42 MADEIRAN COLEOPTERA. 
121. Rhyzophagus bipustulatus*. 
R. linearis subdepressus piceus nitidus glaber, prothorace oblongo, 
profunde punctato, elytris punctato-striatis, singulo ante apicem 
macula obscura pallidiore ornato, antennis pedibusque rufo-ferru- 
gineis. 
Long. corp. lin. 1}—vix 2. 
Lyctus 2-pustulatus, Fub., Ent. Syst. i. ii. 503 (1792). 
Ryzophagus bipunctulatus, Host, Kaf. v. tab. 45. f.9 (1793). 
Lyctus dispar, var. 8, Payk., Fra Suec. iii. 328 (1800). 
Rhizophagus bipustulatus, Evich., Nat. der Ins. Deutsch. iii. 234 (1848). 
Jt. narrow, linear, somewhat depressed, glabrous, shining, and 
piceous. Head rather closely punctured. Prothorax more coarsely, 
but less closely, punctured than the head; oblong, narrowly mar- 
gined at the sides and behind, and unchanneled. Zlytra rather 
deeply punctate-striated; each with a more or less obscure paler 
spot towards its apex, and occasionally with indications of a smaller 
one at the shoulder. Limbs rufo-ferruginous. 
The &. bipustulatus, so universally distributed throughout Europe, 
was detected in Madeira by C. Bewicke, Esq., who lately discovered 
it beneath the bark of Spanish chestnut-trees on the mountains 
above Funchal. Knowing how lable the Rhyzophagi, and such like 
insects, are to importation, amongst foreign timber, my first im- 
pression was to regard it as probably of recent introduction from 
more northern latitudes; but the opinion of Mr. Bewicke, that it 
bore the appearance of being strictly indigenous, I have since con- 
firmed by a close examination of its characters,—observing that, like 
all other species of long-standing in these islands, it has become 
slightly modified, from the local influences to which it has been 
exposed. The only permanent distinction which I can perceive, in 
the present instance, however, is, that the prothorax of the Madeiran 
specimens is somewhat more laterally compressed at its anterior 
angles,—causing the sides to be more rounded than is the case in the 
European ones; and the broadest portion of it to be, not at the 
extreme front (as in them), but rather behind it. The examples in 
the British Museum were presented by their captor, Mr. Bewicke. 
Fam. 11. COLYDIADZ. 
Genus 50. TARPHIUS. 
’ (Germar) Erich., Nat. der Ins. Deutsch. iii. 256 (1848). 
122. Tarphius parallelus. 
Tarphius parallelus, Woll., Ins. Mad. 134 (1854). 
Inhabits the lofty sylvan districts of Madeira proper (especially in 
