283 MANDIBULATA. — COLEOPTERA. 



latter smaller, subconic; the seven following of nearly equal length, oblong, 

 cylindric; the terminal one rather longer, ovate: head deflexed, small: 

 thorax very short, transverse, the anterior and posterior margins bisinuated, 

 the angles rather acute, the lateral edges slightly margined: body hemi- 

 spheric, slightly depressed: legs short; femora compressed, the posterior ones 

 greatly irrcrassated ; tibia? armed at the apex with a stout, elongate, slightly 

 bent spine. 

 Scirtes may be at once known from Cyphon by the incrassateel 

 posterior femora, and by the elongate spine at the apex of the 

 tibire : the antennse are shorter than in the latter genus, with the 

 third joint proportionably longer, and not greatly dissimilar in bulk 

 to the second. 



Sp. 1. hemisphserieus. Niger, pubescens, antennarum basi tibiisque pallidis. 



(Long. corp. 1^ — if lin.) 

 Ch. hemisphaarica. Linne. — Sc. hemisphfericus. Steph. Catal. 128. No. 1296. 



Black, pubescent; obsoletely punctulate, and slightly shining: elytra more 

 distinctly punctate, the pubescence changeable: body beneath pitchy-black: 

 femora also pitchy-black, with the apex testaceous; tibise and tarsi pale-tes- 

 taceous : base of the antennae pale, the apex black or fuscescent. 



Not uncommon in damp and marshy situations throughout the 

 metropolitan district ; on the banks of the Lea river I have fre- 

 quently observed it. " Windsor." — Mr. G. Waterhouse. " On 

 aquatic plants, not common (near Swansea)." — L. W. Dillwyn, 

 Esq. " Rushes, Battersea- fields." — Mr. Ingpen. " Aquatic 

 plants, Plaistow Marshes." — A. Cooper, Esq. 



Sp. 2. pallescens. Testaceo-pallidus, pubescens, antennis pedibusque pallidis. 



(Long. corp. if — 2 lin.) 

 Sc. pallescens. Steph. Catal. 128. No. 1297. 



Pale-testaceous, pubescent ; obscurely punctulate ; with the antennae and legs 

 pale, the hinder femora with a black patch in the middle. 



Larger than the foregoing species, from which it differs also in being more 

 pubescent as well as in colour, which is not that of an immature insect. 



Rare: I have hitherto seen but four or five examples. " Batter- 

 sea-fields and Spitchweek Park." — Dr. Leach. 



Genus CCXXXV.— Cyphon, PayJcul. 



Antenna: elongate, above half the length of the body, slender, filiform ; the basal 

 joint stout, cylindric; second shorter, globose ; third minute, nodose; there- 



