British Species of Agathidium. 451 
This insect cannot be confounded with 4. levigatum, which is 
the only other British species without any sutural stria; the well 
marked humeral angles of the elytra (more nearly rectangular 
than in most of its allies) of 4. marginatum will at once distinguish 
it from that species. 
Rare ; occurs very sparingly both in the North and South. 
Found once by Mr. F. Smith in some numbers in Charlton pit. 
10. Agathidium nigrinum, Sturm. 
Pitchy black, with the antennz, except the club, and the legs, a 
little lighter; head tumid behind the eyes, very closely and 
extremely finely punctured; thorax very transverse, very closely 
and obsoletely punctured, not so wide as the elytra; these with 
their humeral angles nearly right angles, punctuation rather fine 
and not close, sutural stria well marked and reaching beyond the 
middle. @ with the anterior and middle tarsi a little dilated, and 
a very minute bunch of hairs on the metasternum. 
Long. 14—14 lin. 
This fine insect is distinguished from all our other indigenous 
speciés, except 4. rhinoceros, by its head being tumid behind the 
eyes; this character, together with the well marked nearly rect- 
angular humeral angles of the elytra, at once separates it from 
A. atrum, which is the only other species that ever equals it in 
size. 
Rare ; found sometimes in sandpits in the south, at fir stumps 
in Scotland, and is also taken by Mr. Bold in Northumberland. 
11. Agathidium rhinoceros, nov. sp. 
Globoso-ovatum, nigro-piceum; antennis articulis 4—8 intus 
subproductis ; capite prothoraceque parce punctatis, hoc 
Jateribus antrorsum angustatis; elytris punctulatis, humeris 
fere rectis; stria suturali medium attingente. 
é mandibula sinistra vel cornuta, vel producta, vel mutica ; 
tarsis anterioribus et intermediis dilatatis ; metasterno fasci- 
culo pilorum inconspicuo instructo. 
2 tarsis 5, 4, 4. 
Long. 1} lin. 
Var.—Piceo-rufum. 
Pitchy black, with the legs and scape of the antennz lighter ; 
head with the temples tumid behind the eyes and with two broad 
shallow foveze behind the mandibles, together with the thorax 
