592 Mr. D. Sharp and Mr. F. Muir on the Comparative 
apex. Basal-piece very large, forming a long tube, the dorsal part 
formed by a long, curved sclerite and the ventral surface by a long 
narrow one(vp). Internal sac long, thin at apex and supported by a 
chitin strip (b). 
Fruhstorferia javana. 
At the last moment we have received an example of this 
remarkable creature. The male structures are so extraordinary 
that they may be briefly described as having the appearance of 
being crippled or deformed. The example is however so perfectly 
developed as regards its external structure that there can be little 
doubt as to the “deformity” being natural, 
The basal portion of the tambour is normal, but beyond this the 
part is twisted so that the orifice for the protrusion of the median 
lobe is placed laterally ; one of the two lateral lobes forms a very 
hard, irregular tusk, while the other is membranous, and appears to 
be merely a useless appendage. The median lobe appears also to be 
twisted and deformed at the apex, which is slender. There appears 
to be no line of demarcation between median lobe and sac, and the 
part just described may be considered to be the everted sac. In that 
case the lobe is prolonged forwards into the body far beyond the 
tambour, and is of irregular shape; distally ample, then more 
slender, and in front of this rendered a little more broad by means 
of a large horse-shoe-shaped sclerite; in front of this it is again 
more slender, and contains some apparently semi-chitinised 
structures extending to the part where it is joined to the duct. 
Obs.—The few Rutelina examined display forms that 
may be group characteristics. Anisoplia, Phyllopertha and 
Anomala have the lateral lobes free; and they are elongate 
in Anisoplia, short in Anomala. In the other forms 
(except Bolax) they are united either at the base or for 
their whole length. Anoplognathini have the cylinder 
formed by their conjunction elongated. The extraordinary 
Asiatic Fruhstorferia is quite abnormal by the distorted 
aedeagus. Bolax has a very long tubular basal-piece, with 
comparatively small, free lateral lobes, and should be 
compared with Glaphyrinae, though it is probable that the 
elongate, tubular form of the basal-piece may not be as 
important as it is remarkable. 
Hexodon wnicolor (Pl. XLVI figs. 25, 25a), 
Median lobe large and membranous, with chitinous sclerites at 
base, prolonged into median struts (ms) consolidated for the 
