1044 General Notes. [October, 
to him. These sketches should, of course, be very exact, and ia 
order that they may be so, it is necessary that the mi 
should be provided with an eye-piece micrometer with which to 
measure the length and breadth of the figure to be sketched, 
* * It is so difficult to separate specimens from their accom- 
panying foreign matter that it is seldom amateurs can mount 
them satisfactorily on slides, and therefore this method of pre- 
dation.” 
serving specimens is not open to recommendati 
New Mexico and Montana. Two varieties of this species are 
noted, viz., var. sericea (O. sericea Nutt.) from Wyoming to tha 
and Arizona, and var. digelovii ( O. lamberti Torr., in Pacific R. 
Rept., 1v, 80) on the Upper Canadian river. All the other i 
cies are from the Rocky Mountain region and Alaska i 
the foregoing we have also Notes on some American pene 
Saxifraga, by the same author. Joseph F. James one 
tions to the Flora of Cincinnati, in the Jour, Cin. Sw, he’ cin- 
contains many interesting notes on certain plants of a # ie 
nati flora. In an interesting paper, “ Untersuchungen ear 
Bildung von centrifugalen Wandverdickungen an P sp nck 
und Epidermen,” just received, the author, Heinrich er | 
discusses the thickening of the cell-walls of hairs and ep! 
cells. A large plate with numerous figures illustrates the m 
- Drugs and Medicines of North America is the ee ‘ig: 
promising new quarterly illustrated journal devoted to gad 
cussion of the botany, pharmacy, chemistry and therapet orthy 
the medicinal plants of North America. It appears to isa Cin- 
. of support. It is published by Lloyd Bros., 180 Elm ai 
cinnati, Ohio, for $1 per year. 
ENTOMOLOGY. = 
Lire History oF Locumaus TESSELLA.— The caterpillar oe 
organs. This caterpillar is also interesting from its power 
touched of forcing out a dense cloud of fine spray tom sit- 
near the head; exactly where this repugnatorial apparatu 
