(e.) Outer maxillæ; between which and the crest of the labrum, the orifice of the œsophagus can be obscurely seen.

(f.) Anus.

(g.) Rudimentary caudal appendages, under which is the pore leading from the vesiculæ seminales.

(h.) Posterior cirrus. (i.) Anterior cirrus.

[3.] Male of [Ibla Cumingii]; labrum and palpi, as seen with the eye on a level with the summit of the mouth.

[4.] Male of [Ibla Cumingii], Posterior cirrus (h in fig. 2) much magnified.

[5.] Male of [Ibla Cumingii], Larval antennæ; from the terminal point of the body (e in fig. 1), as seen with a 1/8th of an inch object glass.

[6.] Male of [Ibla Cumingii], Outer maxillæ.

[7.] Male of [Ibla Cumingii], Mandibles, with the underlying articulated membrane, forming the side of the mouth.