Anatomy of the Male Genital Tuhc in Coleojytera. oGl 



Sagra amethystina (PI. LXXIII figs. 206, 206a). 



Median lobe well developed, chitinised, tubular and curved ; the 

 ventral edge of the median orifice projecting beyond the dorsal edge, 

 pointed but not cleft. Tliere is a very long prolongation of the 

 tegmen dorsally, and this is grooved along the middle, and has a 

 short, narrow division at tip. Internal sac not projecting beyond 

 the median foramen, which is large and occupies the ventral portion 

 of the basal half of the median lobe. Sac complex in shape, with 

 two sclerites on each side of the base (a — a) to support it ; armature 

 at apex consisting of a slender median process on which the ejacula- 

 tory duct opens, with another brush-like process above it and 

 chitinous sclerites supporting its base. 



Sagra nigrita. 



Of the same type as Sagra amethystina ; the armature at apex of 

 sac consisting of a slender process on which the ejaculatory duct 

 opens, protected by a wider and curved process above, broadened at 

 the base where it is attached to the sac ; on each side is a patch of 

 stiff hairs. 



Crioceris asimragi. 



Median lobe well developed and chitinised, with the ventral lip 

 of the median orifice projecting slightly beyond the dorsal edge ; the 

 median foramen occupying the greater part of the ventral surface 

 of the basal half. Tegmen consisting of a small Y-piece and a 

 moderate-sized strut, or keel, on ventral aspect, dorsal part entirely 

 membranous and without any trace of prolongation as cap. Internal 

 sac short with a strong chitin-piece at apex on which the ejaculatory 

 duct opens. 



La hidostomis longim cm lus. 



Median lobe forming a well chitinised, short, nearly straight tube, 

 slightly flattened on dorsal side of distal half, with the ventral edge 

 of the median orifice projecting beyond the dorsal edge ; median 

 foramen large, occupying the ventral aspect of the basal half ; a 

 slight constriction divides the basal and distal halves. Tegmen con- 

 sisting of a small shield-shaped-piece, keeled along the middle on the 

 inner side, on the ventral aspect of median lobe, without traces of 

 lateral lobes. Internal sac short, with complex chitinous armature 

 which closes the median orifice. Stenazygos excessively elongate, 

 many times longer than the whole insect. 



Clythra la&viuscula (PI. LXXIII fig. 208). 



Median lobe well developed and chitinised, forming a tube, the 



