4 THE ENTOMOLOGIST’S RECORD. 
Prof. F. V. Theobald sent me some ants to name, which he told me 
were causing great annoyance in a house at Hastbourne. These I at 
once recognised as the “‘ Argentine Ant,” which may prove to be a very 
serious pest, and is very difficult to get rid of. It has been found in 
Belfast and Edinburgh, but this is its first record for England (see 
Brit. Ants, p. 842). 
CamponotTin® : Prenolepis longicornis, Latr.—Taken by Evans in 
Yester Gardens, Haddington, March, 1904. 
Prenolepis vividula, Nyl.—Taken by Evans in the Botanic Gardens 
at Edinburgh, in August, 1898. 
Mr. Evans has sent me these records, which are not in my book, 
and have not been published before. (See Brit. Ants, pp. 345 and 346.) 
Camponotus (Camponotus) fallax-fallax, Nyl.—Mr. Mitford kindly 
sent me a deilated @ of this ant, which was taken in London. in the 
City, on October 15th, crawling on a cargo of deals and boards from 
the shore of the White Sea. This species has not been captured in 
Britain before; it occurs in France, Austria, Germany, Switzerland, 
Russia, etc. 
(Z'o be continued.) 
A North Italian Valley. 
By C. B. WILLIAMS, B.A., F.E.S. 
The following is an account of the results of a short entomological 
trip to the valley of the Tosa river, called the Val Antigorio in the 
lower portion, and Val Formazza in the upper, on the Italian side of 
the Alps, during June of 1914. This valley is a branch of the southern 
approach to the Simplon Pass extending from Domodossola to the 
southern side of Gries Pass. The itinerary starts from Domodossola 
912ft. above sea level, and goes up to the Tosa Falls at 5,490ft. 
elevation. The chief object of the trip was to get living females and 
eges of Pieris napi of the two extreme forms, var. 2 bryontae from the 
upper part of the valley, and the almost unveined Southern European 
form, the extreme of ab. napaeae, from the lower regions. Next in import- 
ance was the getting together of a collection of Thysanoptera from this 
quite unknown region. The short time not occupied in these two 
pursuits was given to general collecting, and the only excuse for the 
following notes, chiefly on Lepidoptera, is, that this valley being rather 
inaccessible, particularly in its higher reaches, has been little visited by 
entomologists and no records have been published. 
I arrived at Domodossola at midday on June 16th, 1914, and 
spent the afternoon and the following morning collecting, chiefly in the 
district just south of the town. Only a single female of Pieris napi 
was taken, but this condescended to lay about 120 eges during the 
course of the next week and was still alive on my return to London on 
June 26th. Other Pierids included P. brassicae and P. rapae, both 
of which were abundant, Leptosia sinapis was occasionally seen ; Colias 
edusa Was somewhat worn and Gonepteryx rhamni was noted. On the 
road to Varna several Libythea celtis were seen and two captured one of 
which was very deep in coloration, and on the same road Pyrameis 
atalanta, Aglais urticae and Hugonia polychloros were not uncommon. 
Aryynnis aglaia and Issorta lathonia, males of a small form, were the 
