OF INSECTS. 289 



Kirby, loc. cit. / 10, /;) /, the upper lip, (labrum ;) 7 a, 

 the external lobe, and 7 a 6, the internal lobe of the maxillae ; 

 a x , the membranous base of the lower lip ; g o, the lower 

 lip ; g 6, the basal joint, and g c c, the outer joint of the 

 labial palpi, (outer lobes of the labrium, K. and S.) 



Fig. 6, one of the mandibles. Fig. 7, one of the maxillae, 

 destitute of maxillary palpi; a, the external lobe orgalea; 

 6, the internal lobe ; c, the stipes or stalk ; d, the cardo or 

 hinge. Fig. 8, the internal tongue (lingua.) Fig. 9, the 

 lower lip ; g a, the labium ; b 6, the basal, and c c, the 

 terminal joint of the plate-like labial palpi, according to 

 Latreille, or the lateral lobes of the labium, according to 

 Kirby. (Intr. PI. 6,/, 12, &'.) Fig. 10, one of the antennae 

 (7 jointed.) 



Figs. 11-13 represent the front of the body of the larva of the 

 same insect, to shew the construction of the mask of the face 

 and its analogous structure to the lower lip of the imago. 

 The parts are lettered as in the preceding figures. Fig. 1 1 , 

 the head, with the mask at rest and closed upon the face ; 

 4 a x , the basal portion or fulcrum (K.) by which the mask is 

 attached to the head ; g a, the lip ; g c, the lobes. Fig. 

 12, the head, with the mask in action, opened to seize the 

 prey ; lettered as above. Fig. 1 3, the mask seen from below 

 and expanded. Fig. 14, the antennae (7 jointed,) of the 

 larva. 



The abdomen of most Neuropterous insects is of 

 great length, compared with the other primary seg- 

 ments of the body. It is remarkably long and slender 

 in the genus Agrion, particularly in the South African 

 species and its allies, (A. Linear is, Fabr. Leste Lu- 

 cretia, Leach.) That of the male commonly termi- 

 nates in two or three prehensory appendages ; some- 

 times, in both sexes, in two or three long slender 

 tails or filaments; and in Panorpait ends in an arti- 

 culated tube terminating in a hook. The legs, 

 T 



