526 Mr. D. Sharp and Mr. F. Muir on the Comparative 
Eumorphus, sp. aff. profani (Pl. LXI fig. 113). 
Median lobe a strongly chitinised, irregular tube with the median 
orifice at apex and the median foramen at base. On the ventral face 
of median orifice project two large spines, the smaller one nearer the 
orifice ; the orifice is closed by the folding over of a part of the 
side of the internal sac. Tegmen consists of an irregular, chitinous 
ring-piece in which there is no division between basal-piece and lateral 
lobes. Internal sac complex, consisting of a large bilobed process at 
the base of the sac, bearing several tufts of short, stout hairs, and 
a small, tubular, invaginate portion, also bearing stout hairs. 
In Ewmorphus, sp. aff. tetraspiloti, the process (a) is trilobed and 
is shown expanded in fig. 114 Pl. LXI, the tubular portion (c) being 
still invaginated and the armature at apex (b) is membranous. In 
this species there is only one spine on median lobe, but the 
projection of the lip is subspinose. 
Trochoideus desjardinsit (Pl. LXX figs. 184, 184). 
Median lobetubularwith median orifice at apex and median foramen 
at base, the ventral edge of the median orifice projecting beyond the 
dorsal edge; a deep constriction about one-third from the base. 
Internal sac small, armature not examined. Tegmen forming a 
large, nearly parallel-sided cap-piece on the dorsal aspect, the lateral 
edges curving dorsally, enveloping the sides of the median lobe, on 
the ventral face isa thin curved strut. On each side of the cap- 
piece, about one-third from its apex arise a bunch of curved hairs 
which cling together and have the appearance of being free lateral 
lobes. 
This form does not fit in with the typical Endomychids, 
and should not be associated with them. 
The Endomychidae, through Hndomychus coccineus, 
show some affinity to such forms as Mycetaca, there being 
a tendency towards the reduction of the tegmen to an 
irregular ring-piece at the base of the median lobe, and 
to a strong chitinisation of the irregular median lobe; but 
there is room for much discussion as to these Endomychid 
forms. 
Family MYCETAEIDAE. 
Form examined: Mycetaea hirta Marsh., England. 
Fig. 115 Pl. LXI. 
M. hirta (fig. 115). 
Median lobe irregularly curved, laterally flattened and expanded 
at apex, where the median orifice is situate; median foramen at 
