poiierior legs in the males on both sides^ and in the females above only, 

 ciliated; claws unequal^ the upper one fixed, the lower a little shorter; body 

 ovalj rather convex; elytra not striated transversely: stature moderate; 

 colour black, sometimes with a brassy tinge. 



Page 83. Col. 4-notatus. In Mr. Davis's cabinet is a specimen of this insect. 



The genus HYDATICUS has also been divided by continental writers, 

 Eschscholtz having formed the genus Graphoderus to embrace Hy. 

 cinereus, Liiine, aud its allies, which have the body broader and more 

 convex than the true Hydatid, and the intermediate tarsi of the males are 

 less dilated. 



Page 86. Genus 87 a. LEIONOTUS, Kirby, 



Differs from Dyticus in that in both sexes the elytra are smooth, and also in 

 some points as to the form of the spines at the base of the posterior tro- 

 chanters ; usually considered as the apex of the sternum : it embraces two 

 indigenous species, viz. Dyt. conformis (v. ii. p. 87), and Dyt. circumcinctus 

 (v. ii. p. 87). 



Page 92. Cybister Roeselii. This insect has been again found in England, 

 and is in Mr. Davis's cabinet. 



Page 96. Sp. 3 a. Gyrin'us aeratus. Steph. Nomen. 9,d edit. col. 19. — Oblongo- 



ovatus, supra nigro-ceneus nitidus, subtus ceneus, elytris profundi punctata-- 



striatis margine inflexo ceneo. (Long. corp. 2 lin.) 

 Oblong-ovate, above glossy brassy-black; beneath bright brassy; elytra 



deeply punctate-striate, with the inflexed margin brassy; femora pitchy ; 



tibiffi and tarsi testaceous. 

 Found by Mr. Griesbach on the banks of the Cam, near Cambridge. 



Page 98. Gy. villosus has been formed into a geims by the name Orectochilus^ 

 Eschscholtz— to be retained in preference to Potamobius, Leach (a genus of 

 Crustacea) : its principal distinctions consist in the porrected labrum, and 

 its villose, convex, fusiform body. 



Page 102. Sp. 7. Heterocerus pusillus. Hope MS.— Steph. Nomen. 2d edit, 

 col. 19. — Augustus, elongatus, convexus,fuscus, sericeo-pubescens, elytris fasciis 

 macuUsque obsoletissimis rufescentibus, antennis pedihusque obscure testaceis. 

 (Long. corp. 1| — 2 lin.) 



Very long, narrow, convex ; fuscous, with a golden pubescence ; elytra with 

 very obscure reddish spots and fasciae ; antennae and legs dull testaceous. 



Taken abundantly in North Wales by the Rev. VV. F. Hope. 



Page 103. Genus 92 a. DllYOPS, Olivier. 



AntennoE placed in a groove beneath the eyes, with the club somewhat pecti- 

 nated, with sharp teeth; thorax without impressed lines; legs elongate; 

 anterior longer than the middle. 



The longer legs, substriated elytra, and dissimilar antennsE, distinguish this 

 genus from Parnus. 



2e2 



