34 LAMELLicoENfA. [Plagioyonue. 



PXiAGXOOONUS, Mulsant. 



This genus contains three or four species from Europe, Algeria, and 

 Syria ; they differ from Aphodim in having the sutural angles of the 

 elytra produced into a tooth at apex, and perhaps ought not to be 

 separated from that genus, as the differences are very slight. 



P. arenarius, Ol. (rltmlodadylus, Marsh.). The smallest of our 

 species belonging to the Aphodiin<i ; rather elongate, moderately convex, 

 very shining, black or pitcliy Mack, occasionally brownish ; antennae 

 and palpi reddish, the former with a large blackish or brownish club; 

 head large, very finely punctured, clypeus large separated from head by 

 a very fine and distinct line ; thorax slightly narrower than elytra, 

 almost straight at sides, with the posterior angles emarginate, rather 

 sparingly and strongly punctured, with an intermixture of finer punc- 

 tures ; elytra usually a little lighter than thorax, somewhat widened 

 behind middle, sutural angles toothed at apex, with fine striae which 

 become much stronger and sulcate towards apex, interstices sparingly 

 and very finely punctured ; legs reddish-brown or pitchy. L. 2-2^ mm. 



In the male the clypeus is almost even and obsoletely punctured in 

 middle ; in the female it is evenly punctured and somewhat raised in 

 middle. 



Chalky and sandy districts ; in dung; occasionally by sweeping; local; Chatham, 

 Caterham ; Amberley ; Riddlesdown ; Shipley, near Horsbam ; Eastbourne; Swansea; 

 Newmarket Heath. It is sometimes rather plentiful where it occurs. 



HEPTAULACUS, Mulsant. 



The members of this genus are often included under the genus 

 Oxyomus, which in its widest sense includes about a dozen species, of 

 which six are European, and the remainder have been recorded from 

 South Africa, Tahiti, and Chili ; they are easily known from Aphodius 

 by having the interstices of the elytra more or less carinate. 



I. Thorax shiny, rather diffusely and not strongly punc- 

 tured ; elytra yellow with the second and fourth 



interstices marked with black H. 8U8, Herlst. 



II. Thorax dull, strongly, very closely, nnd more or less 

 rugosely pnnctured ; elytra pitchy black or reddish with 



round yellowish-red spots H. TBBTUDINABIUS, F. 



III. Thorax rather shiny, somewhat closely but not 

 rugosely and only moderately strongly punctured ; elytra 



unicolorous reddish H. Vlliosus, Ch/ll. 



H. sua, Herbst. Somewhat elongate, subparallel, pubescent ; head 

 and thorax reddish-brown, the latter with margins lighter ; the an- 

 terior margin of the clypeus is also broadly lighter ; elytra obscurely 

 testaceous with the second and fourth interstices mottled with black ; 

 head sparingly punctured, antenna and palpi reddish-yellow; thorax 

 a little broader than long, diffusely and not strongly punctured, 

 more diffusely on disc, more thickly however in female than in 



