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Table 1 Identification of visitors included in the three visitor taxa: Apis mellifera , Bombus spp., and lepidopterans 1

From: Self-pollination rate and floral-display size in Asclepias syriaca(Common Milkweed) with regard to floral-visitor taxa

Order

Family

Genus

Species

Count

Visitors collected

Hymenoptera

Apidae

Apis

mellifera

51

  

Bombus

bimaculatus

7

   

griseocollis

139

   

impatiens

2

   

vagans

5

Lepidoptera

Arctiidae

Lophocampa

caryae

1

 

Crambidae

-

-

6

 

Geometridae

-

-

7

 

Hesperiidae

Pompeius

verna

1

 

Noctuidae

Megalographa

biloba

6

 

Noctuidae

-

-

1

 

Papilionidae

Papilio

glaucus

1

 

Pyralidae

-

-

4

Visitors not collected

Hymenoptera

Apidae

Apis

mellifera

24

  

Bombus

spp.

118

Lepidoptera

-

-

-

12

 

Hesperiidae

Epargyreus

clarus

2

 

Papilionidae

-

-

1

  

Papilio

glaucus

1

  1. 1Insect visitor’s quick movements at focal inflorescences often prevented us from collecting the visitors. We identified collected visitors to the lowest possible taxonomic level in our lab, and the rest to the lowest possible taxonomic level in the field.