COMPOSITAE 617 



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

 stated. — 



Knuth (North Frisian Islands), a Lepidopterid, 3 Diptera, and a beetle ; (Thu- 

 ringia), the po-dvg. beetle Cetonia aurata L. MacLeod (Belgium), 2 flies (Bot. 

 Jaarb. Dodonaea, Ghent, v, 1893, P- 424)- Loew (Beriin Botanic Garden), a Muscid 

 (Echinomyia fera L.) and 2 Syrphids (Eristalis nemorum Z., and Syritta pipiens L.). 

 Scott-Elliot (Dumfriesshire), a hover-fly and a Muscid ('Flora of Dumfriesshire,' 

 p. 95). For the list given by Herm. Miiller, see pp. 613-15. 



1455- A. moschata Jacq. (Herm. MuUer, ' Alpenblumen,' pp. 426-8.) — 

 This species is gynomonoecious (in the Upper Engadine), with protandrous her- 

 maphrodite florets. The diameter of the yellow disk is 3-5 mm., that of the entire 

 head is 10-14 mm. Numerous heads are aggregated into a corymb. The 20-25 

 hermaphrodite disk-florets mature successively in centripetal order. Failing insect- 

 visitors, automatic self-pollination easily takes place, partly by the fall of pollen from 

 the papillose sweeping-hairs upon the expanded inner (stigmatic) surfaces of the stylar 

 branches, partly by the rolling back of these until the stigmatic papillae touch the 

 undivided part of the style. The plant is odorous. 



Visitors. — Herm. Miiller observed a beetle, 9 flies, 2 bees, and 10 Lepidoptera. 



1456. A. nana L. (Herm. Muller, ' Alpenblumen,' p. 428.) — The flower 

 mechanism agrees with that of A. moschata, but there are only 6-9 heads in the 

 corymb, which is 12-20 mm. in diameter. There are about 20 disk-florets, and 7-10 

 ray-florets. 



Visitors. — Herm. Muller observed 10 species of Diptera. 



1457. A. atrata L. (Herm. Miiller, 'Alpenblumen,' pp. 428-9.) — The flower 

 mechanism of this species agrees with that of A. moschata. About 50 disk-florets 

 and 9-12 ray-florets make up a head 12-18 mm. in diameter, and 3-8 heads are 

 aggregated into a corymb. 



Visitors. — Herm. Miiller observed 5 beetles, 9 flies, a Hymenopterid, and 2 

 Lepidoptera. 



1458. A. macrophylla L. (Herm. Miiller, 'Alpenblumen,' pp. 429-30.) — 

 This species is gynomonoecious, with protandrous hermaphrodite florets. Each 

 head is 10 mm. in diameter, and consists of about 20 disk-florets, and usually 5 ray- 

 florets: 6-12 heads are aggregated into a dense corymb 25-40 mm. in breadth. 

 Automatic self-pollination is easily possible. 



1459. A. coronopifolia Willd. — 



Visitors. — Loew observed the fossorial wasp Dinetus pictus F. 5 in the Berlin 

 Botanic Garden. 



1460. A. dentifera DC. — 



Visitors. — Loew observed the hover-fly Eristalis arbustorum L. in the Berlin 

 Botanic Garden. 



1461. A. filipendulina Lam. — 



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



A. Coleoptera. CoccinelUdae: i. Coccinella quattuordecimpunctata Z. 



B. Diptera, Syrphidae : 2. Syritta pipiens Z. C. Hemiptera. 3. Calocoris sp. ; 



4. Corizus parumpunctatus Schill. D. Hymenoptera. Vespidae: 5. Eumenes 



coarctatus Z. 



