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INSECTA. 44] 
Sp. Belostoma grande, Nepa grandis L., Rasen, Zns. ut. Tab. 26, from 
South America; Belostoma indicum LE PretierR et Serv., Srorn, 
Wantzen, Pl. vu. fig. 4, from the West Indies. The largest species of this 
order. The stiliform appendage at the abdomen is not, according to 
Sprnoua, for respiration, and thus does not correspond to the filaments at 
the abdomen of Nepa, GuERIN, Revue zoologique, 1839, Avril, p. 112. 
Note.—Sub-genera Diplonychus and Spherodema Laporte are 
scarcely distinct. 
Sp. Belostoma rusticum, Nepa rustica FaBr., STOLL, Wantzen, Pl. vit. fig. vi. 
The females carry the eggs on their back, like Pipe amongst the 
Batrachoidea. 
Nepa mihi (Nepa and Ranatra Fapr.) Antenne triarticulate. 
All the tarsi with only one distinct joint. Abdomen provided with 
respiratory appendage formed of two sete. 
* Body oval, depressed. 
Sub-genus Vepa Fasr., Larr. 
Sp. Nepa cinerea L., SWAMMERDAM, Bibl. nat. Tab. m1. fig. 4; Rasen, ns. 
11. Tab. 22; SCHELLENBERG, Cimic. Tab. x1v.; Dummir. Cons. gén. s. 1. Ins. 
Pl. 37, fig._2; Waterscorpion, very common with us in ditches and fish- 
ponds; the eggs, already described and figured by SWAMMERDAM, have 
seven threads at the end, which cause them to resemble the plumed seeds of 
Syngeniste. 
** Body slender, elongate. 
Sub-genus Ranatra Fasr., Late. 
Sp. Nepa linearis L., SWAMMERDAM, 1.1. fig. 9; Rasex, Jns. 1. Tab. 23, 
&e. ; rarer than the former species. 
II. Ocelli two. 
Galgulus Larr. Ocelli two, frontal. 
Sp. Galgulus oculatus, Naucoris oculata Fasr., Cuvier, R. Ani. éd. illust., 
Ins. Pl. 93, fig. 4. 
Mononyx LAPORTE. 
Pelogonus LAtR. Rostrum elongate, with sheath triarticulate, 
second joint long. Ocelli in vertex. 
Sp. Pelogonus marginatus LatR., GeRMAR, Faun. Ins. Europ. Fase. xt. 
Tab. 23; Cuv. R. Ani. éd. ill. Pl. 93, fig. 3; on the coasts of the south of 
France and of Spain. This genus makes the transition to Sal/da, but can 
scarcely, on account of the insertion and the shortness of the antennz, be 
placed elsewhere than in this family. 
