412 Scientific Intelligence, 
who of late has especially studied the arrangements in flowers for 
the exclusion of unbidden guests, as he terms them, appears to 
have anticipated this —— in respect to Peat While 
making observations upon the five forms of these two species which 
were in cultivation at Deasacts Dr. Errera was firal SFa2 to find 
that only one of _ was freely visited by hym Siege insects : 
this was a form . Hartwegi, with maiivecolore « rolla. The 
others, though Samendlhy tried, were, on the ale. pegiicteds 
and he found that this remarkable preference daisetihes not at all 
upon the abundance or quality of the nectar, nor upon the per- 
fume, nor upon the color of the corolla, exce spt by a coincidence 
as to the latter; but in the fact, that in all but the mauve-colored 
form, the cur vature of the sterile filament, which obstructed 
further entrance, was so high in the tube that ‘the tongue of these 
insects could not reach the nectar at the bottom of the tube. A 
difference of a millimeter or two in the ature of the sterile 
filament or the length of the tube below, determined whether or 
not the flowers should be fertilized in Belgium 
irrera’s paper is pc gers ed in the 17th volume of the Bulletin 
de la —— Royale de Botanique de Belgique, shane , 1879, 
evaert, wal ne 140 pages, 8vo. The motto of the paper is 
taken from Darwin—* Whoever is Ted to believe that species are 
eee will do good service by conscientiously expressing his 
conviction.” The authors have expressed theirs, and the py 
of it, with great fullnes 
8. Revue Mycologique, is the title of a new periodical, devowed 
to the study of Fungi, under the editorship of M. Roumeguére of 
Toulouse, published at that city and at Paris ( ep OK the first 
number, of 44 pages, 8vo, issued in January last. Price franes 
ayear. The leading article is upon the Lichen pila in the 
light of the recent investigations of Dr. Minks, confirmed by 
Mueller of Geneva. Half of this first fasciculus is devoted to 
notices of recent publications and to mycological news. ‘The 
editor takes notice of Professor Hitchcock’s recent proposition to 
the sonia sven in the convention at ec eH) to adopt the 
sy Of a millimeter as the micrometric unit, and regrets it, on 
e 
proposition of Suringar of Leyden) of the oo. of a pat re 
Les by the Greek 41) as the micrometric w 
viliana, and Etchinocatus 
