CHARLES ROBERTSON 5 
occur on the flowers. They are worthless as data of insect habits 
because the collector is certain to select the flowers which are most 
favorable for observation and which are most attractive to the kinds 
of insects he is after. Collectors’ notes almost invariably fail to 
indicate what the insects are doing on the flowers and whether they 
affect pollination or not. 
The following persons made additions to the local lists of the 
plants mentioned—Prof. I. H. Benham: Blephilia hirsuta, Eupa- 
torium perfoliatum, Teucrium canadense; George T. Palmer: . 
Erigeron ramosus, Stachys palustris; Robertson Palmer: Lllisia 
nyctelaea, Hypoxis hirsuta, Polemonium reptans, Sambucus cana- 
densis, Scutellaria parvula; H. B. Parks: Achillea millefolium, 
Apocynum cannabinum, Blephilia ciliata, Cassia chamaecrista, 
Ceanothus americanus, Cicuta maculata, Cucurbita pepo, Eryngium 
yuccifolium, Eulophus americanus, Lepachys pinnata, Monarda 
fistulosa, Pastinaca sativa, Polygala sanguinea, Prunus americana, 
P. serotina, Pycnanthemum fleruosum, P. pilosum, Rhus copallina, 
R. glabra, Rosa humilis, R. setigera, Salix nigra, Sambucus cana- 
densis, Stenanthium angustifolium, Veronica virginica. 
In some cases the lists were based on the older nomenclature, so 
that I did not care to rewrite and rearrange them. In the pre- 
liminary list some of the later specific names are given in paren- 
thesis. After changing Danais archippus to Anosia plerippus it is 
a little tiresome to change it back to former name, and then to 
Danaus. Anyhow, biological nomenclature is synonymiecal, not bi- 
nomial. The older names usually have more important relation to 
anthecological literature. Authors will have to use them whether 
they like them or not. Often the synonymy is a subject of con- 
troversy. Of 455 plants mentioned here, about 70 have their names 
changed in Gray’s Manual. 
