Fig.

1. Male of _Ibla Cumingii_, magnified thirty-two times.

(_a._) Mouth.

(_b._) A slight double fold, formed by the basal edge of the
labrum, and by a lower fold, which at (_h_) becomes well
developed; the latter is a rudimentary representation of
the double membrane and valves forming the capitulum.

(_c._) Eye.

(_d, d._) Torn membrane from the sack of the female,
constricted round the body of the male.

(_e._) Terminal or basal point, with the prehensile larval
antennae, represented on rather too large a scale.

(_f._) The imbedded portion of the male.

(_g._) Two pairs of cirri.

(_h._) The fold above alluded to, concealing a small portion
of the slightly retracted thorax.

2. The male of _Ibla Cumingii_, viewed from vertically above;
magnified about sixty times. The dotted lower portion,
represents the outline of the thorax and the positions of
the cirri, which, from standing below the mouth, could not
be well seen, when the summit of the mouth was in the
proper focus.

(_a._) Labrum, largely bullate.

(_b._) Palpi.

(_c._) Mandibles.

(_d._) Maxillae.

(_e._) Outer maxillae; between which and the crest of the
labrum, the orifice of the oesophagus can be obscurely
seen.

(_f._) Anus.

(_g._) Rudimentary caudal appendages, under which is the
pore leading from the vesiculae 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 antennae; 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 maxillae.

7. Male of _Ibla Cumingii_, Mandibles, with the underlying
articulated membrane, forming the side of the mouth.

8. Male of _Ibla Cumingii_, Maxillae, with the apodeme.

9. Complemental Male of _Scalpellum vulgare_, attached over the
fold in the occludent margin of the scutum of the
hermaphrodite.

(_a._) Orifice of the sack of the male.