182 FLOWERS AND INSECTS—XXVI 
Other Hymenoptera (1)—Vesp.: Polistes variatus. 
Diptera (11)—Syrph.: Eristalis transversus, Merapioidus; 
Tachin.: Euphorocera cinerea, claripennis, Panzeria, Tachina 
robusta; Sarcophag.: Calliphora erythrocephala; Musc.: Myospila, 
Pollenia; Oscin.: Oscinis coxendix; Seps.: Sepsis. 
Lepidoptera (1)—Nymphal.: Vanessa atalanta. 
Hemiptera (1)—Caps.: Lygus. 
Salix humilis (9:77-8).—Blooms March 18—April 28; 67 vis- 
itors observed, March 21—April 21; Mis, Y. 
On staminate flowers: 
Long-tongued Bees (3)—Nomad.: Gnathias ovatus 9, Nomada 
sayl ¢ °, Xanthidium dentariae ¢. 
Short-tongued Bees (13)—Halict. (9): Chloralictus pilosus, 
pruinosus, sparsus, zephyrus, Evylaeus foxii, Oxystoglossa confusa ; 
Andren.: Andrena illinoensis ¢, mandibularis 9, salicacea 9, type, 
sayi ¢, Trachandrena claytoniae ¢ 9, fq, hippotes 9, mariae J 9, se. 
Other Hymenoptera (1)—Chrysid.: Holochrysis hilaris. 
Diptera (4)—Syrph.: Eristalis aeneus, transversus, Ortho- 
neura nitida; Conop.: Myopa vesiculosa. 
Lepidoptera (1)—Nymphal.: Euvanessa. 
Coleoptera (2)—Coccinell.: Hippodamea parenthesis; Lampyr.: 
Ellychnia. 
Hemiptera (2)—Caps.: Lygus ab; Pentatom.: Euschistus vari- 
olarius. 
On staminate and pistillate flowers: 
Long-tongued Bees (2)—Ap.: Apis_se, ab; Megachil.: Cera- 
tosmia <. 
Short-tongued Bees (12)—Halict. (9): Chloralictus versatus, 
fq, Curtisapis forbesii, Evylaeus arcuatus se, fq, Halictus lerouxii 
ab; Collet.: Colletes inaequalis ¢ 9, ab; Andren.: Andrena earlini 
3 9, ab, erythrogastra J, erythronii ¢ 9, fq, salicis ¢ 9, se, fq, 
Opandrena eressonii 4, fq, miserabilis ¢ 9, fq, Trachandrena for- 
besii ¢ 9, fq. 
Diptera (12)—Syrph.: Brachypalpus frontosus ab, Eristalis 
dimidiatus ab, Helophilus similis ab, Sphaerophoria, Syrphus 
americanus; Tachin.: Gonia capitata ab; Sarcophag.: Cynomyia 
ab; Musc.: Phormia regina, Pseudopyrellia ab; Anthomy.: Phorbia 
platura ab; Scatophag.: Scatophaga ab; Seps.: Sepsis ab. 
Coleoptera (1)—Chrysomel.: Orsodachna ab. 
On pistillate flowers: 
Long-tongued Bees (2)—Bomb.: Bombus impatiens 9; Ceratin.: 
Ceratina “4, fq. 
