varrut] © THE MECHANISMS OF FLOWERS. 283 
9; (13) Ammophila sabulosa, L.; (14) Psammophila viatica, L. ¢; (15) 
- Pompilus viaticus, L. ¢ ; (16) Priocnemis bipunctatus, F. 2 ; (17) Pr. obtusi- 
_ ventris, Schiddte, 9; (18) Ceropales maculata, F. 9; (19) C. variegata, F. 
96; (20) Tiphia femorata, F., very ab., all licking honey ; (c) Vespide: 
(28) Polistes gallica, L., and var. dindenha’: ; (d) Apide: (22) Prosopis 
| variegata, F., s.; (23) Halictus leucozonius, Schrk. ¢ ?, s. and e.p.; (24) 
H. quadricinctus, F. 2,8. ; (25) Andrena minutula, K. 92, freq., c.p. ; (26) 
Megachile lagopoda, Pz. 2, once, sucking. 
It is a remarkable fact that this scarce Umbellifer is visited by 
a choice collection of rare insects, while the most common visitants 
are absent. I do not think that this is due to a special taste of its 
honey, but I suppose that the same conditions necessary for the 
 plant’s existence are also favourable to special insects. 
_ 192. PeucEDANUM (ANETHUM) GRAVEOLENS, L.—The dirty- 
yellow flowers of this plant are, like those of Bupleurwm, visited 
by Diptera and Hymenoptera, but far more plentifully and 
i by a greater variety of forms, owing, doubtless, to the strong 
odour of the flowers. No species of beetle occurs among the very 
numerous visitors. 
_ Visitors: A. Diptera—(a) Stratiomyide: (1) Chrysomyia formosa, Scop., 
3.; (b) Bombylidw: (2) Anthrax maura, L. (Thur.); (c) Syrphide: (8) 
Cheilosia scutellata, Fallen ; (4) Syrphus pyrastri, L., sucking, as also were the 
following : (5) Eristalis arbustorum, L. ; (6) E. nemorum, L.; (7) E. sepulcralis, 
L. ; (8) E. tenax, L. ; (9) Syritta pipiens, L. ; (2) Muscide: (10) Gymnosoma 
' rotundata, L., ab. ; (11) Lucilia cornicina, F. ; (12) Musca corvina, F. ; (13) 
_ Oyrtoneura simplex, Loew., and curvipes, Macq., the last two identified by Herr 
Winnertz; (14) Sepsis, ab.; (e) Tipulide: (15) Tipula sp. B. Hymenoptera : 
(a) Tenthredinide : (16) Several species of Tenthredo ; (b) Ichneumonide : (17) 
Numerous species ; (¢) Lvaniade : (18) Foenus affectator, F. ; (19) F. jaculator, 
F. (Thur.) ; (d) Formicide: freq. ; (e) Chryside: (20) Hedychrum lucidu- 
lum, F. 2 ¢, freq. ; (21) Chrysis ignita, L. 9; (22) Chr. bidentata, L. ¢ ; 
(f) Sphegide : (23) Crabro sexcinctus, v. d. L. ¢ (Thur.); (24) Cr. vexil- 
latus, Pz. 2 (Thur.) ; (25) Cr. podagricus, H. Sch. 9 (Thur.) ; (26) Cr. denti- 
erus, H. Sch. ; (27) Cr. Wesmeeli, v. d. L. ¢; (28) Oxybelus uniglumis, L., 
b. ; (29) Tripoxylon clavicerum, v. d. L. 2; (80) Cemonus unicolor, F. 9 ; 
' (81) Tacytes pectinipes, L. 9 (Thur.) ; (32) Psen atratus, Pz. ? ¢ (Thur,) ; 
| a Pompilus cinctellus, v. d. L. 9 ; (34) P. neglectus, Wesm. @ (Thur, 
pty 14, 1870 !) ; (35) Tiphia femorata, F. ¢; (36) Myrmosa melanocephala, 
. (Thur,, July 14, 1870!) ; (g) Vespide : (37) Odynerus parietum, L. ; (38) 
0. atts, Sauss. ; (39) Eumenes pomiformis, L. ¢; (40) Polistes gallica, 
cree.) 5 ; (h) Anida: (41) Prosopis sinuata, Schenck, ¢ 2 (Thur.) ; (42) 
. communis, Nyl. 2 ¢ (Tekl. B.) ; (43) Pr. armillata, Nyl. ¢ (Tekl. B.) ; 
(a4) Sphecodes gibbus, L. ¢ 2, ab.; (45) Andrena parvula, K. ?, cp. ; (46) 
A. dorsata, K. 9, e.p. 
