? a : rz 
192 GHYLLUS, HEMATOPUS. ~~ 
campestris, (field cricket,) wings shorter than the 
wing-cases ; body blackish ; style linear. 
Section B. .intenne filiform; feelers simple; 
tail simple; throat with a horn-hke protuber- 
ance. Grasshopper and Locust family. 
migratorius, (egyptian locust,) thorax of a single 
segment, subcarinate ; mandibles blue; body 
brown, varied with dark spots: legs blue ; hind 
thighs and shanks yellowish. 
grassus, (grasshopper,) thighs sanguineous ; wing- 
cases greenish ; antenne cylindrical. 
See Bs. P. 
4—3. Gymneteus. Spec. 1. 
cepedianus, pectoral-fins small; upper Jaw much 
extended ; teeth very small. 
See MS. P. 
4-1. Gymnotus. Spec. 9. 
electricus, (electrical eel,) naked, brown, without 
dorsal\-fin ; caudal-fin obtuse and joined to the 
anal. 3 to 6 feet long. 
See MS. P. 
8—5. Gyninus. Spec. 11. 
natator, (water-flea,) oval, black, obscurely striate. 
Plunge under water when disturbed, drawing a 
bubble resembling quicksilver in appearance. 
See MS. P. 
H. 
‘2—5. Hemarorus. Spec. 1. — 
_ estralegus, (sea-pie, oyster-catcher,) bill, eyelids 
and legs red ; body black, sometimes white be- 
neath. 3 
See MS. P. 4 
