10 ADEPHAGA. 



I appended a note to Mr. Newbery's article as follows : '• In my book 

 I have allowed B. riparium (? = lunulatwm, Fourc.) to stand as a 

 separate species, on the ground cf the total absence of the 7th stria of 

 the elytra, but I felt considerable doubt in the matter, and believe it 

 to be only a form of B. higuttatum. As for B. iricolor, the characters 

 assigned to it by Bedel are certainly not enough to give it specific 

 rank ; they are purely comparative and very slight, and at most the 

 insect appears to be a local variety found, as above stated, near 

 brackish water ; forms found in such localities are often somewhat 

 different from the type. It is a pity, too, to further confuse the 

 nomenclature and, in any case, to revive B. lunulatum is to cause a 

 confusion with B. lunatum that is far best avoided, if possible ; 

 several of the groups of Bembidium are quite confused enough already, 

 Beare and Donisthorpe in their catalogue (1904) retain B. iricolor, as 

 separate from B. riparium, but have refrained from reinstating the 

 name of B. ht^iulatum for the latter species." 



Since the above was written Mr. Newbery has discovered that the 

 disc of the thorax in B. iricolor and B. lunulatimi is not alutaceous, 

 and has kindly sent me the following table of all the species of the 

 Fhilochthus group of the genus Bembidium. The head is alutaceous in 

 all the species, most conspicuously so in B. cenetim, Germ., and least 

 conspicuously in B. bigiUtatum, Fab. 



I. Disc of thorax alutaceous : 



i. 7th stria of elytra indicated by about 

 ten or more punctures ; first joint of 

 antennae, and the legs, red-yellow. L. 



3J-4 mm B. biguttatum, F. 



ii. 7th stria of elytra wanting, or (rarely) 

 indicated by two or three punctures near 

 the base, 



1. Legs and antennae black, or very 

 neax'ly so ; size larger ; apical elytral 

 spot usually wanting (at most in- 

 distinct). L. 4 mm. . . . B. ^neum, Germ. 



2. Legs and first joint of antennae (at 

 least at base) reddish ; smaller 

 species. L. 2|-3|- mm. 



A. Contour of elytra more parallel, 

 with shoulders more marked ; 

 apical spot nearly always present; 



colour more aeneous . . . B. guttula, F. 



B. Contour of elytra more ovate 

 and convex, Avith the shouldei-s 

 nearly effaced ; apical spot 

 usually absent ; colour black or 



brown (? immature), not aeneous B. Mannerheimi, Sahl. 



