320 ANGIOSPERMAE—DICOTYLEDONES 



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 May (= T. Chamaedrys Z., according to the Index 

 Kewensis). — 



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



A. Diptera. Syrphidae: all po-dvg. : 1. Melithreptus menthastriZ.; 2. Syritta 

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

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

 agrorum F. S and $, do. ; 7. B. cognatus Steph. $, do.; 8. B. terrester Z. 5 and $, 

 do.; 9. Psithyrus rupestris F. %; 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 i?oj-.r/ ; 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 mono Brull.; 2. Halictus variipes 

 Mor. ; 3. H. vestitus Mor. ; 4. Megachile sericans Fo?isc. {b) Chalcididae : 5. Leu- 

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

 &o/)., freq.; 8. S. quadripunctata Z". ; 9. S. quinquecincta Z"., not infreq. (d) Sphe- 

 •yidae: 10. Ammophila heydeni Dahlb.; 11. Cerceris cornigera Dahlb.; 12. Sphex 

 maxillosus Z'. i/) Vespidae: 13. Odynerus modestus 6'aaw. ; 14. Polistes gaUica 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.). ] 



