[2131] Surely these Epeiræ, of so different a habit from the rest, form a distinct genus?

[2132] See above, p. [339].

[2133] There is reason to suppose that in Chelonus and the Chrysidæ several segments are retracted within the abdomen, and if the cavity of its under side in the latter be examined, it will be discovered that the epigastrium is divided in the middle into two pieces, and that both the sides of this and the following segments are covered by three narrow accessory plates, one to each, the last being the shortest. De Geer (ii. 833.) describes Chrysis ignita as having four abdominal rings; but this is only in appearance, there being really only three. This appearance is produced by the apex of the last dorsal segment being more depressed and marked with several deep little excavations that look like holes. In some species of Stilbum this segment consists as it were of three ridges or steps.

[2134] In this genus the ventral segments are replaced by a long narrow central plate, succeeded by a minute one.

[2135] In this genus the bed of the posterior coxæ appears to consist of two segments, which are beautifully fringed with parallel short bristles.

[2136] Anatom. Compar. i. 451.

[2137] Plate [VIII.] Fig. 9. A´´, B´.

[2138] [Ibid.] Fig. 5. A´´.

[2139] Plate [XV.] Fig. 10.

[2140] Reaum. v. t. xvii. f. 14. a. a.