Anatomy of the Male Genital Tube in Coleoptera. 528 
and a basal plate with the basal angles produced into struts (b) which 
embrace the side, but are not consolidated together on the ventral 
aspect, of the median lobe. Internal sac long (the apex broken and 
not examined). 
This type approaches the Phalacridae and also the 
Erotylidae. 
Family EROTYLIDAE. 
Forms examined: JIegalodacne sp.. New Guinea; JM. 
grandis Fabr., Natal. Cypherotylus onagga var. Lac., 8. 
America. Cryptodacne vittata Broun, New Zealand. 
Camptocarpus prolongatus Crotch, Chiriqui. Doubledaya 
sp., Siam. 
Figs. 107 and 108, and 108a@ Pl. LX. 
Megalodacne sp., New Guinea. 
Has.a tubular, curved median lobe, a very large cap-piece bearing 
very small lobes. Internal sac more than twice as long as the median 
lobe with chitinous flagellum half as long as sac. 
Megalodacne grandis, Natal, is similar to the above but with 
internal sac only a little longer than median lobe and flagellum nearly 
as long as the sac. 
Cryptodacne vittata (Pl. LX figs. 108, 108~), 
Median lobe short, wide and slightly flattened ; median orifice at 
tip ; median foramen large, at base, with long strut from the dorsal 
edge of median foramen. Tegmen forming a ring, with large cap 
on dorsal aspect from the apex of which rise two short lobes. In- 
ternal sac large with armature at apex ; this armature consists of a 
curved process, chitinous on ventral and membranous on dorsal 
(b) aspect, with the opening at the tip; dorsal of this process is 
another consisting of a brush-like organ (c). 
Camptocarpus prolongatus (Pl. LX fig. 107). 
Median lobe long, thin, tubular, and curved near the base ; 
median orifice at apex, the ventral edge produced into a point ; 
median foramen at base; from the dorsal edge of the median 
foramen proceeds a long strut (ms) bifurcate at end. Internal sac 
long with a chitinous flagellum rising from apex nearly half as long 
as the sac. 
Doubledaya, sp.? (Siam) has the terminal lobes of the cap short 
(shorter than in Cryptodacne vittata, fig. 108) but the cap itself 
is rather longer. Internal sac not examined. 
