44 LAMKLLICORNIA. [Geotrv] . 



as in the latter species the abdomen is entirely punctured and pubescent ; 

 it is therefore plainly intermediate between the two species; according to 

 Marsham the species is most like G. spiniyer, but has four excavated 

 punctures on the thorax, the disc of which is more remotely and tin- 

 sides more thickly punctured; the scutellum is violet, the margins of 

 the sulcate elytra and thorax blackish-blue; the posterior femora are 

 furnished with one or two small teeth, and the anterior tibiae with six 

 teeth; the length is 14 mm. Mr. Bye confesses that he is unable to 

 determine the species from any of his specimens, nor have I heard of any 

 other person who has been able to do so; the question must therefore 

 still be left in abeyance. Dr. Sharp in his Catalogue of Scottish 

 Coleoptera mentions G. fuveatus as occurring throughout Scotland, but he 

 omits G. spiniger altogether, which appears to be the most common and 

 widely distributed species of the genus; he obviously therefore regards 

 them as synonymous.) 



G. mutator. Marsh. Closely allied to the preceding in size and 

 general appearance, but at once distinguished by having nine striae 

 instead of seven between the suture and humeral prominence of the 

 elytra; the upper surface, as a rule, appears to be slightly violaceous, but 

 is sometimes bluish or greenish as in the preceding species; the under- 

 side is metallic, sparingly punctured and pubescent, especially in middle; 

 the mandibles are strongly rounded externally and slightly sinuate at 

 apex; the thorax in both sexes is finely and diffusely punctured at sides 

 and smooth in the middle, and in the middle is furnished with a fine 

 central line, which is abbreviated in front, and is marked with a few 

 punctures or almost impunctate ; posterior tibiae with three carinae on 

 their outer side; the general form is somewhat more oblong than in the 

 two preceding species. L. 15-22 mm. 



Male with the posterior femora near base, and the trochanters at apex, 

 armed with a sharp tooth ; anterior tibiae with a keel underneath which 

 is serrate and terminated in two teeth at apex. 



In dung 1 ; generally distributed and more or less common in the London district 

 and the south of England; Burnham, Somerset; Bath; Bristol; Swansea; Tcwkes.- 

 bury ; Needwood Forest, Stafford shire ; I do not, however, know of any locality 

 further north than those here mentioned. 



G. sylvaticus, Panz. Smaller and rounder than either of the pre- 

 ceding species, upper surface without pubescence, of a shining blue-black 

 colour with the margins more distinctly blue, under-side clothed with 

 blackish pubescence, shilling blue or violet-blue, closely punctured ; 

 head rugose with a distinct prominence in centre, antennae reddish, with 

 the exception of the first joint, which is dark; thorax as broad as elytra, 

 broadest behind middle, narrowed in front, diffusely punctured on disc, 

 more closely at sides, with a trace of a longitudinal furrow at base ; 

 scutellum with a few coarse punctures arranged longitudinally in middle; 

 elytra with feeble and obsoletely punctured striae, the interstices with 



