100 
A. F. GRIFFITH-LEPIDOPTERA 
Pseudobombyces, of which thirteen species are recorded against my 
eighteen, the one Aventia, the Tortrices, of which only 136 species 
are recorded, and the Tineina, which number 245 against my 266. 
This excess is, however, easily accounted for, not only by the 
larger number of collectors, and by some of them being residents, 
but also by the very varied nature of the Isle of Purbeck, including 
as it does wild heaths (which practically form an outlier of the 
Hew Porest), chalk downs, undercliffs, and sand-dunes, a com¬ 
bination which gives unique advantages to any one who can 
command such happy hunting-grounds. On the other hand, a 
published list of Lepidoptera observed in West Sussex (another 
singularly rich district) shows but 661 species, and the only 
families in this list showing a greater number of species than in 
mine are the Diurni with thirty-five and the Pterophorina with 
twelve. But Mr. Pletcher, who published this West Sussex list 
four or five years ago, has since been steadily working up the 
district, and could no doubt largely add to it now. The com¬ 
parison, however, is not an unsatisfactory one, and may serve to 
stimulate some of our members to greater exertions. In spite of 
the uniform and comparatively uninteresting character of the 
district around Sandridge, it is with the greatest regret that I have 
been compelled to give up my systematic collecting there, just at 
the time that I was beginning to put the final touches, so to speak, 
to the work. But I hope that other members of our Society, with 
better opportunities than mine and more energy than I could 
bestow upon it, will follow up the subject and make the list of 
Hertfordshire Lepidoptera worthy of our County and its Natural 
History Society. 
I append the Corrigenda and Addenda to my former paper, and 
list of Sandridge Tineina. Also a list of a few additional species 
observed by myself in other localities in Hertfordshire. 
Corrigenda. 
For Penthina ochromelana read P. ochroleucana. 
„ „ carbonana „ ,, ustulana. 
Dele Ephippiphora gallicolana. 
Addenda. 
Additional Lepidoptera (other than Tineina) observed in the 
neighbourhood of Sandridge by myself. 
Nocturni. 
Orgyia gonostigma. 
GrEOMETRINA. 
Venilia maculata 
Ennomos tiliaria 
Eupisteria heparata 
Acidalia incanaria 
Xylophasia rurea 
Apamea ophiogramma 
Miana fasciuncula 
Acidalia inornata 
Eupitkecia trisignata 
,, albipunctata 
Lobophora sexalata 
Thera firmata 
Noctuina. 
Miana literosa 
,, arcuosa 
Taeniocampa mimosa 
Scotosia certata 
Eubolia cervinata 
,, bipunctaria 
Chesias spartiata 
Cerastis spadicea 
Dianthoecia carpophaga 
Calocampa exoleta 
