82 MADEIRAN COLEOPTERA. 
221. Agrilus Darwinii, n. sp. 
A, subcylindrico-clongatus angustus viridi-splendens ubique densis- 
sime rugulosus, prothorace versus angulos posticos unicostato, ely- 
tris apicem versus valde attenuatis dehiscentibus, antennis pedi- 
busque paulo obscurioribus. 
Long. corp. lin. 44. 
A, subcylindrical-elongate, narrow, slightly shining, of a clear me- 
tallic green (with a slightly golden tinge), and densely wrinkled 
(or rugulose) all over. Head much flattened in front, and longi- 
tudinally strigulose behind. Prothoraw rather wider in front than 
behind; its posterior margin (and therefore the anterior one of 
the elytra, which is closely applied to it) of a zigzag, or biangu- 
lated, form; very uneven, and with a bread interrupted dorsal 
channel; more or less transversely strigulose; and furnished 
towards each of its hinder angles with a short, and somewhat 
curved, costa. Scutellum with its front (elevated) portion less ru- 
gulose than the rest of the surface. Hlytra rather pinched-in a 
little before the middle, and each of them much attenuated to- 
wards their apex, where they are slightly divergent; beset with 
very minute posteriorly-directed points behind; deeply pitted on 
either side at the base (between the scutellum and either humeral 
angle), and with the rudiments of a small tubercle in the middle 
of each of the depressions; with the suture a good deal raised 
about its central region. Abdomen wide behind the middle of the 
elytra, where (as in most of the Agrili) the sides of it are a good 
deal visible from above. Zimés of a rather obscurer hue than 
(though equally shining with) the rest of the surface ; the antenne 
being nearly filiform, and internally serrated towards their apex. 
Captured by myself about a third of the way up the Ribeiro de 
Sao Jorge (in the north of Madeira proper) during August of 1855, 
I have dedicated the species to Charles Darwin, Esq., M.A., V.P.R.S., 
whose inquiries into the obscurer phenomena of geographical zoology 
have contributed more than those of any other man living to our 
knowledge, in the general questions of animal distribution. 
Fam. 25. THROSCIDA:. 
Genus 91. TRIXAGUS. 
Kugelann, in Schneid. Mag. v. 534 (1794). . 
222. Trixagus integer, n. sp. 
T. elongato-subellipticus postice attenuatus, rufo-brunneus, dense 
subflavescente-pubescens, fronte distincte bicostato, oculis magnis 
convexis integris, elytris leviter striatis, vix seriatim pilosis, inter- 
