7 6 THE ENTOMOLOGIST. 



more careful working. The best part is about three miles from 

 the Schloss-platz, along the road to Marienbad to the south-east ; 

 in fact the road follows the river, and if you walk up stream you 

 cannot miss it. The best part begins just where another road 

 branches off to the left towards a mill on the river, but you must 

 keep straight on along the steep bank on the right. If the 

 weather is fine you will soon be busy, for this is a locality where 

 Apatura iris, L. populi, Papilio machaon, Vanessa c-album, 

 Argynnis paphia, and many others may be found, either 

 enjoying some muddy spot left from the last shower of rain, 

 or flitting from flower to flower. The best time to begin is 

 11 a.m., as we found repeatedly that it was perfectly useless 

 working one's ground before that hour. 



I will now give a list of the species captured, and the 

 following notes are intended to give shortly the date and locality. 

 I have adopted Dr. Staudinger's nomenclature and classification : — 

 Papilio machaon. — I obtained one specimen on the Marienbad 

 road on July 3rd, hovering over a flower of the common parsnip. 

 Pieris napi, P. rapes, P. brassica. — The two former were 

 abundant on and after July 9th; P. brassicce, however, appeared 

 in fair numbers on the llth. 



Leucophasia sinapis only put in an appearance twice about 

 June 29th, when we captured two specimens. 



Of Thecla pruni we saw and captured a few on June 29th, on 

 the brambles growing on the road- side beyond the cemeteiy. 

 T. rubi also was in poor condition and rare on July 10th. 

 The genus Polyommatus was represented by no less than five 

 species : — 



P. virgaurea. — It would be difficult to name a suitable localit}' 

 where the males of this beautiful species did not abound ; — in the 

 little valleys surrounded by sombre pines on the Marienbad 

 road ; in the forest glades he is alike at home, at one moment 

 exploring the hidden sweets of some favourite flower, at another 

 disturbed by your careless step he vanishes with the peculiar 

 flight of his race, just allowing one glance of his brilliant hue. 

 We observed the male in scanty but increasing numbers up 

 to July 5th, after which he was very common. The females, on 

 the contrary, were very rare, having caught but four ; the first on 

 June 26th, the last on July 12th. Whether the females emerge 

 from the pupse later on, or whether from less obtrusive habits and 



