No. 397] VISITORS OF THE CAPRIFOLIACEZ. 45 
the two shorter stamens. The stamens are four, included, 
didynamous, and the anthers dehisce introrsely. The total 
length of the flower is about 10 mm., of the pistil 11 mm., so 
that the green capitate stigma is exserted, an arrangement 
favoring cross-fertilization. A legitimate visitor, in creeping 
over the edge of the bell, comes in contact first with the stigma 
and deposits upon it pollen brought from another flower; sub- 
sequently, while sucking honey, the underside of its body 
brushes the anthers of the two longer stamens, and the head 
touches the anthers of the two shorter. Within the corolla 
are many inter-crossing hairs, which exclude small, useless 
flies, which I have seen vainly seeking an entrance. They 
also afford a foothold to the proper guests. 
During a part of an afternoon a large bed of Linnza in full 
bloom was carefully observed, and eight visitors were collected. 
On examination they all were found to belong to a single 
species of fly, Empis rufescens Loew, of the Empidide. Other 
observations showed that in this locality this fly is the most 
frequent and perhaps the only pollenizer. In the Alps, Müller 
observed three Diptera and one butterfly. The butterfly was 
probably an accidental visitor, as these insects are unusually 
abundant in the Alps. Loew saw in Brandenburg a long- 
legged fly, Neurigona quadrifasciata F., of the family Dolicho- 
podida. This family is closely allied to the Empidide. The 
flowers of Z. borealis L. are, then, in both continents, adapted 
to slender flies which live in woodlands, I saw a female bumble- 
bee fly over a bed of the flowers without paying any attention 
to them. Self-fertilization may occur by the pollen falling in 
some instances upon the stigma. ; 
Visitors: Diptera; Empididæ; Empis rufescens Loew, suck- 
ing, common. Waldoboro, June to July 6. 
LONICERA. 
Lonicera ciliata Muhl. American Fly Honeysuckle. 
This is the only species of Lonicera native in this locality. 
The pendulous, funnel-formed flowers are sheltered beneath the 
young leaves. The tube is ro mm. to 11 mm. long and con- 
