A 
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THE DIURNI OF BAST TYRONE. 9 
any of Leach’s species of ants in the Natural History Museum ; and 
his descriptions are such that it is quite impossible to make out what 
the insects marked by v. Dalla Torre with a note of exclamation really 
are. 
If v. Dalla Torre is correct as to Leach’s no. 7, André’s var. niger of 
Messor barbarus L., will sink, and will have to be known as Messor 
barbarus L., var. huberianus Leach. ; 
The most unfortunate point in nomenclature which arises is that 
concerning the name Hormica picea. For over 50 years the species we 
now know as F. picea Nylander, was confused with F’. yagates Latr., 
until 1909, when Emery separated it from that species on the conti- 
nent (Deutsch. Ent. Zeitschr., 1909, 195), and in 1912 I put the matter 
right for the British species [Hnt. Rec., 24, 306 (1912) ; see also Hint. 
Ree., 25, 67-8 (1913) ; and Brit. Ants, 325-34 (1915)]. 
There cannot, however, be two species called ‘* Formica picea,” and 
as Leach’s name has 21 years’ priority, Nylander’s name must fall ! 
This being the species described by Farren White in 1883 as Formica 
glabra, the latter name would have to be used ; but unfortunately there 
is another Formica glabra Gmelin, Linné Syst. Nat., ed. 13, i. 5, 2804 
(1790), which is fatal to the adoption of Farren White’s name. It is 
also probably not ascertainable what Gmelin’s species really is, but at 
any rate it cannot be what we know as F. picea Nyl., since the scale is 
described as bidentate. The next name in order of date for this insect 
is Formica transkaukasica Nassonow, Imp. Obsheh. Lyrrb. Est-Ant-Etn. 
Mose., 58, (1) 62 [=Tr. Lab. Zool-Mus., 2, (1) 62] (1889), and this is 
what the insect we know as Formica picea Nyl., will have to be called. 
I have given the names of Leach’s species of Culex, but must leave 
this matter for our Dipterists to deal with. 
The Diurni of East Tyrone. 
By THOMAS GREER. 
As an increasing interest is being taken in the local variation of 
Lepidoptera from Ireland, I have compiled the following notes on 
insects observed in this district. 
Although the butterflies met with, only number some twenty species, 
the lack of quantity is to a certain extent compensated by the diverse 
variation exhibited. 
Pieris brassicae —Almost entirely single brooded, although during 
some warm autumns, a certain number or larve may feed up rapidly 
and produce a partial second brood, the greater number remaining as 
pupe and not emerging till the following year. In some seasons very 
abundant, in others, very rare, or almost absent. 
P. rapae.—Unlike its larger relative this species is always double 
brooded ; many of the females of the summer brood are of a pale 
yellow colour. 
_ P.napi.—This species is in this locality more abundant in damp, 
meadows and marshes than in woodlands; these swampy localities are 
always more or less under several feet of water during the winter months, 
hundreds of pups of this, as well as other species being submerged, 
often for long periods. 
_ In the spring brood many of the males are without the apical blotch 
' and discal spot, while others have the blotch and spot well developed ; 
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