OF INSECTS. 293 



the posterior ones; legs black. A native of the 

 country round New York. 



^ESHNA GRANDIS. 

 PLATE XXVIII. Fig. 1. 



Lib. Grandis, Linn. Fabr. Donovan's Brit. Ins. X. 30, PL 337, 

 fig. 2. Harris Expos. PL 12, figs. 1, 2. Roesel Insects, IV. 



THIS genus includes the largest four native dragon- 

 flies. The horizontal position of the wings, when at 

 rest, distinguishes it from Agrion, to which it is in 

 many respects very closely related, and the long 

 narrow abdomen, which never approaches to the 

 diameter of the thorax, is the most obvious distinction 

 from Libellula. The two posterior ocelli are placed 

 on a transverse ridge, and the central lobe of the 

 labium is rather large, while the two lateral ones 

 are divergent, armed with a strong tooth, and having 

 a spinous appendage attached to them. The larva 

 and nymph are more elongated than in Libellula, 

 and the structure of the mask is somewhat different. 

 About half a dozen species occur in Britain. JE. 

 grandis is two inches and a half in length, of a ful- 

 vous brown colour, with two yellow stripes on each 

 side of the thorax, the abdomen variegated with 

 green or yellow. It is of occasional occurrence on 

 moors, marshes, &c. throughout the country. 



NEMOPTERA ANGULATA, West. 



PLATE XXVII. Fig. 3. 

 Westwood ; Trans. Ent. Soc. Vol. 1, p. 75. 



OF the family Panorpidse, which contains but few 



