CHARLES ROBERTSON 115 
Isanthus brachiatus.—Blooms August 19—October 20; 3 vis- 
itors observed, August 29; Mi, R. 
Short-tongued Bees (3)—Halict. (2, ¢): Chloralictus pilosus, 
sparsus, versatus. 
Leonurus cardiaca (int, 14:123).—Blooms June 4—October 18; 
11 visitors observed, June 15—July 1; Ma, R. 
Long-tongued Bees (5)—Ap.: Apis ab; Bomb. (9): Bombias 
auricomus, Bombus americanorum; Ceratin.: Ceratina 9, se, fq; 
Anthophor.: Anthemoessa <. 
Short-tongued Bees (3)—Halict. (9, ¢, n): Chloralictus 
sparsus, versatus ab, Seladonia. 
Diptera (3)—Syrph. (f, n): Allograpta, Mesogramma gem- 
inata, Syrphus ribesii. 
Lycopus americanus (14: 103-4).—Blooms July 15—-September 
16; 140 visitors observed, August 13-September 7; Pol, W. 
Long-tongued Bees (13)—Ap.: Apis ab; Bomb.: Bombus 
americanorum 9, impatiens 9, fq, Psithyrus variabilis ¢; Ceratin.: 
Ceratina 9, se, fq; Megachil.: Megachilini: Megachile brevis 9, 
mendica ¢, petulans ¢'; Coelioxyini: Coelioxys germana 9; Epeol.: 
Triepeolus concolor 2; Eucer.: Melissodes comptoides ¢ 9, nivea 9, 
simillima 4. 
Short-tongued Bees (17)—Halict.: Agapostemon radiatus ¢ 9, 
Augochlora fervida ¢ ?, fq, Chloralictus sparsus 9, se, versatus 9, 
se, ab, Curtisapis coriacea ?, Halictus lerouxii 4, parallelus 4, Odon- 
talictus 9, Oxystoglossa similis 9, Seladonia ¢ 9; Prosopid.: Pro- 
sopis illinoensis 9, pygmaea 0, ziziae ¢ 9; Collet.: Colletes ameri- 
eanus J, latitarsis ¢; Panurg.: Calliopsis andreniformis 9, se, 
Perdita ¢ 9, in cop. 
Other Hymenoptera (36)—Sphec.: Ammobia ichneumonea fq, 
pennsylvanica, Isodontia apicalis, Priononyx atrata, thomae, Sceli- 
phron, Sphex gracilis, nigricans ab, pictipennis, procera; Bembic.: 
Bicyrtes ventralis, Megastizus fq, Stizus; Scoli.: Elis interrupta fq, 
5-cineta fq, Scolia bicineta; Philanth.: Eucerceris fq, Philanthus 
punctatus, ventilabris; Vesp.: Polistes annularis, pallipes, variatus, 
Vespula maculata; Eumen.: Eumenes fraternus, Leionotus for- 
aminatus, vagus; Larr.: Tachytes aurulentus, elongatus, mandi- 
bularis; Pompil.: Ceropales bipunctata, Lophopompilus philadel- 
phieus, Poecilopompilus interruptus, navus, Pompiloides margin- 
atus, Priocnemoides fulvicornis fq; Chrysid.: Hedychrum wiltii. 
Diptera (35)—Syrph.: Mesogramma marginata, Orthoneura 
nitida, Paragus bicolor, tibialis, Sphaerophoria, Syritta; Empid.: 
