34 LAMELLICORNIA. { Plagiogonus, 
PLAGIOGONUWS, Malsant. 
This genus contains three or four species from Europe, Algeria, and 
Syria; they differ from Aphodius in having the sutural angles of the 
elytra produced into a tooth at apex, and perhaps ought nut to be 
separated from that genus, as the differences are very slight. 
P. arenarius, Ol. (rhododactylus, Marsh.). The smallest of our 
species belonging to the Aphodiinu ; rather elongate, moderately convex, 
very shining, black or pitchy black, oecasionally brownish; antenn 
and palpi reddish, the former with a large blackish or brownish club ; 
head large, very finely punctured, elypeus 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 strie which 
become much stronger and sulcate towards apex, interstices sparingly 
and very finely punctured ; legs reddish-brown or pitchy. L. 2-25 mm. 
In the male the clypeus is almost even and obsoletely punctured in 
middle ; in the female it is evenly punetured and somewhat raised in 
middle. 
Chalky and sandy distriets ; in dung; occasionally by sweeping ; local; Chatham, 
Caterham ; Amberley ; Riddlesdown ; Shipley, near Horsham ; 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. 
IJ. Thorax shiny, rather diffusely and not strongly punc- 
tured; elytra yellow with the second and fourth 
interstices marked with black . sn ae homaered hc 
II. Thorax dull, strongly, very closely, and more or less 
rugosely punctured ; elytra pitchy black or reddish with 
round yellowish-red spots se ae vorebe Murky Preise 
III. Thorax rather shiny, somewhat closely but not 
rugosely and only moderately strongly punctured ; elytra 
unicolorous reddish. 2. « « - + © © = + . . H. vittosus, Gyil. 
iH. sus, Herbst. Somewhat elongate, subparallel, pubescent ; head 
and thorax reddish-brown, the latter with margins lighter; the an- 
terior margin of the elypeus 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 
H. sus, Herbst. 
H, TESTUDINARIUS, F’. 
