OF INSECTS. 291 



vertex, with an ocellus on each side of it, and an- 

 other of larger size in front ; the central lobe of the 

 labium much smaller than the lateral ones ; abdomen 

 as broad as the thorax, or nearly so. Larva and 

 nymph aquatic, the body short and rather thick, 

 with five appendages at the hinder extremity ; re- 

 spiration through the tail. 



LIBELLULA QUADRIMACULATA. 



PLATE XXVII. Fig. 1. 



Linn. Donovan's Brit. Ins. XI. PI. 407. Samouelltfs Compen- 

 dium, PI. 7, fig. 1. 



WE give this as a British example of the genus; 

 besides it, about eight others are found in this coun- 

 try. It is not one of the largest size, its dimensions 

 scarcely equalling those of the more common L. 

 depressa. The general colour is reddish brown, the 

 wings transparent, and each of them with a large 

 brown patch at the base, and another of smaller size 

 beyond the middle. This species was long regarded 

 as rare, but since the investigation of our indigenous 

 insects came to be more attended to, it has been 

 found not unfrequently in nearly all parts of the 

 country. In the neighbourhood of Edinburgh it 

 occurs at Duddingston Loch, among the Pentland 

 Hills, and elsewhere. 



LIBELLULA PORTIA. 



PLATE XXVII. Fig. 2. 



Drury\ Ex. Ins. II. PI. 47, fig. 3. L. Marginata, Fdbr.Ent.Syst. 



THIS small and finely coloured species is a native of 



