Anatomy of the Male Genital Tube in Coleoptera. 565 
third. Tegmen V-shape. Internal sac nearly as long as the median 
lobe, bearing at its apex a curved flagellum slightly longer than 
the sac. 
Phytodecta olivacea. 
Is near to P. 5-pwnctata, but the lateral spines at the edge of the 
median orifice are greatly flattened, meet on the median ventral 
line, and curve downward, and are asymmetrical, the right one being 
produced into a short point on the outer side and the left rounded. 
Internal sac bearing a flagellum. 
Phyllodecta vitellinae (Pl. LX XIV figs. 212, 212a, 2126). 
Median lobe stout, tubular, constricted one-fourth from the 
base; the ventral edge of median orifice produced beyond the 
dorsal edge and bluntly pointed ; median foramen occupying the 
ventral aspect of the basal fourth, on the dorsal aspect of the 
base is.a deep emargination, Tegmen forming nearly a complete 
ring, but not quite complete on the dorsal face, no trace of cap- 
piece. Internal sac short, bearing armature in the shape of a 
flat, curved spine on each side (a) and a median complex plate (b). 
We have examined several of two varieties that go under this 
name, a blue variety from Forres sand-hills and a southern one, 
with a bronzy green form; in these we find a constant difference 
in the shape of the emargination on the dorsal edge of the base of 
the median lobe, the northern variety has a round emargination 
(fig. 212a) and the southern a nearly parallel-sided emargination 
(fig. 212b), More extended observations on this species are greatly 
to be desired. We think it possible that there may be two, 
Phyllodecta vulgatissima. 
This is near to P. vitellinae, but the distal end of the median 
lobe is more flattened horizontally, and the constriction near base 
is not so deep. The armature on sac is on the same plan, but 
more complex and lies inside the median orifice, and when the sac 
is slightly evaginated entirely alters the appearance of the orifice. 
Timarcha geniculata (Pl, LX XIV fig. 211). 
Median lobe well developed and chitinised, the ventral edge 
pointed and produced a little beyond the dorsal edge, the dorsal 
edge forming a pointed strip over the orifice; median foramen 
occupying the ventral aspect of the basal third, the dorsal face being 
cleft, thus making it into a pair of struts (ms). Tegmen forming a 
ring-piece with a curved plate, or cap, on dorsal aspect, shallowly 
