
Vol. IV, ie 4.] Notes on the Pollination of Flowers. 225 
[N.S. 
Sonchus oleraceus, Linn. Visitors. a 
Rhopalocera (1 veris soracta, F. Moore, sh., 7,000 
ft., 17-v-06. DIPTERA, Anthomyiidae. (2) One 
species, 3,500 ft., 10-v-07. 
Sonchus arvensis, Visitor. HYMENOPTERA. 
Apidae. (1) scaler 3,800 ft., 10-v-07. 
Lactuca heyneana, D.C. Visitor. HYMENOPTERA. 
Apidae. (1) a em hemorrhoidalis, Smith, at 4,000 ft., 21- 
v-06. 
Tragopogon gracile, D.C. The tube is 5 mm. long and the 
stigmas ultimately recurve into more than a complete circle which 
should produce self- -pollination. The flowers are little visited. 
Visitor. HYMENOPTERA. Apidae. (1) Halictus duophobus, 
Bingh., 2, cp., several times, 8,500, 1-v-07. 
Pieris ovalifolia, D.Don. The mechanism was described in 
Nature of July 26, 1906, vol. Ixxiv., p. 296. shower of pollen 
falls on the visiting insect, and the most suitable of its visitors is 
Bombus hemorrhoidalis, "The visitors observed on the flowers 
were:—HYMENOPTERA. Apidae. (1) Bombus hemorrhoi- 
dalis, Smith, sh. 2) One or more species of ? Halictus, sh. 
through holes bitten in the corolla. Vespidae. (3) One 
species gee holes in the corolla. LEPIDOPTERA. Rho pa- 
locera. Pieris soracta, F. Moore, sh. (5) Pieris brassice, 
Schrank, sh. et 6,000 ft., 20-v- 06. 
Rhododendron arboreum, Sm. Visitors. HYMENO- 
PTERA. Apidae. (1) Apis indica, :Fabr., ae ft. DI- 
PTERA. Syrphidae. Pigg econ 8,000 M uscei- 
dae. (3) Luetlia sp., 8,500 ft. All 28-iv 07. On 105 ili-1902 at 
Palampur, somewhat further a (4,000 ft, ), Isaw a number of 
wasps in the flowers of this plant all more or less narcotised. 
eh Soka montana, Rorb. Visitors. HYMEN OPTERA. 
Apida (L Oalioxzys or a similar bee. espidae. 
(2) ihistisedd. one sp. Both sh., 3,500 ft., 11-v-07. 
rimula denticulata, Smith. The mechanism has been 
anata above. Visitors. HYMENOPTERA. Apidae. (1) 
Podalirius a asa Villers, sh., going from plant to Lay 
LEPIDOPTER Rhopalocera. (2) Argynnis sp., 
Both 8,700 ft., os v-07, 
Androsace rotuniifolia, Hardw. ‘he spread of the corolla 
is 8—10 mm; the tube is 2—2°5 mm. long with very little perp it 
is ventricose, 2 mm. in diameter at the mid e, an 1 mm. the 
mouth. The flower at its opening is white ; in age it Seek a 
deep rose-pink. Visitors are very rare. The anthers are situated 
