1896] FLOWERS AND INSECTS 163 
maculata Cr., 49, freq.; Andrenid@: (3) Halictus sp. 2; (4) H. foxii Rob., 9, 
freq.; (5) H. forbesii Rob., 9, freq.; (6) H. ligatus Say, ¢; (7) H. cressonii 
Rob., 2; (8) H. zephyrus Sm., 9, freq.; (9) H. stultus Cr., 2; (10) Agaposte- 
mon texanus Cr., ¢; (11) Augochlora pura Say, 9; (12) Andrena sp. 49, 
freq.; (13) A. vicina Sm., 9, freq.; (14) A. erythrogastra Ashm., 9; (15) 
A. mandibularis Rob., 9, freq.; (16) A. illinoensis Rob., 2; (17) A. cressonii 
Rob., ¢; (18) A. bipunctata Cr., 49, freq.; (19) A. rugosa Rob., 49, ab.; (20) A. 
maria Rob., 4, freq.; (21) A. claytonia Rob., 9, ab.; (22) A. forbesii Rob., 
%; (23) Colletes ineequalis Say, ¢, freq.; Jchneumonide: (24) Lampronota 
coxalis Ashm. (MS.), 2, type. 
IPTERA— Empide : (25) Rhamphomyia priapulus Lw.; Syrphide: (26) 
Syrphus americanus W4d., freq.; (27) S. ribesii L.; (28) Eristalis dimidiatus 
Wd.; Tachinide : (29) Gonia frontosa Say, freq.; Sarphagid@ : (30) Cynomyia 
mortuorum L.; Muscidae : (31) Lucilia cornicina F., freq.; Sctamyzid@: (32) 
Tetanocera pictipes Lw.; Loncheide : (33) Lonchza polita Say —all sucking. 
On the literature of Rhus see: 
(1) Hildebrand, Geschlechtsvertheilung bei den Pflanzen 1o. 1867 — &. 
Toxicodendron, (2) Axell, Om anordningarna fiir de fanerogama vaxternas 
befruktning 47. 1869—R. Toxicodendron. (3) Delpino, Altri apparecchi 
dicogamici recentemente osservati, Nuovo Giorn. Bot. Ital. 2:52. 1870. 
(4) Miiller, Befruchtung der Blumen 157-8. 1873. (5) Delpino, Ulteriori 
osservazioni, Part II, fasc. 2 :20, 214, 300. 1875, Atti. Soc. Ital. Sci., Milano 
16 : 168. 1873; 17. 1874 (Just. 2 : 882,895). (6) Meehan, On hermaphroditism 
in Rhur cotinus and in Rhus glabra, Proc. A. A. A. S., 1873; B. 73-5. (7) 
Meehan, On self-fertilization and cross-fertilization in flowers, The Penn 
Monthly, N.1876 (Just. 4:939). (8) Miller, Das Variiren der Grosse 
gefarbter Blithenhiillen und sein Einfluss anf die Naturziichtung der Blumen, 
USMOS 2: 132-3. .1887 — R, Corinus, typhina (Just. 5: 740-1). (9) Bonnier, 
Les Nectaires, Ann. Sci. Nat. Bot. VI, 8:71. 1878 — R. Cotinus. (10) Patton, 
Observations on the genus Macropis, Am. Journ. Sci. and Arts III, 18:211, 
212. 1879 — R, &labra typhine (Just 7*:145). (11) Bontroux, Sur Vhabitat 
et la conservation des lévures spontanées, Bull. Soc. Linn. Normandie, IIT, 
6. 1881 — RZ, Cotinus (Just 13':745). (12) Miiller, Die biologische Bedeutung 
— 
161. 1883 — R, “yphina (Just 11: 476). (14) Miiller, Fertilization of Flowers, 
(15) Schulz, Beitrige Zur Kenntniss der Bestiubungseinrich- 
Kerner & Oliver 2:173, 197, 297. 1895 (Just 17°:531, 2; 18): 
er, Anacardiacee, Engler u. Prantl, Die nat. Pflanzenfam- 
3°142. 1892 [Th. III, Abth. S}-R. Cotinus (Just 20°: 481). (18). 
