114 MADEIRAN COLEOPTERA. 
328. Atlantis noctivagans. 
Atlantis noctivagans, Woll., Ins. Mad. 367 (1854). 
—— lauripotens et australis, Woll., Ins. Mad. 869, 370 (1854). 
Inhabits Madeira proper, occurring on the foliage of the native 
laurels at nearly all elevations. It is an exceedingly variable insect, 
not only in its colour and size, but likewise, to a certain extent, even 
in the development of the inner heel of its hinder male tibie,— 
which is usually rather more produced and acute in the specimens 
from a higher altitude than in those from the lower ones. It was 
on this account that I was induced to form two more species out of 
it than I now believe can be legitimately maintained, and which 
I have consequently suppressed. At the same time I would not 
wish to imply for certain that a second species may not be indicated 
in the less elevated districts ; and should such be eventually ascer- 
tained to be the case, it will be referable to the A. lawripotens of the 
Insecta Maderensia,—in which the anterior tibize are somewhat less 
rounded towards their inner base, the hinder heel less acute, and the 
pubescence generally finer and more dense. Still, as just stated, it 
is my present opinion that these small differences (which I believe 
shade-off into each other) are the result of the mere local influences 
of the various elevations in which the creature obtains, and cannot 
be made use of for real specific characters. The A. noctivagans (as 
now enunciated) may be said, therefore, to attain its maximum 
(like the A. lamellipes) towards the upper limits of the sylvan tracts, 
where it is somewhat more robust and brightly tessellated than in 
less elevated regions. 
329. Atlantis vespertinus. 
Atlantis vespertinus, Woll., Ins. Mad. 371. tab. vii. f. 4 (1854). 
Inhabits Madeira proper, abounding beneath stones on the open 
grassy slopes of the highest elevations. 
330. Atlantis lanatus. 
Atlantis lanatus, Woll., Ins. Mad. 372. tab, vii. f.6 (1854). 
Inhabits Madeira proper, occurring principally towards the lower 
limits of the sylvan districts. 
331. Atlantis navicularis. 
Atlantis navicularis, Woll., Ins. Mad. 374 (1854). 
Inhabits Porto Santo, occurring for the most part about the sand- 
hills behind the southern beach. 
