212 FLOWERS AND INSECTS—XXVI 
Thaspium aureum trifoliatum (12: 459-60).—Blooms May 13- 
July 18; 60 visitors observed, June 5-17; Mis, Y. 
Long-tongued Bees (4)—Megachil.: Trypetini: Neotrypetes 
truncatus <, Coelioxyini: Coelioxys sayi ¢'; Nomad.: Nomada den- 
ticulata 2, sayi 9. 
Short-tongued Bees (21)—Prosopid.: Prosopis crataegi 4, illi- 
noensis ¢ 9, pygmaea ¢ 9, saniculae ¢' 9, sayi ¢ 9, ab, thaspii 
2, type, ziziae ¢ 2, fq; Collet.: Colletes eulophi ¢'; Halict. (Q): 
Augochlora viridula se, Chloralictus sparsus se, tegularis se, Evy- 
laeus pectoralis sc, Halictus lerouxii, Oxystoglossa pura, similis se; 
Spheeodini: Proteraner 4; Andren.: Andrena carlini ?, Opandrena 
eressonii 9, sc, personata 0’, ziziae 9, sc, ab; Panurg.: Hetero- 
sarus §. 
Other Hymenoptera (10)—Crabron.: Pseudocrabro, Solenius; 
Sphec.: Sphex vulgaris; Humen.: Ancistrocerus unifasciatus, 
Eumenes fraternus, Leionotus foraminatus, fulvipes, scrophulariae, 
Zendalia acolhuus; Hvant.: Foenus tarsatorius. 
Diptera (20)—Empid.: Empis loripedis; Syrph.: Allograpta, 
Baccha fuscipennis, Mesogramma geminata, marginata, Paragus 
bicolor, tibialis, Sphaerophoria, Syritta, Volucella vesiculosa, Xan- 
thogramma flavipes; Conop.: Oncomyia, Zodion nanellum; Tachin.: 
Cistogaster occidua, Exorista confinis, Leskiomima prima, Siphona; 
Sarcophag.: Helicobia helicis; Musc.: Phormia regina; Seps.: 
Sepsis. 
Lepidoptera (1)—Lycaen.: Cyaniris. 
Coleoptera (2)—Cerambyc.: Euderces; Bruch.: Bruchus eruen- 
tatus. 
Hemiptera (2)—Lygae.: Lygaeus; Caps.: Lopidea. 
Zizia aurea (12:451-2, 459-60).—Blooms April 18—June 9; 
179 visitors observed, May 3-26; Mis, Y. 
Long-tongued Bees. (19)—Stelid.: Microstelis ¢, Megachil.: 
Alcidamea simplex ¢ ?, Osmia atriventris 9, se, pumila 9; Ceratin.: 
Ceratina ¢ 9, ab; Bomb. (2) : Bombias auricomus, scutellaris, sep- 
aratus, Bombus americanorum, consimilis, impatiens; Ap.: Apis sc; 
Nomad.: Centrias americanus <4, Gnathias ovatus ?, Holonomada 
affabilis 2, superba ¢ 9, Nomada denticulata ¢ 9, sayi ¢ 9; Eucer.: 
Tetralonia dilecta ¢ 9. 
Short-tongued Bees (42)—Prosopid.: (¢ 2) ; Prosopis pygmaea 
in cop, sayi, ziziae fq, type; Collet.: Colletes aestivalis ¢ 9, ab, in- 
aequalis 9; Halict. (2) : Agapostemon radiatus, Augochlora fervida, 
viridula, Chloralictus albipennis se, type, coreopsis, pilosus se, fq, 
pruinosus sc, sparsus se, fq, tegularis sc, type, versatus sc, ab, 
