196 
THE WEEKLY ENTOMOLOGIST. 
the divisions of the Linnaean Genus 
Phalcena in this work as follows* 
making each division a distinct genus; 
the Bomlyces in us : Noctuce in ina, 
except the Sallows \X.anthia~\ which 
retain their termination in ago, Hep- 
tali in ator ; Tortrices in ana : Tin- 
ea in ella and the alucita in dactyla .” 
Haworth apparently found it im- 
possible to adhere to this most objec- 
tionable rule in Hepialus and noctua. 
“ Since the body of this work was 
printed, my friend the Rev. Doctor 
Abbott of Bedford has informed me 
that he took in May last near Clapham 
Park Wood in Bedfordshire, a speci- 
men of Pap Mo Podalirius in the 
winged state and that he also took in 
June last in White Wood near Gam- 
lingay, Cambridgeshire the Papilio 
[Puns'] Daplidice in a faded state 
and likewise Papilio [Argynnis~\ 
Lathonia. These are three extremely 
interesting species, and there is not a 
British specimen of any of them extant 
except the above. Podalirius has not 
been seen alive in Britain since the 
time of Ray, unless Berkenhout pos- 
sessed it which he probably might 
because I have heard of his giving a 
high price for a rare Swallowtail 
[Papilio, ] said to be taken in Cam- 
bridgeshire, which is probably the 
identical specimen of Podalirius, that 
he has described in his Synopsis of 
the Natural History of Great Britain, 
and which he there says is * rare in 
woods ’ * * * * * * A friend has 
informed me that he took two sorts of 
Swallow-tailed Papilios near Bever- 
ley in Yorkshire, five and twenty 
years ago, but no specimens of them 
are now extant. 
Now as we have only two Swallow- 
tailed species in Great Britain one of 
the above in all probability was Podal- 
irius. I know Machaon # * * * 
breeds near Beverley yet.” 
Papilio Podalirius is a common con- 
tinental species, but it is probably 
extinct in England, When once an 
insular species is overpowered by any 
cause, it is far more liable to become 
extinct than a continental one. The 
allied species Machaon and Hospiton 
both occur in Corsica, but Machaon is 
rare and it is very probable that Uos- 
piton which is confined to the Island, 
will crush it out entirely in a few 
years. The question of the production 
and extermination of species have not 
yet received the attention they 
deserve. 
“ Papilio \_Pieris~\ Daplidice, was 
taken in England in the days of the 
indefatigable Petiver by his friend 
Yernon, but never since that time un- 
less the very ambiguous account of 
it in Lewin’s work is admissible. * * 
* * There is no British specimen 
of it now extant except my friend 
Abbott’s.” 
He goes on to say that the Gamlin- 
gay Lathonia is double-brooded, and 
doubts whether it is the same species 
as that which occurs near Loudon. I 
see no reason for imagining that they 
were distinct species. “Lathonia 
was not very rare in Gamlingay Wood. 
Cambridgeshire, in the days of Petiver 
It has also been taken at Wisbeaeh * 
* * * * Our London Lathonia is in- 
