Anatomy of the Male Genital Tube in Coleoptera. 591 
piece tambour-shape with a chitinous plate (ventral plate, up) on 
the ventral side at the base of the lateral lobes, to which these 
are attached by membrane. Internal sac very large and complex ; 
a chitinous plate (b) near apex, below it a small patch of hair, three 
large diverticula, one covered with hair and a slender long diverti- 
culum above it. The opening of the duct (a) is on the ventral 
side. 
Mimela confucius is of the same type ; the ventral plate of the 
basal-piece more complex, being curved, and the distal end bilobed 
(or deeply emarginate) and projecting between the lateral lobes. 
Oryctomorphus variegatus. 
This is of the same type as Pelidnota, the lateral lobes being 
consolidated on the dorsal side and the tip rounded. 
Parastasia bimaculata. 
Lateral lobes joined together on dorsal side somewhat as in 
Oryctomorphus, line of consolidation distinctly visible. Basal-piece 
large, tambour-shape, without a ventral plate. 
Pelidnota punctata (Pl. XLVI fig. 23). 
Median lobe fair size, membranous, with two small chitinous strips 
at sides prolonged into two long thin median struts, Lateral lobes 
consolidated together on the dorsal side, forming a flattened plate, 
broad at the base, with a bifurcate tip; the ventral edges, even at 
base, wide apart. Basal-piece broad, flattened, tambour-shape one- 
third of length; on the ventral side there is a large chitinous plate 
(ventral plate) covering the apical half of the ventral surface of 
the basal-piece. Internal sac very large, with five short, broad 
chitinous teeth about the middle, four being of equal size, the fifth 
much larger. 
Anaplognathus analis and A. olivier. 
The Anoplognathi are recognised by the elongated lateral lobes, 
consolidated together on the dorsal side to near their tips, the 
ventral plate of the tegmen is also elongated and lies between the 
lateral lobes on the ventral side, thus forming along tube. Repsimus 
is of the same type but not so specialised, the lateral lobes being 
shorter and only consolidated along their basal half. 
Bolax westwoodi (Pl. XLVI fig. 24). 
Median lobe long, thin and membranous, with semi-chitinous 
supports at the base (a). Lateral lobes very small, free, meeting 
at base on dorsal side but not on ventral, flattened and obtuse at 
RR 2 
