240 IIYDROPIIILTD.E. \_IIehqihonnt. 



As the great confusion that lias arisen with regard to these small 

 species of Helophori is in great measure due to the indi- criminate way 

 in Avhich the names grisetis and granularis have been applied now to 

 one species and now to another, they ha'^'e been entirely dropped, it being 

 cpiite impossible to determine which species have the prior claim to Ite 

 called by these names. 



K. arvernicus, IMuls. One of our most distinct species ; head and 

 tliorax rather obscurely metallic, greenish or reddish ; antenna? and pidpi 

 reddish, last joint of latter dilated, short oval ; thorax with sides rounded 

 in front, contracted and sinuate behind, entirely granulated, rather dull ; 

 elytra rather short in proportion to thorax, usually dark brown, but with 

 the darker markings distinctly traceable, Avith strong and very strongly 

 punctured strise ; interstices convex, alternate ones somewhat raised ; 

 legs brownish testaceous. L. 3 mm. 



Local ; a nortliern and mountainous species as a rule : once taken by Dr. Power at 

 Horsell (Surrey) ; Snowdon ; banks of the Bollin, Cheshire ; Scothind, local, Lowhinds, 

 on sandy banks by the sides of rivers, Tweed, Solway, Clyde, Tay, Dee, and Moray 

 districts. 



H. nanus, Sturm. Oblong-oval ; head and thorax bronze with 

 reddish or greenish reflection which is often absent, antennae and palpi 

 testaceous, apical half of last joint of latter usually dusky ; thorax with 

 almost straight, even, and regular furrows, the spaces between being 

 almost smooth and shining, that between the last furrow and the margin 

 being the most roughened ; elytra darker or lighter brown with bronze 

 reflection, with strong punctured strise, interstices rather narrow and 

 somewhat depressed ; underside pubescent, black with a greenish metallic 

 tinge ; legs testaceous, tarsi somewhat darker ; the sculpture of the 

 thorax ancl the form of the frontal furrows will at once distinguish this 

 species from any other : it is said to have only eight joints to the 

 antennae instead of nine, the regular number, but this fact does not 

 appear to have been satisfactorily established ; if it is the case, the 

 species must be formed into a new genus. L. 2-3 j nnn. 



Very local ; taken abundantly by Dr. Power at Lee, Kent ; Guestlins;, near 

 Hastings (Butler) ; it has also occurred in Horning Feu: the species varies very 

 much in size. 



HYDROCHINA. 



The members of this tribe have the clypeus truncate and not eraargi- 

 nate, and by this are distinguished from the Spercheina ; besides the 

 points before mentioned under Helnphonis, they differ from that genus in 

 having the abdomen with six or seven segments instead of five, the last 

 being often membranous ; the short second joint of the posterior tarsi 

 will also at once distinguish them ; all the species belonging to the tribe 

 are very small : an account of our three British genera {Hydroclms, 

 Odliehius, and Hyilranni.) will be found' given by myself in tlie Ento- 

 mologist for July, 1881. I have since then come to the conclusion that 



