Entomological Hxecursion to Corsica. 227 
From Vizzavona, excursions were made to Tattone, 
Vivario, Corte, Bocognano, Tavera, Ajaccio, etc., the rail- 
way helping a good deal for this purpose ; but most of the 
time was spent in the mountains. At Corte, about half- 
way between Vizzavona and Bastia, in the northern central 
part of the island, to which we made a pleasant three 
days’ excursion, the heat notwithstanding, there is more 
water, the united streams, the Restonica and Tavignano, 
forming a river of considerable size, the banks of which 
were productive in small Coleoptera. Of the cork-oaks, 
of which there are forests in some parts of the island, 
we saw very few in any of the places visited. At 
Bocognano we received a good deal of assistance and 
kind hospitality from Dr. Trotter, this place producing 
many of the species peculiar to the ‘“macchie” and to 
the low country. Still, my list contains but a meagre 
assortment of these latter, it being already much too 
late in the season for most of them, everything being by 
this time parched up near the coast. One thing struck 
me as peculiar, viz., the scarcity of Cryptocephalus ; a 
similar amount of work in the south of I'rance or Spain 
would have produced many species. 
Corsica contains a large number of Coleoptera 
peculiar to itself, upwards of two hundred being given 
in the last European Catalogue (v. Heyden, Reitter, and 
Weise, 1891) from Corsica alone, the Staphylinidee and 
the Rhynchophora each having over thirty peculiar 
species ; and perhaps a still larger number of species are 
common to Corsica and Sardinia, and which do not 
extend on to the Italian mainland. One of the most 
characteristic genera, and one most in evidence, is 
Percus (a close ally of Plerostichus), which is represented 
by several peculiar species, its other members inhabiting 
Italy, Sardinia, Sicily, the Balearic Islands, and Spain. 
One abundant insect in the island, Cetonia awrata, 
affords an instance of the extraordinary amount of 
variation possible within the same species, the different 
varieties occurring together indiscriminately, and quite 
irrespective of a varied geographical distribution, or of 
a difference in altitude of the locality. Two very in- 
teresting papers have already been published on the 
Coleoptera .of the island: (1) ‘‘ Kin entomologischer 
Ausflug in die Berge Siid-Corsica’s,” by G. Dieck (Berl. 
ent. Zeitschr., 1870, pp. 397—404). This exceedingly 
