j-VWf 
224 . 
HETEROCERUS OBSOLETUS. 
Order Coleoptera. Fam. Parnidse Leach. Byrrhii Lat . 
Type of the Genus Heterocerus marginatus Bose. 
Heterocerus Bose., Fab., Lat., Marsh., Panz.- — Apate Fab. — Der- 
mestes Thunb. 
Antennae inserted close to the eyes at the base of the mandibles, 
short, pubescent, 11-jointed, basal and 2nd joints producing 
very long hairs internally, the former joint very large, obtrigo- 
nate, the latter large cup-shaped, 3rd and 4th minute, the 6 
following large, cup-shaped, (giving a serrated appearance) the 
11th orbicular (6). 
Labrum very rough and hairy, semiorbicular, slightly notched ( 1 ) . 
Mandibles rather long and bent, with a tooth and some long 
bristles on the external side, tridentate at the apex and furnished 
with a long membranous lobe on the internal side, ciliated and 
notched at the middle (2). 
Maxillae very long and slender, rigid and pilose, bilobed, internal 
lobe short obtuse, external rhomboidal, both ciliated with bristly 
spines. Palpi triarticulate, 1st and 2nd joints of nearly equal 
size, subturbinate, 3rd a little larger securiform (3). 
Mentum large, subcordate, pilose, emarginate, forming 2 lobes. 
Labium obcordate elongate, ciliated. Palpi approximating, 
arising near the middle of the lip, short clothed with very long 
hairs, triarticulate, basal joint small, slender, 2nd and 3rd ro- 
bust, the latter conical truncate (4). 
Head elongated , broad at the base, narrow before. Eyes small, remote. 
Thorax transverse subovate. Scutellum minute. Elytra ovate, as 
broad as the thorax. Wings very ample. Tibiae broad compressed, 
serrated with long spines on the external margin and at the apex. 
Tarsi clothed with very long hair beneath, 4-jointed, basal joint long , 
2nd and 3rd small, 4th the length of the ls£, clavate. Claws long 
and slender (5, afore leg). 
Obs. The dissections are from H. obsoletus Nob. 
Obsoletus Leach's MSS. 
Piceous, shining, thickly punctured and very pubescent. Man- 
dibles castaneous. Thorax with a ferruginous spot on each side 
behind the eyes. Elytra, each with an ochraceous spot at the 
base, 3 small ones near the middle and 4 larger towards the 
apex, spines of tibiae and tarsi castaneous at the apex. 
In the Author's and other Cabinets. 
