BOTANY: . 231 
be difficult to raise from the larva state, but the difficulty can be 
overcome, and we hope that this paper with the beautiful plates 
containing figures of so many forms, may excite students in 
entomology to rear our dragon flies in aquaria. It is this kind 
of work that tells in advancing science, and a work to which the 
labors of systematists are largely preparatory. Those who live 
away from libraries and museums can easily devote themselves to 
observing the habits and early stages of insects, and thus do as 
much, or even more, to advance entomology than they who give 
their time to describing new species. Mr. Cabot describes the 
immature stages (larva and pupa) of seventeen species of which 
four were raised and identified beyond any doubt. Dr, Hagen 
holds himself responsible for the determination of the species 
‘ and gives a synopsis at the end taken from Mr. Cabot’s descrip- 
F tion. 
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: Tae Lens.*— In spite of the fire the first number of this new 
~ Scientific journal has been reprinted and issued with commendable 
= Dromptness. Among the original articles is a conspectus of the 
| Families and Genera of the Diatomacez,” by Prof. H. L. Smith, 
which will prove very useful to students; while botanists will be 
| interested in the list of plants about Chicago, by H. H. Babcock. 
A - J. J. Woodward describes a new method of photographing 
: histological preparations by sunlight. Dr. Danforth contributes a 
useful article on the preparation and preservation of sections of 
Soft tissues, and the editor gives us a list of the Diatoms of Lake 
Michigan with a description of a new Rhizosolenia (R. eriensis). 
The selected articles and miscellany are timely, and the whole 
appearance of the magazine very pleasing. 
ROTA T, 
Dispersion or SEEDS By THE Wixp.— A Kerner, director of 
Botanic Garden at Innsbruck in the Tyrol, has contributed a 
very interesting paper on this subject to the ‘‘ Zeitschrift des 
en Alpen-vereins.” In order to ascertain the extent to 
Which seeds are carried by currents of air, the writer made a 
“areful investigation of the flora of the glacier-moraines, and of 
ESL uses ee nl 
* ; i 
A Quart ly Journal of Microscopy and the allied Natural Sciences: with the Trana: 
the State Microscopical Society of Illinois. Edited by S. A. Briggs, Chicago. 
-1s 8vo. PP. 64. 1871. Witha lithographic plate and wood cuts. 
