LABIATAE 319 



Pieris brassicae L., skg., and 3 bees, skg. — i. Bombus agrorum F. 5, skg. ; 

 2. B. terrester L. S, skg.; 3. Psithyrus rupestris F. S, skg. Friese (Thuringia and 

 Hungary), the rare parasitic bee Dioxys tridentata Nyl. von Dalla Torre (Tyrol), 



3 bees — I. Bombus hortorum Z. ^ ; 2. B. variabilis Schmiedekn. (= B. tristis Seidl!), 

 very numerous ; 3. Halictus major Nyl. 5. MacLeod (Pyrenees), the humble-bee 

 Bombus agrorum F. (Bot. Jaarb. Dodonaea, Ghent, iii, 1891, p. 338). 



2382. T. montanum L. (Herm. Muller, ' Alpenblumen,' p. 311.) — The 



whitish flowers of this species are protandrous, but the movement of stamens and 

 style is still feebler than in T. Chamaedrys. A proboscis of 6 mm. long is able to 

 suck all the nectar, which is therefore accessible to the honey-bee. 



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

 stated. — 



Herm. Miiller (Alps), the honey-bee, 6 humble-bees, and a Lepidopterid. Friese 

 (Thuringia), 2 po-cltg. bees (Osmia andrenoides Spin., and O. montivaga Mor.), the 

 rare parasitic bee Stelis nasuta Llr., and the true wasp Celonites abbreviatus Vill. 

 Schmiedeknecht (Thuringia), the bee Osmia andrenoides Spin. 



2383. T. Botrys L. (Herm. Muller, ' Weit. Beob.,' Ill, p. 45 ; Kirchner, 

 ' Flora v. Stuttgart,' p. 369 ; Knuth, ' Bloemenbiol. Bijdragen.') — The flowers of this 

 species are bright purple in colour, the middle lobe of the lower lip being yellowish- 

 white with purple spots. 



In the plants I examined in the Kiel Botanic Garden (29. 8. '96) anthesis was 

 almost at an end, so that I could not observe its first stage. The stamens do not 

 bend back, for towards the end of anthesis the stigma is situated between the pairs of 

 anthers, so that pollen can fall upon it and automatic self-pollination be effected. 

 The corolla-tube is 5 mm. long and entirely enclosed in the ventricose calyx. 



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

 stated. — 



Herm. Muller (Thuringia), 2 bees, skg. — Anthidium manicatum L. S, and 

 A. punctatum Llr. S. Schletterer and von Dalla Torre (Tyrol), the bee Sphecodes 

 fuscipennis Germ. 5. 



2384. T. Scordium L. (Herm. Muller, ' Weit. Beob.,' Ill, pp. 44-5.)— The 

 corolla-tube of the strongly protandrous purple-red flowers of this species is only 



4 mm. long, and entirely surrounded by the calyx. The pointed lateral lobes (3 mm. 

 long) of the upper lip (which serves as an alighting-platform, and is 7-8 mm. long), 

 guide the proboscis of bees probing for nectar. The stamens and style project 

 obliquely upwards from the corolla-tube, in the same relative positions at first as in 

 T. Scorodonia. In the second (female) stage the stamens, however, only bend back 

 so far that the anthers are situated vertically above the slightly downwardly bent 

 stigma, when automatic self-pollination can be effected by the fall of pollen. Warnstorf 

 describes the pollen-grains as white in colour, ellipsoidal, delicately tuberculate, up to 

 56 /It long and 25 /x broad. 



Visitors. — Herm. Miiller saw 2 bees, skg. — Apis mellifica L. 5, and Saropoda 

 bimaculata Pz. 



2385. T. pyrenaicum L. (MacLeod, ' Pyreneenbl.,' pp. 63-8, Bot. Jaarb. 

 Dodonaea, Ghent, iii, 1891, pp. 338-43.) — This species bears homogamous bee 

 flowers, which possibly possess a Lepidopterid door. The lower lip is pale yellow, 



