178 FLOWERS AND INSECTS—XXVI 
brachyrrhynchus, Dalmannia, Myopa vesiculosa; Tachin.: Archytas 
analis, aterrima, Linnaemyia, Trichopoda pennipes; Sarcophag.: 
Helicobia helicis; Musc.: Pseudopyrellia; Anthomy.: Anthomyiella, 
Phorbia platura fq. 
Lepidoptera (2)—Nymphal.: Neonympha; Agarist.: Alypia. 
May 27, 1911, the following 22 species and 44 individuals were 
taken on the flowers: 
Long-tongued Bees (4: 21)—Ap.: Apis 6; Bomb.: Bombias auri- 
comus 1; Ceratin.: Ceratina 13; Hucer.: Tetralonia dilecta 1. 
Short-tongued Bees (11: 16)—Halict.: Agapostemon viridulus 
1, Chloralictus sparsus 3, tegularis 1; Prosopid.: Prosopis ziziae 1; 
Collet.: Colletes eulophi 1; Andren.: Opandrena eressonii 1, 
miserabilis 2, serotina 1, Trachandrena crataegi 2, heraclei 2, 
hippotes 1. 
Other Hymenoptera (4:4)—Sphec.: Sphex vulgaris 1; 
Philanth.: Cerceris compar 1; Crabron.: Solenius 1; Oxybel.: Noto- 
glossa americana, 1. 
Diptera (3: 3)—Syrph.: Sphaerophoria 1, Syritta 1; Empid.: 
Empis levicula 1. 
Zanthoxylum americanum (7:109-11)—Blooms March 31- 
April 28; 59 visitors observed, April 9-25; Mis, Y. 
On staminate flowers (7) :— 
Short-tongued Bees (2, 9)—Halict.: Chloralictus cressonii, 
Curtisapis coriacea. 
Other Hymenoptera (38)—Vesp.: Polistes pallipes; Pompil.: 
Cryptocheilus conicus; Chrysid.: Holochrysis hilaris. 
Diptera (1)—Syrph.: Brachypalpus frontosus. 
Coleoptera (1)—Oedemer.: Asclera puncticollis. 
On staminate and pistillate flowers (16) :— 
Long-tongued Bees (4, ab)—Ap.: Apis se; Megachil.: Osmia 
pumila ¢; Nomad.: Gnathias cuneatus ¢ 9, type, Xanthidium lu- 
teolum ¢ 9. 
Short-tongued Bees (10)—Halict. (9) : Chloralictus sparsus se, 
ab, versatus se, ab, Oxystoglossa confusa; Collet.: Colletes inae- 
qualis { 9, ab, in cop; Andren.: Andrena sayi 3, ab, Opandrena 
eressonii ¢' 9, ab, miserabilis ¢ 9, ab, dasha claytoniae J 9, 
ab, forbesii ¢' 9, fq, rugosa <, fq. 
Diptera (2)—Syrph.: Mesogramma geminata ab; Tachin.: 
Gonia ecapitata ab. 
On pistillate flowers (36) :— 
Long-tongued Bees (8)—Ceratin.: Zaodontomerus ¢; Megachil.: 
Ceratosmia ¢' 9, ab; Nomad.: Gnathias ovatus 0, fg, Nomada cres- 
