UMBELLIFERAE 483 



1125. B. longifolium L. — Schulz (' Beitrage,' I, p. 46) states that in this species 

 the petals are completely involute in the bud (as in all other German species of the 

 genus), so that the nectaries are exposed. The anthers with their incurved filaments 

 are also uncovered in the bud. The petals usually remain in this condition during 

 anthesis. It is only after the anthers have dehisced that the styles develop, often very 

 slowly (as in other species), so that a considerable time often elapses between the 

 beginning of anthesis, and the accomplishment of pollinaiion. 



Only hermaphrodite flowers have been observed. 



1126. B. tenuissimum L. — According to Schulz (loc. cit.) the flower 

 mechanism of this species agrees with that of B. longifolium. 



1127. B. falcatum L. — As B. tenuissimum. The flowers are dull yellow in 

 colour. 



Visitors. — Herm. Miiller observed the following in Thuringia. — 



A. Coleoptera. MordelUdae: I. Mordella pumila Cyll., nect-lkg., very numerous. 

 B. Diptera. [a) Bombyliidae: 2. Anthrax flava,^!/^., skg. (b) Muscidae : 3. Gymno- 

 soma rotundata Z., nect-lkg., one. (c) Syrphidae: 4. Eristalis arbustorum, Z., skg. ; 

 5. Pipizella annulata Macq., do.; 6. Syritta pipiens 7.., very numerous, skg. and 

 po-dvg. C. Hymenoptera. (a) Apidae : 7. Halictus interruptus Pz., S skg. 

 [b) Ichneianonidae: 8. Various sp., skg. (c) Tettthrcdiiu'dae: 9. Hylotoma rosae Z., 

 skg. ((/) Vespidae: 10. Polistes gallica Z., skg. ; 11. P. biglumis Z., do. 



MacLeod (Pyrenees) saw 2 Hymenoptera (Bot. Jaarb. Dodonaea, Ghent, iii, 

 1891, p. 412). 



1128. B. rotundifolium L. — The flowers of this species are yellow, and their 

 nectar may be seen with the naked eye as a glistening surface. 



Visitors. — Herm. Muller gives the following list for Thuringia (■ Weit. Beob.,' I, 



P- 304)-— 



A. Diptera. {a) Muscidae : i. Sp. of Anthomyia; 2. Gymnosoma rotundata Z.; 

 3. Ulidia erythrophthalma Mg., skg. {b) Stratiomyidac : 4. Chrysomyia formosa Scop. 

 B. Coleoptera. CurcuHonidae : 5. Bruchus olivaceus Germ., nect-lkg. ; 6. Spermo- 

 phagus cardui ^Vw , do. C. Hymenoptera. (</) Ichneuvionidae : 7. Various sp. 

 \b) Ttiithredinidae : 8. A yellow sp. (c) Sphegidae : 9. Tiphia minuta v. d. Z., skg. 

 D. Lepidoptera. 10. Lycaena bellargus Rott., skg. 



340. Oenanthe L. 



1129. O. fistulosa Z. — According to Schulz ('Beitrage,' 1, pp. 47-8), this 

 species is andromonoecious, and the hermaphrodite flowers feebly protandrous. 

 Purely male stocks occur here and there. The male flowers are usually at the 

 margin, rarely in the middle of the umbellules. 



Visitors. — Herm. Muller gives the following hst (' Fertilisation,' p. 281). — 



A. Coleoptera. Scarahaeidae : i. Tricliius fasciatus Z. B. Diptera. {a) 



Empidae: 2. J^mpis livida Z. ; 3. E. rustica Fall. {It) Leptidae: 4. Atherix ibis 

 F. {c) Muscidae : 5. Sp. of Lucilia. [d) Stratiomyidai : 6. Stratiomys chamaeleon 

 Deg. (e) Syrphidae: 7. Eristalis arbustorum Z. ; 8. E. nemorumZ.; 9. E. sepul- 

 cralis Z. ; 10. Syritta pipiens Z. C. Hymenoptera. Apidae: 11. Heriades 

 truncorum Z. ?, skg. ; 12. Macropis labiata >'. $, do. ; 13. Prosopis sp. 



MacLeod (Flanders) observed a hover-fly (Bot. jaarb. Dodonaea, Ghent, vi, 

 1S94, p. 270). Schleltercr (Pola) saw the Iclmeumonid Tryphoii rutilatoi Gr. 



I i 2 



