Anatomy of the Male Genital Tube in Coleoptera. 591 



piece tambour-shape with a chitinous plate (ventral plate, r^?) 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 (h) near apex, below it a small patch of hair, three 

 large diverticula, one covered with hair and a slender long diverti- 

 culum above it. Tlie opening of the duct («) is on the ventral 

 side. 



Mimcla 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. 



Oryctomorjphus variegatus. 



This is of the same type as Pelidnota, the lateral lobes being 

 consolidated on the dorsal side and the tip rounded. 



Parastasia himaculata. 



Lateral lobes joined together on dorsal side somewhat as in 

 Orydomovphus^ line of consolidation distinctly visible. Basal-piece 

 large, tambour-shape, without a ventral plate. 



Pelidnota 'punctata (PI. 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. 



Anaijlognathus aoialis and A. olivieri. 



The AnoplognatJd are recognised by the elongated lateral lobes, 

 consolidated together on the dorsal side to near their tips, the 

 ventral plate of the tegraen is also elongated and lies between the 

 lateral lobes on the ventral side, thus forming a long tube. Rejisimus 

 is of the same type but not so specialised, the lateral lobes being 

 shorter and only consolidated along their basal half. 



Bolax loestivoodi (PL XLVI fig. 24). 



Median lobe long, thin and membranous, with semi-chitinous 

 supports at the base (a). Lateral lol^es very small, free, meeting 

 at base on dorsal side but not on ventral, flattened and obtuse at 



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