Anatomy of the Male Genital Tube in Coleoptera, 561 
Sagra amethystina (Pl. LX XIII 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. There 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 typeas 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 asparaqi. 
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. 
Labidostomis longimainus. 
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 
forainen 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 laeviuscula (P]. LX XIII fig. 208). 
Median lobe well developed and chitinised, forming a tube, the 
