588 Mr. D. Sharp and Mr. F. Muir on the Comparative 
Microplidius luctuosus (P|. XLVI fig. 22). 
Median lobe internal, fair size, membranous, except along base (a) 
where a chitinous strip runs along edge and projects as two median 
struts (ms). Lateral lobes large and curved near tips, their basal 
halves connected by membrane.  Basal-piece tambour-shape 
broader at base than at apex. Internal sac well developed 
without chitinous armature, 
Hoplia coerulea. 
Basal plate large, broad, asymmetrical ; forming a broad chitinous 
tray, very far from the tubular shape. Lateral lobes very long, 
their distal portions free; the free parts about as long as the 
parts connected by the membrane that forms the delicate cylinder 
through which the median lobe plays. The median lobe shaped 
like a long delicate finger; membranous, but at its base provided 
with a delicate, horse-shoe-shaped, semi-ring of chitin, and on 
the membrane basal to the ring, a pair of extremely fine chitin 
rods, Sac not observed. The median lobe is in this case extremely 
mobile and slips backwards and forwards to such an extent as to 
make it superficially either visible to a considerable extent, or 
apparently absent. 
Diphucephala furcata (P|. XLV figs. 21, 21a). 
Median lobe internal, large, membranous, with a thin chitinous 
support along ventral side (a) and base, continued as median struts. 
Lateral lobes consolidated together for their basal half, the distal 
portions curved downward, asymmetrical and pressed near together, 
the right tip coming to a point, the left flattened, expanded, and 
produced into two short points. Internal sac large without chitinous 
armature. Basal-piece long and tambour-shape. 
Maechidius sp. 
Median lobe medium size fairly chitinised, not extending into 
median struts. Lateral lobes large, consolidated together for about 
one-fourth from their base. Basal-piece large, chitinous on dorsal (?) 
aspect entirely membranous on ventral, and as it is remarkably flat, 
offering no protection there to the softer parts. Internal sac fairly 
large, covered with fine hair; no chitinous armature. 
Pyronota edwards. 
Basal-piece large, feebly chitinised, on one aspect, and quite 
without chitinisation on the other. Lateral lobes elongate, bent 
almost at a right angle a little distance from their base, apically 
free as far as the bend, basally from that connected by a very 
