320 ANGIOSPERMAEDICOTYLEDONES 



almost white ; the upright part of the corolla is violet, sometimes pale yellow. The 

 lateral lobes are sickle-shaped and grooved, and the lower one possesses a central 

 depression at its base. The three grooves converge towards the entrance to the 

 corolla-tube, and are continued into this between two hairy ridges. The front 

 margins of the two upper corolla-lobes form a kind of helmet bounding two entrances 

 to the flower : the lower, triangular one is for humble-bees, but it is so narrow that 

 a visitor of the kind is obliged to force the upper corolla-lobe upwards ; this resumes 

 its original position by the help of an elastic rib serving as a hinge. The upper 

 entrance is narrow and oblong, provided with stiff hairs directed outwards, and is 

 considered by MacLeod to be a Lepidopterid door. The style is longer than the 

 stamens, so that the stigma is touched by insect visitors before the anthers, cross- 

 pollination being therefore inevitable. Automatic self-pollination is generally ex- 

 cluded. 



Visitors. MacLeod observed 4 humble-bees. 



2386. T. canum Fisch. et Mey (= T. Chamaedrys Z., according to the Index 

 Kewensis). 



Visitors. Loew observed the following in the Berlin Botanic Garden. 



A. Diptera. Syrpht'dae: allpo-dvg. : i. Melithreptus menthastriZ.; 2. Syritta 

 pipiens Z. ; 3. Syrphus pyrastri Z. B. Hymenoptera. Apidae : 4. Anthidium 

 manicatum Z. 5 and S ; 5. Anthophora quadrimaculata F. $, skg. ; 6. Bombus 

 agrorum F. J and $, do. ; 7. B. cognatus Sleph. $, do.; 8. B. terrester Z. 5 and J, 

 do.; 9. Psithyrus rupestris F. J; 10. P. vestalis Fourcr., skg. C. Lepidoptera. 

 Rhopalocera : 11. Pieris brassicae Z. skg. 



2387. T. orientale L. 



Visitors. Morawitz observed the bee Podalirius siewersi Mor. in the Caucasus, 



2388. T. flavum L. 



Visitors. Schletterer observed the following 5 bees at Pola. 



I. Anthidium diadema Z/r.; 2. Ceratina cucurbitina ^(?jj/' ; 3. Eucera hispana 

 Lep. ; 4. Megachile argentata F. ; 5. Podalirius quadrifasciatus Vill., var. garrulus 

 Rossi. 



2389. T. Folium L. 



Visitors. Schletterer observed the following at Pola. 



Hymenoptera. (a) Apidae. i. Andrena movio Brull. ; 2. Halictus variipes 

 Mor.; 3. H. vestitus .^<?r. ; 4. Megachile sericans /cjjf. {d) Chalcididae : 5. Leu 

 caspis gigas F., not infreq. (c) Scoliidae: 6. Scolia hirta Schr.; 7. S. insubrica 

 Scop., freq. ; 8. S. quadripunctata F. ; 9. S. quinquecincta F., not infreq, {d) Sphe 

 gidae: 10. Ammophila heydeni Dahlb.\ 11. Cerceris cornigera Dahlb.; 12. SpheX; 

 maxillosus .^. {e) Vespidae: 13. Odynerus modestus S'aw. ; 14. Polistes gallica Z. ,, 



737. Blephilia Rafin. 



2390. B. hirsuta Benth. 

 Visitors. Loew (Berlin Botanic Garden) observed a bee (Apis mellifica Z) J, 



skg.) and a butterfly (Pieris brassicae Z., skg.). i 



I 



