LEGUMINOSAE 



295 



MacLeod saw the bee Halictus flavipes F. 5, in Flanders (Bot. Jaarb. Dodonaea, 

 Ghent, vi, 1894, p. 350). 



In Dumfriesshire a humble-bee and 2 hover-flies have been recorded (Scott- 

 Elliot, 'Flora of Dumfriesshire,' p. 45). 



695. T. nigrescens Viv. — 



Visitors. — Schletterer noticed the following bees at Pola. — 

 I. Andrena flavipes Pz.; 2. A. lucens Imh.; 3. A. parvula K.; 4. Eucera 

 parvula Friese, very frequent ; 5. Halictus interruptus Pz. ; 6. H. levigatus K. 5 ; 

 7. H. variipes Mor.; 8. Megachile argentata F.; 9. M. muraria L.; 10. Osmia 

 gallarum Spin. ; 1 1. O. tridentata Du/. el P&. ; 12. O. versicolor Ltr. 



696. T. parviflortun Ehrh. — 



Visitors. — Schletterer observed the bee Halictus variipes Mor. at Pola. 



697. T. alpinum L. (Herm. Miiller, ' Alpenblumen,' pp. 240-1.) — In this 

 species the expanded base of the vexillum surrounds the inner parts of the flower for 

 a length of about 10 mm., 



so that among all the 

 Alpine Hymenoptera only 

 humble-bees can reach the 

 nectar. 



Visitors. — Herm. 

 Miiller observed in the 

 Alps 8 species of humble- 

 bee, nect-skg. or po-cltg. 

 (besides Bombus terrester 

 L. as a nectar-thief), and 

 4 species of Lepidoptera 

 skg. or attempting to suck. 



Loew noticed the 

 following in Switzerland 

 ('Beilrage,' p. 62). — 



A. Hymenoptera. 



Apidae : i . Bombus alti- 

 cola Kriechb. 5, skg.; 2. 

 B. mucidus Gerst. 5, do. ; 

 3. B. rajellus K. 5, do.; 



Fig. 94. Trifoliuni alpinum, L. (after Herm, Miiller). A. Flower 

 seen from below {X3^). B. The same, after removal of the calj'x and 

 vexillum ; seen from above : d, alar claw. C Anterior part of the same 

 flower, after removal of the right ala, and depression of the carina and leJt 

 ala ; seen from the side, d, claw of the carina ; ca, calyx ; yj vexillum ; 

 7?, alae ; sch, carina ; h, nectar-passage ; a, anthers ; b, upper free filament ; 

 c, fused filaments ; st, stigma ; x, point where the right carinal petal is 

 connected with the right ala. 



4. Halictus xanthopus K. 5, po-cltg. B. Lepidoptera. 



Rhopalocera : 5. Lycaena sp. 



698. T. pallescens Schreb. (Herm. MuUer, 'Alpenblumen,' pp. 244-6.) — 

 As the calyx-tube in this species is only i mm. long, and the length up to the tip 

 of the carina only 4-5 mm., the nectar concealed in the base of the flower is 

 accessible even to short-tongued bees. The flower mechanism agrees with that of 

 T. repens. Automatic self-pollination is easily effected (see Fig. 95). 



Visitors. — Loew observed a short-tongued bee (Andrena) in the Alps (' Beitrage,' 

 p. 63). Herm. Miiller, besides the honey-bee and 6 species of humble-bee, also 

 saw 8 species of nect-skg. Lepidoptera. 



