68 COLEOPTERA. 



I have remarked that the apical joint of the antennae is 

 longer in mmntimus than in testaceus. 



44. Philhydrus nigricans, Zett. Ins. Lapp. 123, 7 {Sy- 



drophilus) ; Thorns. Skand. Col. ii. 97, 4. 

 frontalis, Erichs. Col. Mar. i, 210, 6 ; G. R. Crotch, 

 Zool. 8611 (1863). 



Mr. Crotch briefly mentions that he has identified this 

 species as British from types sent to him by Mr. Thomson. 

 I have also made it out from Thomson's work (loc. cit.), 

 having taken it in brackish water at Gravesend. 



It is almost the same size as P. melanocephalus, but 

 shorter and more convex than that species, with the punc- 

 tuation of the elytra generally stronger, but without any 

 rows of larger, irregular punctures. The palpi are entirely 

 rufous (not fuscous at the apex of the last joint, as in mela- 

 nocephalus), and the femora are also rufous, but fuscous on 

 the upper side. 



45. Philhydrus ovalis, Thoms. Ofvers. af Vet. Ac. Forh. 



1853, 52.6, id. Skand. Col. ii. 97,6; G. R. Crotch, 

 Zool. 8611 (1863). 



Mr. Crotch mentions that he has identified this species as 

 British from types sent to him by Thomson. 



I find from the latter's description (loc. cit.) that the 

 insect in question is closely allied to marginellus, Fab., but 

 larger and more obtuse, more strongly punctured and more 

 obscure in colour than that species, with the palpi entirely 

 red, the femora and tibiae black and the tarsi rufescent. 



According to my experience it is a much more common 

 insect than P. marginellus. 



