COMPOSITAE 



625 



1476. T. atratum Sch. Bip. (= Chrysanthemum atratum/a^., and C. coronopi- 

 folium Vill.). (Herm. Miiller, 'Alpenblumen,' p. 432.) 



The flower mechanism of this species agrees completely with that of the 

 last one. 



Visitors. Herm. Miiller observed 7 flies. 



1477. T. macrophyllum Sch. Bip. (= Chrysanthemum macrophyllum Waldst. 

 et Kit., and Pyrethrum macrophyllum Willd.). 



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



A. Coleoptera. (a) 



Dermestidae: 1. Anthrenus 

 scrophulariae L. (b) Sca- 

 rabaeidae : 2. Cetonia 

 aurata L., freq. B. Di- 

 ptera. Muscidae : 3. Lu- 

 cilia caesar L. C. Hy- 

 menoptera. (a) Apidae : 

 4. Apis mellifica L. ijj, skg. 

 and po-cltg.; 5. Prosopis 

 communis Nyl. $, skg. 

 (b) Vespidae : 6. Odynerus 

 parietum L. 



1478. T. partheni- 

 folium Sch. Bip., var. 

 pulverulentum ( = Chry s- 

 anthemum praealtum Vent. 

 and Pyrethrum partheni- 

 folium Willd.). 



Visitors. Loew ob- 

 served a Muscid (Ocyptera 

 brassicaria F.), a Syrphid 

 (Syritta pipiens Z.), and a 

 bug (Heriades truncorum 

 L. 5) in the Berlin Botanic 

 Garden. 



Fig. 201. Tanacetum alpinunt, Sch. Bip. (after Herm. Miiller). 

 A. A head (natural size). B. Disk-floret in the first (male) stage (X 7). 

 C. Do. in the second (female) stage (x 7). D. Do. in section; the 

 ovary omitted ( x 7). E. Ray-floret ( x 7). F. Pollen-grain, a, anther- 

 cylinder; ca, calyx; co, corolla; _/?, filaments; n, nectary; ov, ovary; 

 po, pollen ; st, stylar branches. 



1479. T. Meyerianum Sch. Bip. (=Pyrethrum tanacetoides DC). 



Visitors. Loew saw a beetle (Coccinella bipunctata L.) in the Berlin Botanic 

 Garden. 



457. Chrysanthemum L. 



Ray-florets yellow or white in colour ; otherwise as Anthemis. 



1480. C. segetum L. (Knuth, 'Bl. u. Insekt. a. d. nordfr. Ins.' pp. 91-3, 

 159.) The diameter of the golden-yellow heads of this species is 4-5 cm., of 

 which a third is occupied by the disk. The 12-16 ray-florets are female: the 

 stigma projects a little from the corolla-tube, which is 4 mm. long. The tongue 

 is almost at right angles to this tube ; its length is 1^-2 cm. and its breadth 



DAVIS. II S S 



