216 ADEPHAGA. [Gi/nnu-s. 



2. G natator. Narrower, the sides more rounded, and the internal 

 strite very obsolete or entirely wanting towards the base of the elytra. 



Coramou in Scotland, but rarer further south (Cambridge, &c.) ; at Deal a form 

 occurs with the form of natator and the punctuation of mergiis. 



Dark dull forms of the species are occasionally found ; in one form or 

 another it is one of the most abundant and common beetles throughout 

 the kingdom. 



Gr. Suffriani, Scriba. This species is rather closely allied to G. 

 natator, but is much smaller than the average specimens of that insect, 

 and may be distinguished by the punctured stripe of the elytra not be- 

 coming finer towards suture on disc ; the reflexed margin of the elytra 

 is pitchy and not clear red, and the punctures on the elytra are not 

 brassy ; the apex of elytra is truncate almost in a straight line ; accord- 

 ing to M. Bedel G. natator has the apex of elytra not raised and marked 

 with a series of punctures placed transversely, whereas in G. Suffriani 

 this series is obsolete and the apex is raised ; this does not, however, 

 appear to be a constant or reliable character. Long. 4|-5, lat. 3 

 mm. 



Rare; Horning Fen, Norfolk; Wicken Fen ; Sandwich; Scotland, Dumfries. 



G-. marinus, Gyll. Ovate, not very convex, upper side bluish 

 black, shining, the sides brassy, the elytra strongly punctate- striate, the 

 internal striae being almost uniform in strength with the outer ; punctures 

 deep especially towards apex, Avhere the interstices are somewhat convex ; 

 underside, including reflexed margins of elytra, brassy black; legs (except 

 claws) red; male shining with interstices obsoletely punctured, female 

 rather dull with interstices thickly punctured. Long. 5-7, lat. 2|— 3-|- 

 mm. 



Local but rather common in England both near the coast, in brackish water, and 

 inland, and widely distributed from Northumberland to Devonshire; it is found in 

 the midland districts; in Scotland the variety only occurs; Ireland, near Belfast and 

 Dublin, and probably common. 



V. opacus, Sahl. This variety, which by spme authors is considered 

 distinct, differs from the type in being on the average considerably 

 smaller, and in having the strise on the elytra finer, especially the inner 

 ones : a form occurs in which the upper surface is altogether dull and 

 opaque. Long. 4|— 6, lat. 2^-3 mm. 



Local in England; Tottenham; West Drayton ; Woking; Bishops Wood; Horning 

 Fen; Stony Stratford ; Beverley; Northumberland; it is not found, apparently, in 

 the south. Scotland, common in both Lowlands and Highlands, Forth, Tay, Dee, 

 Solway, and Clyde districts. The dull variety resembles G. minidus, in company with 

 which Dr. Sharp found it at Invercannich, Inverness-shire. 



OI&ECTOCKZZiUS, Lacordaire 



This genus contains about thirty-five species, Avhich are chiefly found 

 in the East Indies and Africa ; they are, as a rule, nocturnal in their 



