Anatomy of the Male Genital Tube in Coleoptera. 549 
Blaps similis. 
Is of the same type, the median lobe being small but distinct, the 
lateral lobes small, consolidated along the basal half, thus forming a 
triangular dorsal plate, split from the apex to half way to the base. 
Cossyphus insularis (Pl. LX VIII figs. 166, 1667). 
Of the usual Tenebrionid type, but the median lobe greatly 
reduced and forming a small membranous lobe on which the median 
orifice is situated. No differentiated sac. 
Stenosis angustata (Pl. LX VIII fig. 167). 
Median lobe well developed, with two median struts. Lateral 
lobes consolidated and forming a long, narrow, nearly parallel-sided 
ventral trough in which the median lobe lies, truncate and slightly 
curved at tip. Basal-piece forming a ventral trough-shaped sclerite, 
membranous on dorsal aspect. 
The fact that the tegmen lies on the ventral aspect of the median 
lobe seems to differentiate this type from the former, but we 
here repeat that we have several times remarked as to the difficulty 
attending the orientation of the dorsal and ventral aspects of the 
aedeagus. 
Zopherosis georgvt (Pl. LX VIII fig. 168). 
Median lobe long and narrow, chitinous at tip and along the 
sides, membranous along the median dorsal and ventral portions ; 
median orifice near tip on dorsal aspect. Tegmen forming a large, 
nearly parallel-sided trough in which the median lobe lies, the distal 
half formed of the consolidated lateral lobes, truncate at tip and 
bearing fine hairs, the basal half formed of the basal-piece. 
Internal sac undifferentiated. 
This type appears to come near to Stenosis. 
Pediris sp.? (Pl. LXVIII fig. 162). 
Median lobe thin and pointed, the tip curved slightly down- 
ward, the median orifice on dorsal face near base. Lateral lobes 
long, slender, studded with small spines along the distal half with 
the tips spatulate. The lobes are quite free but their lateral 
edges touch on the dorsal face (in fig. 162 they are parted to show 
their freedom). Basal-piece large, forming a ventral sclerite with 
its lateral edges turned in, the dorsal face is membranous (mm), 
there are two sclerites in the middle of the membrane (a) whose 
distal ends are articulated to the base of the lateral lobe. 
In a similar species from the same region (Geelvink Bay) the 
