24 FLOWERS AND INSECTS—XXVI 
Diptera (2, f)—Syrph.: Mesogramma marginata, Sphaerophoria. 
Coleoptera (1, £)—Buprest.: Acmaeodera culta. 
ANACARDIACEAE 
Rhus canadensis (9:161-3).—Blooms April 4-May 2; 33 visi- 
tors observed, April 4-19; Mis, Y. 
Long-tongued Bees (2)—Ceratin.: Zaodontomerus ¢; Nomad.: 
Gnathias cuneatus ¢ 9, fq. 
Short-tongued Bees (21)—Halict. (2): Agapostemon texanus, 
Chloralictus cressonii, foveolatus, sparsus, zephyrus fq, Curtisapis 
forbesii fq, Evylaeus foxii fq, Odontalictus, Oxystoglossa confusa ; 
Collet.: Colletes inaequalis 4; Andren.: Andrena carlini ¢ 9, faq, 
erythrogastra ?, mandibularis ¢ 9, fq, salictaria 9, tridens J, 
Opandrena cressonii , miserabilis ¢ 9, fq, Trachandrena claytoniae 
Jb 9, ab, forbesii J 2, fq, mariae J, fq, rugosa Ji Q, ab. 
Other Hymenoptera (1)—Ichneumon: Lampronota coxalis. 
Diptera (9)—Syrph.: Eristalis dimidiatus, Syrphus americanus 
fq, ribesii; Empid.: Rhamphomyia priapulus; Tachin.: Gonia 
capitata fq; Sarcophag.: Cynomyia; Musc.: Pseudopyrellia fq; 
Lonchae.: Lonchaea aberrans; Sciomyz.: Tetanocera. 
Rhus copallina——Blooms July 19—August 10; 74 visitors ob- 
served, July 26-28; Pol (Mis), Y. 
On pistillate flowers :— 
Long-tongued Bees (8)—Ap.: Apis ab; Bomb.: Bombias separa- 
tus S$; Megachil.: Trypetini: Neotrypetes truncatus ¢; Megachilini: 
Megachile generosa ¢, mendica ¢'; Coelioxyini: Coelioxys 8-dentata 
Jo Y, sayi 3'; Eucer.: Melissodes bimaculata &. 
Short-tongued Bees (15)—Halict.: Agapostemon radiatus ¢ Q, 
Augochlora fervida <', Chloralictus pilosus ¢' 9, sparsus 9, ab, 
versatus ¢ 2, ab, zephyrus 9, fq, Halictus lerouxii ¢ 9, ab, parallelus 
3 2, Oxystoglossa confusa 9, similis ¢', Seladonia ¢ 92, ab; 
Sphecodini: Drepanium 9, Sphecodes arvensis ¢ 9, fq; Prosopid.: 
Prosopis illinoensis 9, pygmaea ¢ 9. 
Other Hymenoptera (29)—Sphec.: Ammobia ichneumonea, 
pennsylvanica, Isodontia apicalis, Sphex gracilis, nigricans, vul- 
garis; Scoli.: Elis interrupta, 5-cincta, Scolia bicincta; Philanth.: 
Cerceris fumipennis, Eucerceris, Philanthus punctatus fq, venti- 
labris; Vesp.: Polistes rubiginosus, variatus; Humen.: Leionotus 
arvensis fq, dorsalis, foraminatus fq, 4-sectus; Crabron.: Ana- 
erabro, Lindenius errans, Solenius; Oxybel.: Notoglossa americana, 
frontalis, Oxybelus packardii; Larr.: Tachytes distinectus; Pompil.: 
Arachnoproctonus, Poecilopompilus navus; Chalcid.: Leucospis. 
