Anatomy of the Male Genital Tithe in Coleoptera. 533 



Family SPHINDIDAE. 



Forms examined: S^jhtJidus dubiiis Gyll., Brockenhurst. 

 AspidvpJiorus orhiculatiis Gyll, Brockenhurst. 

 Fig. 130 PI. LXIIL 



AspidipJwo'iis orlicidatus (PI. 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 duhius 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 (PI. 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 ; membranoiis (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 

 (rt) 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 undill'erentiated. 



Schistoceros cornutus appears to be more simple (no description 

 has however been made of it). 



Family LYCTIDAE. 



Forms examined : Li/ctus canalindatus Fabr., England. 

 i. {Minthea) rugicollis Walk., Manila. Tristaria grouvellei 

 Reitt., Australia. 



Figs. 132 and 132a PL LXIII. 



