170 MADEIRAN COLEOPTERA. 
P. narrow, and rufo-testaceous. Head, prothorax, and elytra opake, 
and densely clothed with a short, decumbent, cinereous pubes- 
cence: the first oval, about as broad as the prothorax, and a little 
punctured and subgranulose behind: the second minutely and 
obscurely punctulated ; and somewhat narrowed, as well as obso- 
letely channeled, posteriorly : the last exceedingly short, and still 
more obsoletely punctured. Abdomen a little widened behind, and 
more shining than the rest of the surface, being less densely 
covered with pubescence; more evidently punctured, and rough- 
ened, than the head and prothorax ; and more or less darkened, 
especially in the middle, the apex and base being gradually paler. 
Limbs testaceous. 
Two specimens of this insect were detected by myself in the island 
of Porto Santo,—burrowing into the sand-hills behind the southern 
beach, at the roots of Arundo donax,—during the spring of 1855. 
They have been carefully examined by Mr. Janson, who believes 
them to be identical with the Myrmedonia nigriventris of Chevrolat ; 
and I am indebted to him for the opportunity of comparing them 
with examples from Berwickshire, from Swinemiinde (on the shores 
of the Baltic), and from France,—with which they appear, to me 
also, unquestionably to agree. It would seem however to be a natu- 
rally variable species, as regards size and the greater or less intensity 
of its darker parts; and, judging from the representatives now 
before me, it is a trifle paler (and perhaps smaller) in Porto Santo 
than in our own country. 
Genus 206, TACHYUSA. 
Erichson, Kaf. der Mark Brand. i. 307 (1837). 
483. Tachyusa raptoria. 
Tachyusa raptoria, Woll., Ins, Mad, 542 (1854). 
Inhabits Madeira proper, occurring amongst wet shingle along the 
edges of the rivers and streams. Rare. 
Genus 207. CHILOPORA. 
Kraatz, Nat. der Ins. Deutsch. ii. 146 (1856). 
Chilopora has been lately separated from Calodera by Kraatz,—to 
include a few species which dwell more peculiarly amongst shingle at 
the edges of streams, and in which the antennz are slenderer, and 
the head more constricted behind, than in the typical Calodere. 
Their abdomen, also, is as closely and minutely punctulated as the 
rest of their surface; their inner maxillary lobe has only a few, rather 
