384 ANGIOSPERMAE—DICOTYLEDONES 



97. Cerceris arenariaZ., not infreq. ; 98. Crabro lapidarius Pz. i, skg. ; 99. Oxybelus 

 bellus Dahlh., very freq., skg.; 100. O. uniglumis Z., do.; loi. Passaloecus insignis 

 Shuck. <^,'S&.^.; 102. Psen atratus Pz., do. {g) Pompib'dae: 103. Porapilus minums 

 DaM6., skg. (h) Tenthredinidae : 104. Allanlus temulus ^Sfi?/., nect-lkg. (i)Vespidae: 

 105. Odynerus spinipes L. D. Lepidoptera. 106. Adela croessella Scop., freq., 

 skg.; 107. Dichrorampha plumbagana Tr. E. Neuroptera. 108. Agrion settled 

 on the flowers not infrequently, apparently only to sun itself; 109. Panorpa com- 

 munis Z., nect-lkg. F. Orthoptera. no. Ectobia lapponica Z., nect-lkg. (.''). 



Loew observed the following on S. salicifolia in Silesia (' Beitrage,' p. 30). — 



A. Coleoptera. (a) Malacodennaia : i. Dasytes flavipes F., nect-lkg. (d) Nili- 

 dulidae: 2. Meligethes sp. B. Hymenoptera. Vespidae: 3. Odynerus sinuatus 

 F. $, skg. 



Schenck noticed the bee Andrena gwynana K. in Nassau. 



H. de Vries records a bee (Apis mellifica Z. 5) and a humble-bee (Bombus 

 terrester Z. t) for the Netherlands (Ned. Kruidk. Arch., Nijmegen, 2. ser., 2. deel, 

 1875)- 



919. S. opulifolia L. — F. Ludwig expresses the opinion (Kosmos, Stuttgart, 

 xvii, 1885, p. 203) that the red colour assumed by the ovary in this species after the 

 flower has faded ser\-es to keep away unbidden guests from blossoms that are 

 still fresh and retain their original hue. 



Visitors. — Alfken observed 2 bees (Prosopis communis Nyl. S, and Andrena 

 albicans Mull. $) at Bremen ; and F. F. Kohl saw a wasp (Odynerus oviventris 

 Wesm.) in the Tyrol. 



920. S. digitata Willd.— 



Visitors. — Loew observed the following in the Berlin Botanic Garden. — 

 A. Coleoptera. Scarabaeidae: 1. Cetonia aurata Z., freq., dvg. the flowers; 

 2. Phyllopertha horticola Z., do. B. Diptera. Syrphidae : 3. Eristalis nemorum Z., 

 po-dvg. C. Hymenoptera. Apidae : 4. Apis mellifica Z. 5, po-cltg. 



259. Aruncus L. 



Yellowish-white dioecious pollen flowers, devoid of nectar, and aggregated into 

 large inflorescences. 



921. A. sylvestris Kostel. ( = Spiraea Aruncus Z.). (Herm. MuUer, 'Fertilisa- 

 tion,' p. 224.) — The flowers of this species are polygamous-dioecious. Kerner 

 says : — ' It produces true hermaphrodite flowers and pseudo-hermaphrodite male and 

 female flowers. The three kinds of flowers are arranged thus: (i) some plants 

 bear only pseudo-hermaphrodite female flowers, (2) others only pseudo-hermaphrodite 

 male flowers, (3) some bear both hermaphrodite flowers and pseudo-hermaphrodiie 

 male flowers, and (4) in addition there are yet other plants whose flowers are all 

 hermaphrodite' (' Nat. Hist. PI.,' Eng. Ed. i, II, p. 300). 



Visitors. — Herm. Miiller (loc. cit., and •' Weit. Beob.,' II, p. 243) gives the 

 following list. — 



A. Coleoptera. (<{) Dcnnestidae: i. Anthrenus claviger Z";-., occasional ; 2. A. 

 muscorum Z. ; 3. A. pimpinellae F., very freq.; 4. A. scrophulariae Z., not infreq. ; 

 5. Attagenus schaefferi Hbst. (b) Nitidulidae: 6. Meligethes freq. B. Diptera. 

 (a) Muscidae: 7. Sp. of Anthomyia, po-dvg. (li) Syrphidae: 8. Syritta pipiens /,., 

 very freq., po-dvg. C. Hymenoptera. (<?) Apidae : 9. Prosopis armillata Nyl. ; 



