
212 ; REVIEWS. 
lower temperature, or the reverse. It is also sometimes 
found difficult to grow several kinds in one tank success- 
fully. ` The common water-cress (Nasturtium officinale), for 
example, found mostly in cold springs and their brooks, will 
do well with water starwort (Callitriche verna), a plant 
growing in a similar situation, if the water in the tank is 
kept at a low temperature; but at a moderately high one 
grows long and rank, and finally decays. So again many 
plants which grow in brooks or rivers, and had become 
aceustomed to be constantly moved by a current, when 
placed in the still water of an aquarium inevitably mould 
away.— To be continued. 

REVIEWS. 
———9Oo.——— 
E BUTTERFLIES OF New ENGLAND. — The notice in our last number 
of Mr. Scudder's promised work on New England Butterflies, has already 
brought many welcome responses. A number of living butterflies have 
been sent in cotton wool, and although a day upon their journey, were 
received alive and in good condition; those who live near Boston might 
try this method, but we think that most persons would be interested in 
raising the larve themselves. In attempting to obtain eggs for this pur- 
pose, it js better not to select the freshest butterflies, as their eggs Will 
often prove undeveloped, or at least unimpregnated. It should also be 
remembered that the males usually appear about a week before the fe- 
made about a fortnight after the species is first observed. The following 
butterflies can be experimented upon by the time these lines meet the 
reader's eye pid oleracea, rape and Protodice; Colias Philodice ; AN 
thocaris Genutia ; Chrysophanus Americanus; Lycena Lucia and Comyntas 
Thecla Anbar na, Niphon, Augustus and Henrici; Argynnis Bellona ; 
ui, Huntera and Atalanta; Vanessa Milberti and interroga- 
ia Massasoit, Quadaquina, Pocahontas, Metea and others. 
qo 
= he: he following species, the earlier stages of Witch ase unknown, probably 
on the plants specified : — Anthocaris Genutia on cruciferous plants; 
peris Lucia on buckthorn; Thecla Auburniana on smilax; T. Niphon on 
pine; 7. Augustus and Henrici on vaccinium; Argynnis Bellona on vio- 
lets or or raspberry ; and the different species of Hesperia on poplar; scrub 
Aat EL 





