Chap. XVI.] PINGUICULA LUSITANICA. 317 



of Diptera, with some Hymenoptera, Homoptera, Coleoptera, 

 and a moth ; on one leaf there were nine dead insects, besides 

 a few still alive. He also observed a few fruits of Carex 

 pulicaris, as well as the seeds of this same Pinguicula, adher- 

 ing to the leaves. I tried only two experiments with this spe- 

 cies; firstly, a fly was placed near the margin of a leaf, and 

 after 16 hrs. this was found well inflected. Secondly, several 

 small flies were placed in a row along one margin of another 

 leaf, and by the next morning this whole margin was curled 

 inwards, exactly as in the case of Pinguicula vulgaris. 



Pinguicula lusitanica. 



This 8i)ecies, of which living specimens were sent me by 

 Mr. Ralfs from Cornwall, is very distinct from the two fore- 

 going ones. The leaves are rather smaller, much more 

 transparent, and are marked with purple branching veins. 

 The margins of the leaves are much more involuted ; those of 

 the older ones extending over a third of the space between 

 the midrib and the outside. As in the two other species, the 

 glandvdar hairs consist of longer and shorter ones, and have 

 the same structure; but the glands differ in being purple, 

 and in often containing granular matter before they have 

 been excited. In the lower part of the leaf, almost half the 

 space on each side between the midrib and the margin is des- 

 titute of glands; these being replaced by long, rather stiff, 

 multicellular hairs, which intercross over the midrib. These 

 hairs perhaps serve to prevent insects from settling on this 

 part of the leaf, where there are no viscid glands by which 

 they could be caught ; but it is hardly probable that they were 

 developed for this purpose. The spiral vessels proceeding 

 from the midrib terminate at the extreme margin of the leaf 

 in spiral cells ; but these are not so well developed as in the 

 two preceding species. The flower-peduncles, sepals, and pet- 

 als, are studded with glandular hairs, like those on the leaves. 



The leaves catch many small insects, which are found 

 chiefly beneath the involuted margins, probably washed there 

 by the rain. The colour of the glands on which insects have 

 long lain is changed, being either brownish or pale purple, 

 with their contents coarsely granular so that they evidently 

 absorb matter from their prey. Leaves of the Erica ietralix. 



