274 TRANS. ST. LOUIS ACAD. SCIFN'CE. 



cava, Schweigg. 82, p. 131 — Apis uees the perforations of Bombus 



terrestria. 

 glaijca, Pursh. 107, p. 65 — Bombus sp. 

 solida, Schweigg. 82, p. 131; 59, p. 10 — Bombus terrestris. 



Dicentra. 87, p. 42.'?. 



Canadensis, DC. 79, p. 66; 13, p. 68 — Bombus Virginiciis. 



cucullaria, DC. 58, p. 33; 14, p. 66; 107, p. 65; 79, p. 66. 



eximia, DC. 58, p. 33. 



spectabilis, DC. 82, p. 129 — Bombus Rajellus, B. pratorum, B. ter- 

 restris. The perforations used by Apis melUjica-, Megachile cen- 

 tuncnlatis and Osmia rufa. 

 Delphinium. 30, p. 114. 

 Diervilla. 5^, p. 126. 



faponica. Longitudinal slits made by Xylocopa Virginica. 

 Digitalis lutea, L. 90, p. 114 — Bombus mastruca/us, B. terrestris. 



Echium rosulatum, Lge. 63, p. 152 — Bombus terrestris. 

 Erica tetralix, L. 25, p. 426; 82, p. 353 ; 89a, p. 67. Apis and small 

 worker of Bombus terrestris. 



Fuchsia. 50, p. 126. 

 elegans, 66, p. 263. 



Galeobdolon luteum, Huds. 82, p. 313; ^9 V- 'O — Botnbus terrestris. Apis 



uses the perforations. 

 Ga'eopsis Tetrahit, L. 82, p. 314; 90, ^. t,i2 — Bombus mastrucatus, B. 



terrestris. 

 Gentiana acaulis, L. 9c, pp. 334-35; 87, p. j^ZT— Bombus mastrucatus. 



asclepiadea, L. 90, p. 337; 87, p. j^i^j— Bombus fuastrucatus. 



campestris, L. 90, p. 426 — Bombus mastrucatus. 



obtusifolia, Willd. 90, p. T,t^2,~- Bombus mastrucatus. 

 Gerardia flava, L. 6, p. 49 — Bofnbus sp. 



hevigata, Raf. 107, p. 65 — Bombus s/>. 



pedicularia, L. 25, p. 427; 3, p. 39; 4, p. 689; 98, p. 201— Bombus sp. 



purpurea, L. 107, p. 664 — Bombus sp. 



Halesia tetrap'era, L. 77, p. ^i — Bombus sp. 



Impatiens balsamina, L. 80, p. 277 — Bombus sp. 



fulva, Nutt. 112, p. 20; 54, p. 22()— Bombus Virginicus. 

 noli-tangere, L. 90, p. 179; 87, p. ^2^—Botnbu>i sp. 

 fulva, Nutt, 116, p. 100. 



Lamium album, L. 82, p. 310; 90, p. 311; 87, p. j,2^ — Bombus alticola, 

 B. 7nastrucatus,'B. terrestris. Apis gets nectar through perforations 



made by other insects, 

 maculatum, L. 82, p. 311 ; 60, p. 10^— Bombus Rajellus uses the per- 

 forations of/?, terrestris. 

 purpureum, L. 30, p. i[4; 89^, p. 47 — Bombus terrestris. 



