Botany and Zoology. 291 
ocky Mountains and upon them he was gleaning 
after Drummond, who left nothing for his successor to discover, But on 
_ the western side, and on Vancouver’s Island, he found much that was 
‘Bovel and interesting. While publishing the new species now brought 
to light, Mr. Mitten also revises the collections of Drummond, both the 
Northern and the Southern Mosses, and characterizes a goodly number 
species which had remained obscure and. undistributed, or had been 
confused with others. Again, others are descri rom Bourgeau’s, 
Coulter's, Fendler’s, and Wright’s collections. A good set of the dupli- 
¢ates of Lyall’s and Bourgeau’s muscological collections, sent to this 
country, has been placed in the hands of Mr. Sullivant. er 
4. Icones Muscovum ; y Wm. 8. Suiiivan —Weare able to announce 
that this, the most exquisite of all illustrated bryological works, has been 
punted, and is about to be issued forms an imperial 8vo volume, 
G. 
A. G 
_ 5. On the Currant Worm of Ann Arbor, Michigan; by Prof. A, 
— Wivcnet, (Condensed from an article in the Detroit Free Press of July 
9, 1864.)—This “currant worm,” is the larve of a Hymenopter of the 
‘enus Selandria, and is named Selandria Ribis by Prof, Winchell. It 
___Was observed by him last summer. This summer it has been still more 
abundant, and has, in places, completely denuded the red currant bush 
of its foliage, doing it considerable injury, though for the present year 
‘the crop of fruit does not seem materially deteriorated. 
@ worm was first seen, May 23. Individuals were then about one- 
fourth of an inch in length, and had just begun to depredate upon that 
Part of the foliage nearest the ground. They devoured rapidly the whole 
-_lssue of the leaf, leaving only the thicker part of the nerves, and move 
‘from leaf to leaf, gradually extending their ravages toward the summits 
‘he stems. 
Proceeds one, two or more short, stiff hairs. Number of segments of the 
ody 14 (including head and tail), of which the 2d and 12th, are’ yel- 
‘owish green. The 2d, 3d and 4th segments are furnished each with a 
t of feet; the 5th is short and without feet; the 6th, 7th, Sth, 9th, 
and 11th with short, extensile prolegs—that is, fleshy protuberances, 
be used as legs; 12th and 13th, segments without legs. 
