Anatomy of the Male Genital Tube in Coleoptera, 533 
Family SPHINDIDAE. 
Forms examined: Sphindus dubius Gyll., Brockenhurst. 
Aspidiphorus orbiculatus Gyll., Brockenhurst. 
Fig. 1380 Pl. LXITI. 
Aspidiphorus orbiculatus (Pl. LXIII fig. 130). 
Median lobe large, cylindrical and curved, the base drawn out on 
dorsal face into a wide strut (ms), bifurcate at end ; median orifice at 
apex on dorsal face. Tegmen forming a ring with large cap on 
dorsal face ; cap curved and pointed at apex. Internal sac small, 
with armature at apex. 
In Sphindus dubius the tegmen forms a ring with a large cap- 
piece; the median lobe is produced at the base on dorsal face into a 
wide strut, bifurcate at end. Internal sac complex at apex. 
At present we can only place this form near Phalacridae, 
etc., but the association is a forced one. 
Family BOSTRICHIDAE. 
Forms examined : Apate terebrans Pall., Africa. Schis- 
toceros cornutus Pall. ( = Bostrichus migrator Sharp, teste 
Lesne), Hawaiia. 
Apate terebrans (Pl. LXIII fig. 131). 
Median lobe large and flattened horizontally with two struts at 
the base (ms) turned up and pointing distally ; median orifice near 
tip on ventral aspect ; membranous (m) at the tip on dorsal face 
along the sides, and ventrally along the middle, except round the 
median orifice. Tegmen forming a small curved plate on ventral 
aspect, with the distal corners produced into strong curved hooks 
(a) which grip the edges of the median lobe and act as a guide through 
which it moves; basally they are produced into a pair of strong 
struts (s). Internal sac undifferentiated. 
Schistoceros cornutus appears to be more simple (no description 
has however been made of it). 
Family LYCTIDAE. 
Forms examined: Lyctus canaliculatus Fabr., England. 
L. (Minthea) rugicollis Walk., Manila. T'ristaria growveller 
Reitt., Australia. 
Figs. 132:and 132a@ Pl. LXIII. 
