422 CLASS VIII. 
posterior in the structure of the cells, supplied with basal cell 
resembling a right-angled triangle inverted. 
Sub-genera: Libellula, Hpitheca Cuarrent. (Libella Senys). 
Cordulia Lracu. (Hpophthalmia Burmetster, and other genera of 
Rampur ; see his Vévropteres, pp. 24—152.) 
Sp. Libellula depressa L., Rasen, Ins. 11., Ins. aquat. Cl. 11. Tab. vi. fig. 4, 
Tab. vit. fig. 3, Dumérin, Cons. g. s. l. Ins. Pl. 28, fig. 6;—Libellula 
cenea L. (Cordulia cenea), PAnzEr, Deutschl. Ins. Heft 88, Tab. 20. 
To the right-angled triangle, at the base of the fore-wings, as character 
of this genus, I directed attention in a short communication in the Bijdragen 
tot de natuurk, Wettenschappen. U1. bl. 335—339. Pl. m1., and Ann. des Se. 
nat. XV. 1823, pp. 424—427. Pl. x1. 0. 
B. Intermediate lobe of labium broader than lateral; lateral 
lobes supplied with moveable appendix at apex, sometimes com- 
posed of many joints. 
Aishna Fase. HKyes large, approximate. Ocelli often disposed 
in a transverse row. Wings expanded. 
a) With eyes contiguous. 
Sub-genera: Anaxv Leacu, “shna ejusd., Gynacantha RAMBUR. 
Sp. shna grandis, Libellula grandis L., Ra@sEL, Jns. 1. 1. Tab. tv. &e. 
b) With eyes approximate, not contiguous, or remote; with head 
transverse. 
Sub-genus: Lindenia DE Haan, V. D. Horv. (Diastatomma 
Burm. ) 
Note-—Here are to be referred sub-genera Gomphus, Cordulegas- 
ter and Petalura Leacu, and some others proposed by Rampur, op. 
cit. p. 153. 
Agrion Fasr. Eyes remote. Head transverse, much broader 
than thorax. Wings narrow, erect when the insect is seated, 
Middle lobe of labium deeply bifid. Abdomen slender, cylindrical, 
often very long. 
Sp. Agrion puella, Libellula puella L. (is a collective name for different 
European species, and thus it is arbitrary to adopt it as a synonym), Agrion 
furcatum CHARPENT.; Raset, Jns. 1. 1. Tab. x1. fig. 7;—Agrion virgo, 
Libellula virgo L., Ras. 1. 1. Tab. 1x. figs. 5, 6, &e. 
