HYDROPHILID^. 



27 



rated by a space less than 



the diameter of one of them 



h. Rows of punctures on the 



elytra regular ; male with 



the " goggles " on the front 



of the labrum distinctly 



smaller and more widely 



separated .... 



B. Form longer oblong ovate ; rows 



of punctures on the elytra more 



or less irregular; colour, as a 



rule, lighter .... 



IL 



2, Size smaller (2J-2| mm.) ; 

 rows of pvinctures on elytra 

 regular ; apex of elytra with 

 two very distinct white spots 

 (these are present, but never so 

 well marked, in other species) . 



Thorax alutaceous between the larger 

 punctures. 



i. Size larger {o^ mm.) ; punctuation 

 of elytra more or less confused 



ii. Size smaller {2h mm.) ; punctua- 

 tion of elytra regular . 



L, YTENENSis, Sharp. 



L. REGULARIS, Rey. 



L. OBLONGUS, Gorham. 

 = OBSCURATUS, Bey., l. 



= SINlfATUS, Mots., L. 



L. BiGUTTATUS, Gerh. 

 {bvpvnctatiis, Bedel, Tiec F. 



L. ALUTACEus, Tlioms. 



L. MIXUTUS, L. 



L. purpurascens, Newbery, Ent. Mo. Mag. xlix. (2 Ser. xix.) 

 1908, 30. Smaller on the average than L. nigriceps, Thoms,, from which 

 it may be distinguished by its very distinct colour ; the thorax and head 

 are almost entirely brown-red, the side margins of the former being 

 only narrowly testaceous, the testaceous colour being only narrowly and 

 linearly continued towards the scutellum ; the whole insect has a more 

 or less distinct and usually well-marked coppery-purple or coppery -green 

 reflection, which is quite absent in the type form ; the " goggles " on 

 the labrum are not large and somewhat distant, and are, perhaps, a 

 little more marked than in L. nigriceps : they do not, however, differ 

 very materially. L. 3-3^ mm. 



Taken in abundance by Mr. Philip de la Garde in May 1906, 

 crowding in large numbers among the slimy ooze where water had 

 trickled down the sandy cliffs on the north side of the River Teign at 

 Shaldon, Devon ; Mr. Champion has taken it in the same locality, and 

 Mr. Keys has found it near Plymouth. 



The species seems a little doubtful, and at first I preferred to follow 

 the opinion of Captain Deville, that it is a new variety of L. nigriceps, 

 analogous to a variety of L. ohlongus {sinuatus) which Rey has described 



