

1889.] BOTANICAL GAZETTE. 173 



Hymenoptera — Afida: (i) Anthophora ursina Cress.? , 

 s., once ; (2) Svnhalonia honesta Cress. ? , s., once ; (3) Ce- 

 ratina dupla Say 9, s., once; (4) Osmia albiventris Cress. 

 $ 9 (=0. rustica Cress. $ ), s. and c. p., very ab. ; (5) O. at- 

 riventris Cress. 9, s. and c. p., ab. ; (6) Nomada bisignata 

 Say 9 , once. Andrenidce: (7) Andrena sp. 9 , s. and c. p., 

 once ; (8) Augochlora pura Say 9 , s. and c. p., ab. ; (9) Ha- 

 lictus coriaceus Sm.9 s. ; (10) H. fasciatus Nyl?9 , s ; (11) 

 H. pilosus Sm. 9 , s. and c. p. ; (12) H. connexus Cress. 9 , 

 s. ; (13) H. stultus Cress. 9 , s. and c. p. 



Diptera — Bom by It doe: (14) Bombylius fratellus Wied., 

 s M ab. Tachinidm: (15) Gonia frontosa Say, s., once. 



Lepidoptera — Rhoptloccra: (16) Colias philodice Godt. ; 

 (17) Nisoniades juvenalis F. ; (18) N. martialis Scud. All 

 sucked in a reversed position, except nos. 1, 14 and 16-18. 

 Paragus tibialis, Melanostoma obscurum and Mesograpta 

 marginata (Syrphidaj) eat stray pollen. 



t 



This is our 



common blue violet. The lateral petals are bearded. 1 he 

 stigma touches the bee in advance of the anthers, and cross- 

 fertilization is the natural result 

 of insect visits. The staminal 

 processes measure 3mm. and the 

 spur about 4mm. The nectar is 

 more deeply concealed than in 

 V. pubescens, and, as a conse- 

 quence, the list shows more long 



Figure 2. tongues. 



Hymenoptera — Apidce : (1) Apis mellihca L. S . once ; 

 (2) Bombus separates Cress. 9 ; (3) B. pennsylvanicus De 

 G. 9 ; (4) Svnhalonia speciosa Cress. 3 ; (5) S. honesta 

 Cress. 9 ; (6) Ceratina dupla Say 9, all sucking; (7) Os- 

 mia albiventris Cress. $ 9 , s. and c. p., ab. ; (8) O. atnven- 

 tris Cress 9 , s. and c. p., ab. ; (9) Nomada vincta Say 9 , s. 

 Andrenidce ; (10) Andrena sp. $ 9 , s. and c. p., ab. : (n) 

 Halictus sd. 9 , s. ; (12) H. fasciatus Nvl? 9 , s. 



Diptera— Bombylkhe : (13) Bombvlius fratellus Wied.,s. 



Lepidoptera— Rhofalocera : (14) Pvrameis huntera F. .: 



(15) Colias philodice Godt. ; (16). Pieris rap* L. ; (17) Ni- 

 soniades juvenalis F. ; (18) N. martialis Scud. All sucked 

 head downwards except nos. 6, 11 and 13 ; nos. 14-18 som - 

 times upright, sometimes reversing. Observed on nine days, 

 between April 9 and 29. 



