LABIATAE 261 



14. Osmia aenea L. 5, skg. (B.) ; 5 and S, very common, skg. and po-cltg. (H. M., 

 Strasburg); 15. O. caementaria Gerst. J, skg. (Budd.); 16. O. rufa Z. ?, do. (Budd.); 

 17. Prosopis communis Nyl. (B.); 18. Psithyrus barbutellus K. $, skg. (H. M.); 



19. Xylocopa violacea Z. J, freq., skg. (H. M., Strasburg) C. Lepidoptera. 



20. A butterfly as an unbidden guest. 



The following were recorded by the observers, and for the localities stated. 



Sprengel and Hildebrand, the honey-bee. Knuth (Kiel Ober-Realschule 

 Garden). A. Hymenoptera. Apidae: all skg. : i. Apis mellificaZ. 5; 2. Bombus 

 hortorum Z. $ and 5 ; 3' B. lapidarius Z. 5, "^ and J ; all three with a streak of pollen 

 on the back when leaving the flowers. B. Diptera. Syrphidae : 4. Syrphus pyrasti 

 Z., po-dvg. C. Lepidoptera. Rhopalocera : 5. Pieris napi Z. skg. Loew (Berlin 

 Botanic Garden), 2 bees Anthidium manicatum Z. 5, skg., and Apis meUifica Z. 5, 

 steadily skg. Rossler (Wiesbaden), the Tineid moth Coleophora ornatipennella Hb. 

 Schletterer, for Tyrol (T.) and Pola (P.), 6 bees i. Andrena limbata Ev. ; 2. Bombus 

 argillaceus Scop. (T., P.) ; 3. B. terrester Z. (T.) ; 4. Eucera longicornis Z. (T.) ; 

 5. E. (Macrocera) ruficollis Brull. ; 6. Podalirius retusus Z., var. meridionalis Per. 

 von Dalla Torre (a garden in the Tyrol), the bee Eucera longicornis Z. J. 



2250. S. Roemeriana Scheele (= S. porphyrantha Dene.). T. H. Corry says 

 that the flower mechanism of this species resembles that of S. officinalis. The lower 

 anther-lobes contain a small quantity of pollen. 



2251. S. triangularis Thunb. Hildebrand (op. cit.) states that flowers of this 

 species possess immovable connectives, stretching almost straight back and bearing: 

 a fertile anther-lobe at each end. As the two anterior ones are situated somewhat 

 in front of the entrance to the flower, and the two posterior ones rather behind it, 

 the bee, on entering the flower, first brushes against the former with its back, and 

 then the latter with its sides. In the second stage of anthesis the stigma projects 

 beyond the anterior anther-lobes, and is therefore first touched by insects. 



2252. S. tubiflora Sm. Hildebrand (op. cit.) states that in this species the 

 posterior anther-lobes are sterile, and modified into an elongated plate applied to the 

 upper lip. 



2253. S. nubia Ait. Hildebrand (op. cit.) and Correns (op. cit.) say that 

 the flower mechanism of this species agrees almost entirely with that of S. officinalis ; 

 but the two lower limbs of the connectives, though close together, are not united, so 

 that each can be separately twisted round. 



2254. S. verticillata L. (Sprengel, 'Entd. Geh.,' p. 64; Hildebrand, op, 

 cit. ; Delpino, ' Sugli appar. d. fecondaz, nelle piante autocarp.,' pp. 33-4 ; Herm. 

 Muller, 'Fertilisation,' p. 482, 'Weit. Beob.,' HI, p. 56, ' Alpenblumen,' p. 317; 

 Schulz, 'Beitrage,' I, pp. 80-1, II, pp. 129-30; Kirchner, 'Flora v. Stuttgart,' 

 p. 617; Loew, ' Bliitenbiol. Floristik,' p. 395; Correns, op. cit.) The bright violet 

 flowers of this species are partly protandrous hermaphrodite, and partly gynodioecious 

 or gynomonoecious. Their size is very variable, but definite classification into 

 groups is impossible. The upper lip of the corolla stretches straight forward, 

 narrowed and constricted below, and so joined to the tube that it can be bent 

 back, serving as a movable hood to the anthers. The connectives, however, are 

 immovably united to the filaments. The insect visitor strikes against and pushes 

 back the upper lip, so that the two upper anther-lobes are exposed and touched. 

 When the pressure caused by the visitor is removed, the parts generally resume their 



