The _Abdomen_ consists of a number of annuli or rings, and contains the greatest part of the intestines and other viscera; being united to the trunk, and formed with holes on the sides, through which the insect breathes. The LIMBS comprehend the TAIL, LEGS, and WINGS, with their cases. The _Tail_ is placed at the extremity of the abdomen; and in some is furnished with a sting, in others it is armed with a pair of forceps; sometimes with a single bristle, sometimes with a double one; in some with a pair of claws like a crab, in others like a fork. The _Legs_ include the coxæ, trochanters, femora, tibiæ, and tarsi; the latter consisting of two, sometimes of three, four, or five articulations. In some the fore ones resemble a crab's claws. Some are furnished with spines, others are smooth and plain. The hinder ones are formed for running, leaping, or swimming. The _Wings_, being always two or four, are either plain or folded, erect or open, lying flat or inclining downwards, &c. In some they are dentated or scolloped; and some are furnished with two projections like tails. They are also membranaceous, reticulated, or transparent, and frequently adorned with beautiful colours. In some they are curiously folded within two crustaceous cases, that are either smooth or rough, striated, furrowed, punctated, &c. in some these cases are soft and flexile, in others hard like horn; the Hemipterous are partly soft and transparent, as in Plate 49. Fig. 2. and partly opake and hard, as in Plate 42. Fig. 1. Plate 43. Fig. 2. and Plate 45. Fig. 5.