Anatomy of the Male Genital Tithe in Coleoptcra. 511 



the consolidated and reduced lateral lobes. Internal sac large, 

 swollen towards the apex where it is produced into two small 

 diverticula, between which the ejaculatory duct opens, the apical 

 dorsal part bearing spines, and a large spine on each side a third 

 from the base. 



Palimholus sp. (PI. LTI fig. 60). 



Median lobe bulbous with right edge of median orifice prolonged 

 into point ; except for a batch of membrane on dorsal side (m) the 

 median lobe is chitinous ; median foramen small, on ventral face. 

 Lateral lobes small, subcircular bodies applied closely to median 

 lobe slightly posterior of the median foramen. Internal sac well 

 developed with two chitin rods (a) supporting the ventral surface 

 and forming two rounded projections beneath the opening of the 

 ejaculatory duct. 



The few forms of Pselaphidae that we have examined 

 show very interesting differences whicli futui'e investiga- 

 tion will probably show to be characteristic of distinct 

 groups, unless connecting forms should be found. The 

 type is closely allied to the Staphylinid. The possibility 

 of Bryaxis having a true basal-piece included in the 

 aedeagus requires investigation, as the possession of such 

 a structure would prevent their being regarded as direct 

 offshoots of the Staphylinidae. 



Family SPHAERITIDAE. 



Form examined : Sphaerites glahratus Fabr., Scotland. 

 Fig. 78 PI. LV. 



Sphaerites glahratus (PI. LV figs. 78, 78a). 



Median lobe thin, only the tip visible ; median orifice at tip. 

 Lateral lobes large, consolidated together for the greater part of 

 their length on the ventral, and for half their length on the dorsal 

 face, thus forming a tube in which the median lobe lies. Basal- 

 piece small and asymmetrical, the chitinisation forming a broad 

 circular band. Internal sac undifferentiated. This is very like 

 Syntelia. 



Family SYNTELIIDAE. 

 Form examined : Syntelia histeroides, Japan. 



Syntelia histeroides (PI. LV figs. 77, 77«). 



Median lobe well developed, long, curved, tubular, with a pair of 

 median struts. Lateral lobes very long and curved towards their 



M M 2 



