588 Mr. D. Sharp and Mr. F. Muir on the Comparative 



Microplidius luduosus (PI. XLVI fig. 22). 



Median lobe internal, fair size, membranous, except along base (o) 

 where a cbitinous 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 chitinou8 armature. 



Hoplia coerulca. 



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. 



Diiihncephnla furcata (PI. XLV figs. 21, 21ft). 



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 edwardsi. 



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 distahce from their base, apically 

 free as far as the bend, basally from that connected by a very 



