CHAT. XVI. TINGUICULA LUSITANICA. 391 



insects and fragments of insects adhering to almost all 

 the leaves. These consisted chiefly 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 puliearis, as well as the seeds of this same 

 Pinguicula, adhering to the leaves. I tried only two 

 experiments with this species ; 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 Pinguicala vulgaris. 



PINGUICULA LUSITANICA. 



This species, of which living specimens were sent me 

 by Mr. Ealfs from Cornwall, is very distinct from the 

 two foregoing 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 glandular 

 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 

 margin is destitute 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 pro- 

 20 



