ELMIS 
r h It 50 
294 . 
VOLCKMARI. 
Order Coleoptera. Fam. Elmidse Curt . 
Type of the Genus , Dytiscus Volckmari Panz. 
Elmis Lat., Steph. — Limnius Mill., Meg., Gyl., Lea., Sam. — Dytis- 
cus Panz. — Chrysomela Mar. 
Antennce inserted before the eyes on each side the head, as long 
as the thorax, slightly clavate, 11 -jointed, 1st and 2nd joints 
rather stout, the 7 following slender, obovate-truncate, the 10th 
and 11th more robust, the former obovate-truncate, the latter 
twice as long subovate, pubescent at the apex (6). 
Lahrum exserted, large, pilose, transverse-ovate, thickly ci- 
liated (1). 
Mandibles, bent, obtuse and bifid at the apex, internal margin 
very much excavated and furnished with a broad membrane (2). 
Maxillce small, terminated by a rounded lobe, densely clothed 
round the apex with long curved hairs. Palpi ; internal short, 
biarticulate, terminal joint curved and pilose : external 4-jointed, 
basal joint minute, 2nd obovate-truncate, 3rd somewhat cup- 
shaped, 4th the longest, slightly curved and terminated by a ve- 
sicle (3). 
Mentum subquadrate, the sides convex. Labium narrowed at its 
base, but very much dilated and ciliated anteriorly. Palpi at- 
tached to scapes at the base of the Lip and scarcely extending 
beyond it, 3-jointed, basal joint small, 2nd rather larger, 3rd the 
largest, oval and terminated by a vesicle (4). 
Head subglobose, sunk to the Eyes which are small, orbicular, lateral 
and not prominent. Thorax convex, sides generally with a broad 
margin, arched anteriorly and sinuated near the angles which are 
acute, somewhat lobed at the Scutellum which is small. Elytra con- 
vex. Wings long. Thighs rather robust. Tibiae simple and slender. 
Tarsi as long as the tibice, 5 -jointed, basal joint longer than the 3 
following which are subovate-truncate, 5th very long robust and cla- 
vate. Claws simple acute (5). 
Volckmari Panz., Lat. — buprestoides Marsh. 
Black smooth and shining, minutely punctured. Antennae tes- 
taceous, fuscous at the apex. Thorax with broad slightly elevated 
lateral margins, leaving a very convex and ovate-truncate space 
in the centre. Elytra considerably broader than the thorax, with 
a slight cupreous tinge, sparingly clothed with short pubescence, 
each having 8 strongly punctured striae : tibiae somewhat casta- 
neous, and the tarsi castaneous. 
In the Author's and other Cabinets. 
