HYDROPHILID^. 29 



Not a common species. Lundy Island (Joy and Tomlin); Cambridge 

 (Gorham) ; North Wales (W. E. Sharp). This species is not mentioned 

 in the catalogue of Heyden, Reitter, and Weise, 1906. 



The synonymy of L. sinuatus, Mots., is there given as follows : 



L. sinuatus, Mots, 

 minor, Rott. 

 albescens, Rott. 

 neapolitanus, Rott. 

 obscuratus. Rey. 

 subregulari?, Rey. 



It is certainly not the L. sinuatus of Motschulsky, but whether it 

 may be one of the species here given as synonyms I am not prepared 

 to say. 



LIMNEBIUS, Leach. 



Mr. F, Balfour Browne has kindly sent me the following note as to 

 the distinctive characters of L. truncatellus, Thunb., and L. papposus, 

 Muls., which have always been a crux to Coleopterists. " The males," 

 he says, " are, of course, easily separated by the form of the maxillary 

 palpi, ifec, but there is an excellent character in the mesosternal process 

 (projecting between the coxae and the second pair of legs), which is 

 broad in L. tnmcatellus and narrow in L. ^japposus in both sexes." 



HELOPHORUS, Fabricius. 

 Mr. James Edwards (Ent. Mo. Mag. xliv., Ser. 2, xix. (1908) 218) 

 gives a valuable table for distinguishing the British species of this 

 difficult genus. I feel considerable doubt as to the specific value of 

 certain of the species (e.g., ff. cequalis, Thoms., II. crenatus, Rey., and H. 

 strigifrons, Thoms.), but much remains yet to be cleared up with 

 regard to the genus, and I therefore give the table practically as 

 published, with one or two alterations.* 



I. Elytra with a scutellary stria, 

 i. Elytra black ; 3rd, 5th, and 7th interstices 



tubercalate ...... H. tuberculatus, Gyll. 



ii. Interstices not tuberculate. 

 1. Alternate interstices of elytra cariniform 

 and setose. 



A. Humeral angles of elytra almost acute H. rufipes, Bosc. 



(rugosus, 01.) 



B. Humeral angles of elytra rounded off. 

 a. Intermediate farrows on the thorax 



angulated near the middle . . H. porculus, Bedel. 



* Mr. Edwards' table is numbered at the sides and does not fit at the end : it 

 should be 19 (84) and 20 (31) instead of 19 (31) and 20 (34). I have translated the 

 whole into the straightforward table which I always use, ns it always appears to 

 me to be so much simpler and easier to work from. — W. W. F. 



