MADEIRAN COLEOPTERA, 67 
184. Metophthalmus asperatus. 
Metophthalmus asperatus, Woll., Ins. Mad. 193. tab. iv. f. 4 (1854). 
Inhabits the damp sylvan districts of Madeira proper, occurring 
beneath bark and in dry rotten wood at intermediate elevations. Up 
to the publication of the Insecta Maderensia it was unique, but on 
the 22nd of August 1855 I detected it in abundance amongst the 
dead, tinder-like wood of an old Til-tree at the Ribeiro Frio, where 
it was apparently feeding upon a minute Mould, or Thallus (the 
Rhinotrichum Bloxhami, Berk.), with the particles of which it was 
(especially on its under-side) more or less densely powdered. I am 
also informed by Mr. Bewicke that he has captured it at the Mount, 
above Funchal. 
Genus 70. MONOTOMA. 
Herbst, Natursyst. v. (1793). 
This genus (so universal throughout Europe) is an addition to our 
fauna since the publication of the Jnsecta Maderensia, the two fol- 
lowing species having been detected by myself during my last sojourn 
in these islands, in 1855. It may be readily known by the robust 
limbs, and long, narrow and laterally crenulated prothoraces, and 
the posteriorly truncated elytra of the (small and rather acuminated) 
insects which unite in composing it,—the antennee of which are only 
10-articulate (the terminal joint being apparently absorbed within 
the apex of their one-jointed club), and the tarsi tetramerous. Re- 
garding their affinities, the Monotome would seem to be connective 
between the present family and the Colydiadw,—agreeing with the 
former in their minute size and general contour, as well as in the 
obsoleteness of their inner maxillary lobe, and the largely developed 
penultimate articulation of their palpi; but with the latter in the 
robustness of their limbs, and in the number of their antennal and 
tarsal joints: and, although I have not thought it necessary, in this 
Catalogue, to deviate from the usual plan, of assigning them to the 
Lathridiade, I cannot but record my conviction that they have really 
a closer relation (both in structure and habits) with the Colydiade 
than with the members of our present group. 
185. Monotoma spinifera, n. sp. 
M., nigro-picea subnitida, oculis ante basin capitis sitis, capite pro- 
thoraceque profundius rugose punctatis, hoe ad latera subrotun- 
dato, angulis anticis in spinam magnam exstantem productis, ely- 
tris (preesertim ad humeros) picescentioribus, profunde seriatim 
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