Ayriofes.] SBRRICOHNIA. 107 



I. Form hroader ; thorax with posterior angles not or only 



obscurely lighter than the re-t of the upper surface, 

 i. Posterior coxa; slightly dilated internally ; punctuation 



of interstices of elytra feebler. 

 1. Elytra unicolorous. 



A . Size smaller ; thorax longer ; antenna shorter and 



more slender A. SPCTATOH, L. 



B. Size larger; thorax shorter; antennae longer and 



stouter A. onset* KITS, L. 



"2. Klytra with the interstices alternately lighter and 



thicker A. LINKATUS, L. 



ii. Posterior coxae rather strongly dilated internally; 

 upper surface unicolorous, almost black; punctuation 

 of interstices of elytra stronger A. SORDIDUS, III. 



II. Form narrow and slender; Thorax with posterior angles 

 yellowish-red ; elytra light brown with suture blackish, 

 sometimes unicolorous. 



i. Size larger; punctuation of thorax finer and more 



diffuse; posterior angles of thorax ridged A. BOBRINUS, Kiet. 



ii. Size smaller ; punctuation of thorax coarser and 



closer; posterior angles of thorax not ridged .... A. PAI.LIDULUS, III. 



A. sputator, L. (rufulu-s, Lac.; graminicola, Redt.). Oblong, 

 convex, fuscous black or dark brown, sometimes castaneous, rather 

 thickly clothed with greyish pubescence ; head thickly punctured, 

 ant'-nnae entirely yellow or brownish-yellow, second joint considerably 

 longer than third, and longer than fourth ; thorax longer than broad, 

 convex, thickly and distinctly punctured, posterior angles considerably 

 produced, rather sharp, plainly keeled ; scutellum large, situated in a 

 deep basal depression of elytra ; elytra with sides very slightly rounded, 

 and very gradually contracted towards apex, broadest in middle, deeply 

 but finely striated, interstices flat, finely punctured and transversely 

 rugose ; legs brownish-yellow with femora often darker. L. 5-6 mm. 



Under stones ; at roots of grass ; in moss, flood refuse, &c. ; common and generally 

 distributed throughout the south of England and the Midland districts; not so 

 common further north ; Scotland, rare, Solway ami Tweed districts. 



A. obscurus, L. (varialrilis, F.). Larger, more convex and less 

 parallel-sided than the preceding, with the thorax shorter and duller and 

 more thickly and strongly punctured ; colour fuscous, or brown, 

 unicolorous, or with the thorax dark and the elytra lighter or darker 

 brown; antenna? longer and stouter than \nA.sputatur; thorax very 

 strongly and thickly punctured, subtransveree, posterior angles sharp, 

 moderately or indistinctly keeled ; elytra with sides rounded, dilated 

 about middle, and rather strongly narrowed at apex, with fine punctured 

 striae, ami broad and flat finely punctured and transversely rugose 

 interstices ; under-side dark brown or black; legs brownish-yellow or 

 i-t.-ddish with femora darker. L. 8-9 mm. 



l'iiW stones; in moss, Ac.; generally distributed and common throughout the 

 kingdom. 



