132 MANDIBULATA.— COLEOPTERA. 



the suture, and towards the apex somewhat obsoletely punctate-striated : palpi 

 and antennae testaceous, the latter with a black club. 



Var. j3. With the elytra obsoletely clouded with dusky towards the lateral mar- 

 gins, near the apex. 



This species is the Hydrophilus bicolor of Paykul, v. i. p. 184; a name which 

 cannot be retained, Fabricius having previously applied it to a different 

 species of this genus ; I have therefore employed that by which it has been so 

 long known in this country, in preference to coining a new one, and thereby 

 unnecessarily add to the nomenclature. 



I have occasionally captured this insect during the spring in 

 Copenhagen-fields and near Hertford, and once at Ripley, but it 

 is not very abundant near London. " Wandsworth-common." — 

 Mr. Ingpen. " Near Norwich in April 1803, by Rev. W. Kirby." 

 Marshals MSS. " Southend, rather plentifully."— Rev. F. 

 W. Hope. " Lawrence Waltham." — Mr. S. Havson. 



Sp. 14. orbicularis. Ater-nitidus, supra creberrime punctulatus, elytris strid 



suturali unicd. (Long. corp. 2 — 2^ lin.) 

 Hy. orbicularis. Fabricius. — Steph. Cat at. p. 61. No. 615. 



Rather less than the preceding: nearly hemispherical: entirely of a deep 

 glossy-black ; thickly and regularly punctured throughout : head rather large: 

 thorax very convex, the lateral margins rounded and sometimes a little piceous : 

 elytra gibbous, with a single impressed stria near the suture, not reaching to 

 the base : body clothed beneath with a cinereous pubescence : legs deep pitchy- 

 black : tarsi rufescent : tibiae sometimes paler. 



The trophi of this species approximate rather closely to those of Cercyon. 



Occasionally found in ponds in the metropolitan district, and in 

 Norfolk. " In Kensington-gardens, and on Wandsworth-com- 

 mon. 1 ' — Mr. Ingpen. " Glanville's Wootton." — J. C. Dale, Esq. 

 " Southend."— Rev. F. W. Hope. 



Sp. 15. bipunctatus. Niger, thoracis lateribus pedibusque pallidis, elytris griseis 

 creberrime punctato-striatis, obscure nigro-pulverulentis. (Long. corp. 1^ — 

 l|lin.) 



Hy. bipunctatus. Fabricius.-— Steph. Catal. p. 61. No. 016. 



Black, finely punctulated : head with a small pale spot on each side before the 

 eyes: thorax with the lateral margins broadly pale-yellowish: scutellum 

 black : elytra pale griseous, very convex, rather strongly punctate-striated, the 

 striae composed of distinct fuscous impressions, and giving the appearance of 

 being irrorated with dusky or black ; the margins paler : legs entirely pale. 



A very common species in the neighbourhood of London; in 

 Norfolk, Suffolk, and I believe in most parts of the kingdom. 



