68 



The Botanical Gazette. 



[March, 



little longer. 



On account of later blooming, the list shows 

 >s ot the genus Melissodes and an increase in Megachile. 

 Visitors: (7 days, July 8 to 31) Hyfnenoptera— Apidae: 

 (1) Apis mellifica L. $, s. ; (2) Bombus'separatus Cr. & s. ; (3) 



B. americanorum F. $, s. ; (4) Melissodes obliqua Say $, s. ; 



(5) M. bimaculata St. Farg. $, s; (6) Ceratina dupla Say ?, s.; 



(V) Megachile rufimanus Rob 



s. and c. p. ; (9) 



M 



M 



petulans Cr. 6, s. ; (10) M. exilis Cr. 6, s. ; 

 (11) Anthidium emarginatum Say <52, s, ; (12) Andronicus 

 cylindricus Cr. ?, s. ; (13) Coclioxys 8-dentata Say $, s. ; An- 

 drcnidae: (14) Agapostemon nigricornis F. ?, s. ; (15) Augo- 

 chlora pura Say <$$, s., the male sucking through the slit in 



corolla; (16) Halictus fasciatus Nyl. $, s. ; (17) H. pilosus Sm. 

 ?, c. p. 



Lepidopterar—RAopaiocera ; (18) Lycaena comyntas Godt. ; 

 (19) Pamphila cernes Bd.-Lec. ; (20) Nisoniades juvenalis 



F. 



all s. 



Diptera — Bombylidac : (21) Systoechus vulgaris Lw., s. 



LobcliajyphiHtica L. — The large blue flowers are specially 

 adapted to bumble-bees. Delpino saw it visited by Bombus 

 italicus and B. terrestris. In this country Trelease 1 saw it 

 visited by several species of Bombus. As intruders he ob- 

 served Osmia sp. and Ceratina dupla Say ? collecting pollen. 



Visitors: (4 days, Aug. 12 to Sept. 3) Apidae: (1) Bombus 

 separatus Cr. ?, s. ; (2) B. virginicus Oliv. $. s. and c. p. ; (3) 



B^ vagans Sm. a, s. and c. p. ; (4) B. americanorum F. ?$, s., 

 ab.; Andrenidac: (5) Augochlora pura Say $; (6) Halictus 



Cr ? — both collecting pollen which they work out 



connexus 



of the anther-tube with their jaws and front feet 

 Lepidoptera 



Papilio philenor L. 



ipalo, 

 both 



(7) Danais archippus F 



(«) 



s. 



Trelease (/. c. ) saw this flower visited 



by humming-birds, Trochilus colubris L. I have never failed 

 to find them about the flowers, and there is no doubt that the 



flowers are specially adapted to them. 



The pendant lip 



shows that the flower is intended to be visited by a bird or 

 insect which is in the habit of sucking the sweets from flowers 

 without resting upon them. I have also seen the flowers vis- 

 ited by Papilio philenor L. and P. troilus L. 



On two occasions I counted five individuals of Bombus 

 americanorum F. 2, about the flowers. Sometimes 



one 



of 



JOn the fertilization of several species of Lobelia, Am. Nat. xiii 42"7~IV> 



