176 Trans. Acad. Sci. of St. Louis. 



indrica Say; (74) Eristalis dimidiatus Wd.; (75) E. tenax L., freq.; (76) E. 

 latifrons Lw.; (77) E- aeneusF.; (78) Helophilus similisMcq.; (79) H. lati- 

 fronsLw.; (80) Tropidia mamillata Lw. ; (81) Syritta pipiens L.; (82) Spi- 

 lomyia longicornis Lw., freq.; (83) S. quadrifasciata Say; Tachinidae: (84) 

 Gymnopareia americana Twns.; (85) Besseria atra Coq. (MS.); (86) Jurinia 

 aplcifera Wlk. ; (87) Belvosia bif asciata F. ; (88) Peleteria robusta Wd. ; (89) 

 Siphoplagia anomala Twns.; (90) Micropalpus fulgens Mg.; (91) Acroglossa 

 besperidarum Will., freq.; (92) Siphona illinoensis Twns.; Dexidae: (93) 

 Ptilodexia abdominalis Desv. ; Sarcophagidae: (94) Sarcopbaga sp. ; (95) 

 Helicobia sp.; (96) H. helicis Twns.; Muscidae: (97) Lucilia sp. ; (98) L. 

 cornicinaF.; (99) Compsomyia macellaria F.; (100) Musca domestica L.— 

 all s. or f. p. 



Lepidoptera — Bhopalocera: (101) Phyciodes tbaros Dru.; (102) Pyrameis 

 buntera F. ; (103) Thecla melinus Hon.; (104) Pieris protodice Bd.-Lec. ; 

 (105) Meganostoma caesonia Stoll; (106) Colias philodice Gdt.; (107) Pyr- 

 gus tessellata Scud.; Heterocera: (108) Scepsis fulvicollis Hbn.; (109) Feltia 

 subgotbica Stepb.; (110) Heliothis armiger Hon.; (Ill) Drasteria ericbto 

 Gn. — all s. 



Coleoptera — Lampyridae: (112) Cbauliognatbus pennsylvanicus De G.; 

 Cerambycidae: (113) Cyllene robiniae Forst. ; Chrysomelidae: (114) Diabe- 

 tica longicornis Say; Meloidae: (115) Epicauta pennsylvanica De G. — all 

 f. p. 



Hemiptera — Capsidae : (116) Lygus pratensis L., s. 



Silphium perfoliatum L. — The cup-plant is common in low 

 o-rounds along streams. The stems grow two or three metres 

 high and bear yellow heads which expand six to seven, or 

 more, centimetres. The disc florets yield nectar and pollen, 

 the ray florets being pistillate. The tubes of the disc florets 

 are rather large and measure about 5 mm. in length. This 

 secures the visits of the longer-tongued insects. The bloom- 

 ing season is from July 9th to Sept. 12th. The following 

 visitors were noted on July 23, 31, Aug. 3, 4, 9, 13, 15-17, 

 and Sept. 12: — 



Hymenoptera — Apidae: (1) Apis mellifica L. §, s. & c. p., freq.; (2) 

 Borabus americanorum F. c?§,s. & c. p.; (3) Melissodes bimaculata Lep. 

 tf, s.; (4) M. obliquaSay J 1 ?, s. & c. p. ; (5) M. agilis Cr. J>, s., freq.; (6) 

 M. perplexa Cr. ^$, s.,freq.; (7) M. dentiventris Sm. tf, s., freq.; (8) M. 

 confusa Cr. J», s. ; (9) M. coloradensis Cr. J' $ , s. & c. p. ; (10) Ceratina dupla 

 Say $, s.; (11) Megacbile petulans Cr. J\ s. ; (12) M. mendica Cr. $,s. ; 

 (13) M. brevis Say 9, s. &c. p.; (14) Epeolus concavus Cr. «^ 9 . s -; ( 15 ) 

 E. lunatus Say ^?, s.; (16) Calliopsis labrosus Rob. $, s., freq.; (17) C. 

 rugosus Rob. J*$, s.; Andrenidae: (18) Halictus lerouxii Lep. $,s.; (19) 

 H. ligatus Say 9, c. p.; (20) H. pilosus Sm. $, c. p., freq.; (21) H. con- 

 fusus Sm. $, c. p.; (22) H. stultus Cr. $, c. p., freq.; (23) Agapostemon 

 viridulaF. $, s. & c. p.; (24) A. radiatus Say $, s. & c. p.; (25) Augocblora 



