CHARLES ROBERTSON 181 
Other Hymenoptera (5)—Vesp.: Polistes rubiginosus ; Pompil.: 
Cryptocheilus conieus; Tenthredin.: Dolerus bicolor, Nematus 
luteotergum, vertebratus. 
Diptera (26)—Simuli.: Simulium; Syrph.: Brachyopa, Chal- 
comyia, Chrysogaster ontario, Eristalis aeneus ab, dimidiatus ab, 
Melanostoma obscurum, Orthoneura pictipennis ab, Platychirus 
hyperboreus, Psilota, Sphaerophoria, Syritta, Syrphus torvus, 
Tropidia mamillata, Xylota fraudulosa; Empid.: Empis otiosa, 
Rhamphomyia priapulus; Conop.: Myopa vesiculosa; Tachin.: 
Gonia exul; Sarcophag.: Helicobia 4-setosa; Anthomy.: Hyeto- 
dosia; Lonchae.: Lonchaea aberrans, parvicornis; Oscin.: Elachi- 
ptera costata; Sciomyz.: Sciomyza, Tetanocera; Seps.: Prochyliza. 
Coleoptera (3)—Chrysomel.: Galeruca fq, Lina ab; Oedemer.: 
Asclera puncticollis fq. 
On staminate and pistillate flowers: 
Long-tongued Bees (7)—Ap.: Apis se, ab; Ceratin.: Ceratina 
3d, fq; Megachil.: Ceratosmia ¢, ab; Nomad. (¢ 9): Gnathias cune- 
atus ab, ovatus ab, type, Nomada simplex fq, type, Phor integer 
ab, type. 
Short-tongued Bees (23)—Halict.: Agapostemon radiatus 9, 
Chloralictus pilosus 2, fq, sparsus 2, se, ab, versatus 9, fq, zephyrus 
9, ab, Curtisapis forbesii 9, sc, Evylaeus arcuatus 9, foxii 9, se, ab, 
type, Halictus lerouxii 9, fq, Paralictus platyparius ¢ 9, Seladonia 
9, fq; Sphecodini: Sphecodes arvensis 9, fq; Collet.: Colletes in- 
aequalis ¢, fq; Andren. (¢ 9): Andrena erythronii, illinoensis fq, 
type, salicis sc, ab, in cop, type, salictaria se, ab, in cop, type, 
Opandrena miserabilis ab, in cop, Parandrena ab, in cop, Trachand- 
rena claytoniae ab, forbesii fq, mariae se, ab, in cop, type, 
rugosa fq. 
Other Hymenoptera (1)—Tenthredin.: Dolerus arvensis ab. 
Diptera (14)—Syrph.: Brachypalpus frontosus ab, rileyi ab, 
Eristalis flavipes, Helophilus similis, Platychirus quadratus ab, 
Syrphus americanus ab, Xylota fraudulosa ab; Empid.: Rham- 
phomyia gilvipilosa fq, type; Conop.: Myopa pilosa fq; Tachin.: 
Gonia capitata ab; Sarcophag.: Cynomyia ab; Musc.: Pseudo- 
pyrellia ab; Anthomy.: Phorbia platura fq; Scatophag.: Seato- 
phaga ab. 
Coleoptera (1)—Chrysomel.: Orsodachna ab. 
On pistillate flowers: 
Long-tongued Bees (1)—Ceratin.: Zaodontomerus ¢, fq. 
Short-tongued Bees (6, ?)—Halict.: Chloralictus cressonii, 
pruinosus, testaceus type, Oxystoglossa pura; Sphecodini: Dre- 
panium fq; Andren.: Andrena carlini. 
