Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 49 
Gnathocerus mazxillosus? Fab. 
G. lineari-elongatus, pallide rufo-ferrugineus, subnitidus ; prothorace 
subconvexo, subquadrato, subtilissime punctulato; elytris punctato- 
striatis, antennis pedibusque rufo-testaceis. 
Mas mandibulis elongatis, angustis, curvatis, falcatis, porrectis ; fronte 
bituberculata, ad latera paulo subrecurvo-ampliata. 
Long. corp. lin. 14-1}. 
Hatitat Maderam, sub cortice arborum laxo in ipsa urbe Funcha- 
lensi, Junio ineunte a.p. 1859 a meipso repertus. ; 
Trogosita mazillosa? Fab. Syst. Eleuth. i. 155 (1801). 
G. rather smaller, narrower, and more linear than the G. cor- 
nutus, being of almost equal breadth throughout,—the prothorax 
being less expanded anteriorly, and the elytra with their sides 
more strictly parallel; also usually a shade paler than that spe- 
cies, but with much the same sculpture. Head of the females a 
little more rounded anteriorly than is the case in the G. cornutus, 
and rather less elevated and expanded before the eyes (which, 
unlike those of that insect, project perceptibly beyond this deve- 
loped lateral portion) ; head of the males likewise with this lateral 
portion scarcely more expanded than in the opposite sex (instead 
of immensely dilated, as in the cornutus), and with two central 
horn-like tubercles on the forehead (which are smaller and more 
medial than those of the cornutus, and not touching at their 
base the inner margin of the eye): also with the mandibles in 
the males greatly elongated, porrected, and incurved, but very 
much narrower and more sickle-shaped than those of the cor- 
nutus, and not so evidently re-curved towards their apex. Pro- 
thorax squarer than in the G. cornutus, beg less expanded in 
front, and therefore straighter at the sides, and with the hinder 
angles less obtuse. i/ytra with the sides perfectly parallel, 
instead of a trifle diverging posteriorly as in that species, and 
somewhat more deeply striated. Limbs (particularly the an- 
tenn) usually a shade paler than those of the cornutus. 
Several specimens of the present Gnathocerus were captured 
by myself (and subsequently, in the same locality, by Mr. Be- 
wicke) beneath the dead, loosely attached bark of the Plane-trees 
in the Praca da Rainha, in Funchal, at the beginning of June 
1859. Like the G. cornutus, it has doubtless been imported 
into the island, but seems to have naturalized itself even more 
completely than that species. Judging from two short observa- 
tions in Lacordaire’s recent volume on the Genera of the Hetero- 
mera, in the ‘ Suites 4 Buffon’ (“‘ Les mandibules du male sont 
beaucoup plus gréles que chez la cornuta ;” and, “une seule es- 
péce est décrite, la Trogosita mazillosa, Fab., Syst. Eleuth. i. 155,” 
besides the cornutus), I conclude that it is in all probability co- 
incident with the Fabrician 7. mazillosa, and have cited it 
Ann. & Mag. N. Hist. Ser. 3. Vol. vi. 4 
