby. 



599 conformis N. A. Hall ( Kunze) ii. 58. — Stu. D. F. viii. pi. 188. f. e. f. 



— Ste. M. ii. 87. — Olive-black ; beneath testaceous, with the sutures 

 of the breast black : margins of the thorax and outer edge of the elytra lu- 

 teous, the disc of the latter finely punctulated ; hinder coxae lanceolate- 

 acuminate ; legs and antenna? testaceous. (L. 1 in. 4 1.) Near Ipswich; 

 Cambridge ; Whittlesea Mere ; Devon : 5-8. 



600 circumcinctus N. A. Hall. (Ahr.) i. 55. — Ste. M. ii. 87. pi. xii. f. 6'. 



— Olive- black, beneath testaceous, spotless : margins of the thorax un- 

 equally, and outer edge of the elytra, luteous ; the disc of the latter with 

 3 continuous punctate stria?, with some remote impressions between each ; 

 hinder coxae very acute ; legs testaceous. (L. 1 in. 3-4 1.) Dykes in 

 Yaxley Fens, in plenty ; Netley ; Lawrence Waltham, &c. : 6-7. 



§ B. Elytra of $ sulcated at the base : Dyticus pr. 



601 angustatus Ste. M. ii. 88. — Oblong-ovate ; black or olive, testaceous 

 beneath, with the sutures of the breast black ; thorax with the margins 

 narrowly, and outer edge of the elytra broadly testaceous-yellow ; scutel- , 

 lum black; hinder coxae very acute. (L. 1 in. 2-3^1.) Yaxley Fens; 

 Bottisham ; Bomere, Salop; 6-7. 



602 circumflexus Fab. E. i. 258. — Ste. M. ii. 88. — Stu. D. F. viii. pi. 

 188. f. a. b. — Oblong-ovate; olive-black; testaceous-yellow beneath; 

 with the sutures of the breast and margins of the abdominal segments 

 black : edges of the thorax and sides of the elytra broadly testaceous- 

 yellow ; middle of the scutellum yellow; hinder coxa? very acute. (L. 

 1 in. 1-4 1.) Battersea fields ; Camberwell ; Kimpton ; Lawrence Wal- 

 tham ; rare near Edinburgh : 3-6. 



603 marginalis L. ii. 665. — Don. v. pi. 161. — Ste. M. ii. 89. — Oblong- 

 ovate, elytra dilated behind the middle ; above dusky-olive ; beneath 

 testaceous-yellow : margins of the thorax and outer edge of the elytra 

 testaceous, within the tip of the latter a yellowish crescent ; hinder coxa? 

 somewhat obtuse. (L. 1 in. 1-4 1.) 



Var. Dy. submarginalis Ste. M. ii. 90. — With the outer edge of the elytra 

 yellowish at the base only. Common in ponds, &c. throughout England ; 

 rather scarce in Scotland. if. 



604 punctulatus Fab. E. i. 259. — Don. xv. pi. 540. — Ste. M. ii. 90. — 

 Oblong-ovate ; above olivaceous-black, beneath black : outer margins of 

 the thorax and of the elytra yellow ; hinder coxa? rounded. (L. 11-14 1. ) 

 Battersea fields, &c. near London ; Hants and Wilts ; Cambr. ; Marton, 

 sparingly ; Cardew Mire ; not rare in Scotland : 3-6. 



605 dimidiatus Berg. N. i. 33. 7. f . 1 . — Cur. iii. pi. 99. — Ste. M. ii. 

 90. — Oblong-ovate ; above dull olive-black, beneath testaceous-yellow : 

 with the sutures of the breast black ; the outer margins of the thorax and 



h 3 



