68 LEPIDOPTERA. 
have in our district a smaller percentage of the total-number 
of species occurring in Great Britain which feed on trees, &c., 
than we have of those which live on herbaceous plants. 
To commence again witn the Butterflies, we have 587 of all 
the species occurring in Great Britain. But of those that feed 
on herbaceous plants (hereafter called ‘‘ plant-eaters””) we have 
717, against 367 of those that feed on trees or shrubs (here- 
after called ‘‘ tree-eaters.”) Indeed we have only 4 species of 
the latter class, and of these G. Rhamniis scarce, V. Polychloros 
very rare, and LZ. Argiolus and 7. Quercus very far from common. 
G. C-album and T. Rubi feed both on plants and shrubs, but 
the former though generally distributed is far from common, 
and the latter is only recorded from the E. side of our district. 
I have however met with it in Merionethshire, near Bala Lake. 
In Yorkshire, G. Rhamni is ‘‘of general occurrence”; V. Poly- 
chloros ‘not uncommon”; 7. Rudi occurs in 5. and 7. Quercus 
in 10 localities; and 7. W.-album (another tree-feeder) in 4, in 
2 of which it is abundant. 
Passing by the Sphzmgina with the remark that we have 16 
species, of which only 2 (S. ocellatus and S. Popul) are tree- 
feeders, while Yorkshire has 18 with 3 tree-feeders, we come to 
the Bombycina, in which I include, after Stainton, the Hepialide 
Pseudo-Bombyces, &e. Of the 101 species of this class we have 
56, and of these, omitting such as the lichen-eating Lithoside, 
18 out of a total 25, or 727, are plant-eaters, and z9 out of a 
total 57, say 507, are tree-eaters. Yorkshire has 68 species, of 
which 38, or nearly 677, are tree-feeders, and 17, or 687, plant- 
feeders. With the exception of P. auriflua and O. antiqua, 
none of the tree-feeders can be considered common in this 
district. : 
To the next family—the JWoc/uina—belong the bulk of the 
Macro-Lepidopiera of the Chester district, whether we consider 
species or individuals. Of the 294 species in Great Britain we 
have 59147. Of the 212 species that feed on plants we have 
134, or 637. Of the 63 species that feed on trees we have 30, 
or 477. I have not gone through the species that occur in 
Yorkshire, but in the tree feeding genus Cymatophora we have 
but 2 species, both rare, against 6 species in Yorkshire. 
I will not pursue the comparison further, but the annexed 
table will show that in all the orders the number of species in 
Yorkshire much exceeds that in our district. 
Chester 
District. Yorkshire. 
DUNS ies ate ese eeeeee 37 us 46 
SS PEUNGI MAN fo ialhr dalsinsisi sissies 18 a 26 
BOMmDYCINA-. fu sianias Saige ule 56 3 68 
INGE ULES Oty ota xs} ohni saree, ere Top 184 BS 224 
GEOMeUUIN Ais ens crite reals ete 165 Be 205 
Pykalidinial (Mit. velectes de creas 69 Fe 97 
