Anatomy of the Male Genital Tube in Coleoptera. 541 
the tegmen is attached, the ventral edge of median orifice produced 
into a point. Tegmen long and narrow, the cap-piece being long 
and narrow, bilobed at tip. Internal sac long. 
Phiocophilus edwards (Pl. XLV fig. 144). 
Median lobe long, thin, slightly flattened, with two short median 
struts. Tegmen forming a ring with a large, flattish plate, extend- 
ing basally on the dorsal side (a). This is an abnormal type and 
at present we cannot fit it in to any of the Malacoderm group. 
The Malacodermidae consist certainly of more than one 
family, but as our review of them does not enable us to 
speak of the number or composition of the families, we 
have used the old, vague term. Some additional re- 
marks on the subject will be found under the heading 
“Taxonomy.” 
Family CLERIDAE. 
Forms examined: WNatalis porcata Fabr., Australia. 
Trogodendron fasciculatum Schr., Australia.  Cylidrus 
sp., New Guinea. 
Figs. 147, 148 and 148a Pls. LXV and LXXVI. 
Natalis porcata (Pl. LXV fig. 147). 
Median lobe long, slender and membranous, supported by a 
chitinous strip down each side. These are prolonged into a pair 
of median struts. Tegmen sheath-shape, the division between 
lateral lobes and basal-piece obliterated. Internal sac undifferen- 
tiated. 
Cylidrus sp., New Guinea. 
Median lobe short, prolonged into a pair of long median struts. 
Tegmen sheath-shape without division between lateral lobes and 
basal-piece. Internal sac undifferentiated, 
Trogodendron fasciculatum (Pl. LX VI figs. 148 and 148a). 
Median lobe well developed, the median orifice at tip on ventral 
face; a pair of median struts expanded at their ends. Tegmen 
large and forming a sheath, deeply cleft on dorsal, and slightly on 
ventral face, but no line of demarcation between lateral lobes and 
basal-piece. Internal sac undifferentiated. 
This type approaches Trogositidae. 
TRANS. ENT. SOC. LOND. 1912.—PART II. (DEC.) 0 0 
