288 ANGIOSPERMAEDJCOTYLEDONES 



Visitors. These are rare. The following were recorded by the observers, and 

 for the localities stated. 



Herm. Miiller, 2 bees Anthophora pilipes F. J and 5, skg., and Melecta armata 

 Pz., skg. Knuth, on one occasion, the humble-bee Bombus hortorum Z. 5, skg. 

 Hoppner (Bremen), 6 bees i. Apis mellifica Z. 51 2. Bombus agrorum F. 5; 

 3. B. muscorum F. ^', 4. B. sylvarum Z. 5; 5. B. terrester Z. 5; 6. Halictus sp. 



2316. L. incisum Willd. (=L. dissectum Wtlh., L. hybridum Vtli, L. guest- 

 falicum Weihe, and, according to the Index Kewemis, L. purpureum Z.). (Herm. 

 Miiller, ' Fertilisation,' p. 498; MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, 

 P- 370.)- 



VisiTORS. Herm. Miiller observed 5 bees i. Anthophora pilipes F. 5 and J, 

 skg. ; 2. Apis mellifica Z. 5, do. ; 3. Bombus pratorum Z. 5, do. ; 4. B. rajellus 

 K. 5, do. ; 5. Halictus cylindricus F. 5, vainly skg. 



2317. L. Orvala L. (Loew, Ber. D. bot. Ges., Berlin, iv, 1886, pp. 119-20, 

 * Bliitenbiol. Floristik,' p. 311.) This species, indigenous to South Europe, Steiermark, 

 and Carniola, has been studied by Loew in the Berlin Botanic Garden. The large, 

 brown-purple flowers are over 30 mm. long, and the corolla-tube about 15 mm. in 

 length, expands into a sort of pouch (16 mm. long and 3 mm. broad) marked with 

 dark longitudinal lines. It is provided with several lateral teeth, which probably 

 serve as holdfasts for visitors; the lower lip is joined to the pouch as a sort of 

 appendage. The stigmatic branches are situated in front of the glabrous anthers, 

 which mature simultaneously, being therefore first touched by a humble-bee visitor 

 and dusted with pollen. The corolla-tube is so greatly expanded that a humble-bee 

 can insert its head and the front part of its thorax; a proboscis 15 mm. long can 

 therefore suck all the nectar. This is secreted by a nectary greatly enlarged in front, 

 and protected by a circlet of hairs. 



Visitors. Loew saw the humble-bee Bombus hortorum Z., skg. legitimately, 

 and the honey-bee, vainly skg. 



2318. L. garganicum L. (Loew, Ber. D. bot. Ges., Berlin, iv, 1886, pp. 120-1.) 

 Loew states that the flower mechanism of this species resembles that of L. Orvala, 

 but the pouch-like enlargement of the corolla-tube is much smaller, and the circlet of 

 hairs is almost or entirely absent. The stigma is situated between the anthers, while 

 the lower stigmatic branch projects below them. 



Visitors. Loew observed 7 bees in the Berlin Botanic Garden i. Anthidium 

 manicatum Z. $, skg. ; 2. Anthophora pilipes F. $ and $, do., the front of its head 

 dusted with pollen ; 3. Apis mellifica Z. 5, vainly skg., its head and thorax dusted 

 with pollen ; 4. Bombus hortorum Z. 5, skg., then going to L. Orvala ; 5. B. pra- 

 torum Z. 5) po'cltg. ; 6. Halictus sexnotatus K. 5, do.; 7. Osmia aenea Z. 5, 

 creeping far into the flowers and skg. 



2319. L. flexuosum Tenore. 



Visitors. Loew observed 6 bees in the Berlin Botanic Garden. 



I. Anthidium manicatum Z. 5 skg., J swarming round the flowers; 2. Apisi 

 mellifica Z. 5, vainly skg., its head and thorax dusted with pollen; 3. Bombus 

 hortorum Z. 5, skg. ; 4. Halictus sexnotatus K. $, po-cltg. ; 5. Osmia aenea Z. }, 

 do. ; 6. O. rufa Z. t, skg. 



2320. L. Galeobdolon Crantz (=Galeobdolon luteum Huds., and Galeopsis 



