GyrinuK] adepuaga. '21') 



Dcutsch. DytisciJcTe, &c., p.. HO) makes no mention of any punctuation 

 of the interstices of G. caspius, whereas (p. 141) he expressly says of 

 G. colymhas that the interstices in both sexes are very finely, but under 

 a strong magnifying power distinctly punctured. I have before me a 

 specimen of I)r. Sharp's from Stony Stratford labelled Gi/rinus cohjmbiis 

 Jide Rt'ijimhart = casjiius mihi : as the interstices are evidently, although 

 very finely, punctured, this is probably the true G. coJijmhus, Er. ; there 

 remains, however, the third form with the interstices covered with distinct 

 striiB : as will be seen by the description above, M. Regimbart considers 

 this a mere variety of casjj'ais ; Dr. Sharp in his last catalogue gives it 

 as V. coli/mhus, Shp., of roh/mhii.'^, Er., and considers easpius as synony- 

 mous Avith colijmbus. The striolate form appears, however, to be very 

 distinct, in fact considerably more distinct than several other of the 

 species ; I propose therefore to name it G. sfriolatus; the following is 

 the description : — 



Ovate, not very convex, above bluish black, slightly shining, the elytra 

 punctate-striate, the internal striae rather finer than the outer ; the inter- 

 stices of elytra and the upper surface of head and thorax are closely covered 

 with short transverse strite, which are very distinct ; underside lilack, 

 margins of thorax and elytra and legs (including the claws), breast, and 

 extremity of abdomen rufo testaceous. Long. 6-7, lat. 3^-4 mm. 



The insect in size and form resembles G. marimis, but is distinguished 

 from that species by the red reflexed margins of elytra, red claws, and 

 peculiar sculpture. 



Six specimens originally in Mr. Crotch's collection, locality unknown. 



If any weight at all is to be allowed to sculpture, I feel convinced 

 that this species must be allowed to stand ; if, however, it should still 

 be regarded as a variety, I think that the variety requires a distinct 

 name. 



It seems doubtful whether the type caspius form is found in Britain. 



G-. natator, Scop. Ovate, convex, upper side bluish-black with the 

 sides brassy ; elytra punctate-striate, the internal stria?, much fainter 

 than the external ; under side black, with the margins of the elytra and 

 the legs red, or reddish testaceous ; sometimes the breast and apex of 

 abdomen are red (var. suhstriatus, Steph.). Long. 5-6o-, lat. 2f-3i 

 mm. 



Of this species there are two well-marked forms, which have been 

 regarded by some authors as distinct; they are, however, connected by 

 intminediate forms possessing characters of each ; they may be described 

 as follows : — 



L G. mi'Tfjus, Ahr. Droad, not so much narrowed before and Itehind, 

 the inner striie evidently finer than tlie outer, especially towards the 

 suture, but always distinct and perceptible for their wliole length. 



Very couunou in England I'sppci.illy iu tho sontli, but ilix-s not occur in Scotland. 



