The Zoologist — September, 1868. 1383 



shire, along with Lirnnaeus palustris, Physa fontinalis and Cyclas 

 cornea. 



L. truncatulus. Nearly at the top of Ingleboro'. 



L. palustris. Poulton-le-Fylde. 



Ancylus fluvialilis. On Ingleboro', with Succinia putris and Lirnnaeus 

 truncatulus. 



The Canadian weed (Anacharis alsinastrum) seems to be a favourite 

 with aquatic mollusks : I have almost always found some of the 

 genus Planorbis on it. In our journey we never met with this plant. 

 I seldom find shells on the broad pond-weed (Potamogeton nutans), 

 though it is one of the commonest pond-plants. I lately examined a 

 pond which was full of broad pond-weed, and all I found was Lirnnaeus 

 pereger : the plant was in flower, and the surface of the pond was 

 covered with bees and flies, some creeping on the floating leaves, 

 some at the flowers — a rather curious sight. 



George Roberts. 



Lofthouse, near Wakefield. 



Rare Butterflies. — I think it may interest the readers of the 'Zoologist' to know 

 that, during a month's sojourn at Dover, I and my boy have been very successful in our 

 entomological captures. The beautiful Colias Edusa we met with frequently, and many 

 was the hard chase we had after this brilliant insect ; indeed Inever thought a butterfly 

 could fly so fast and so far as they did, and often they beat our best efforts, but we 

 nevertheless captured a few pairs. Our chief interest, however, was excited by the 

 abundance of that rarer insect, C. Hyale, and its still more uncommon relative 

 C. Helice, and we captured a number of each; in fact, we frequently saw as many as 

 twenty in a morning's ramble, but like C. Edusa they led us many a race up and 

 down hill, and during the late intensely hot weather this was no joke, and we were not 

 uufrequently compelled to acknowledge ourselves beaten. All these three species we 

 found most plentiful on clover or sain-foin stubbles that had been mown or eaten off 

 by sheep. Few to our surprise frequented the clover in flower, of which there was 

 plenty. So partial were they to this clover-stubble that on sunny days we were 

 always sure of meeting with them in two fields especially, about half a mile out of 

 Dover on the Deal side. In one of these fields, at the back of Dover Castle, a much 

 rarer capture we saw made by a young gentleman, being no other than the Bath 

 White (Pieris Daplidice), a fine female insect and a good specimen. It does not 

 often fall to the entomologist's lot either to see this rare butterfly or to capture it, and 

 we gazed on it with delight: it was taken on the 11th of August, and I think its 

 occurrence is worth recording. We found the Grayling (Hipparchia Semele) 

 plentiful on one spot of cliff near the "Zig-zag "at the coast-guard station. The 

 Chalk-hill Blue (Polyommatus Corydon) covered the Downs in thousands. We 

 also took P. Argiolus, P. Alsus and P. JSgon. — W. J. Stertand ; Grove Road, Colney 



