Anatomy of the Male Genital Tube in Coleoptera. 545 



abnormal family by the aid of some of the larger and less 

 delicate exotic forms, of which we should be very glad to 

 receive examples. 



Family RHIPICERIDAE. 



Form examined : CallirrJiipis philiherti, Seychelles. 

 Fig. 153 PI. LXVI. 



Callirrhipis philiberti (figs. 153, 153a). 



Median lobe large, formed by a large sclerite («) on dorsal face, 

 narrow at apex which is slightly cleft, widening towards the base, 

 which is continued into two median struts, and a slender chitin rod (b) 

 on the ventral face, the sides being membranous. Lateral lobes large, 

 pointed at apex, and widening at base where they consolidate together 

 on the ventral face and just touch on the dorsal. Basal-piece large 

 membranous on dorsal aspect and in the centre of ventral 

 aspect and with a chitinous support round the ventral. Internal 

 sac undifferentiated, but the duct is greatly enlarged just beyond 

 the aedeagus (ej). 



This is an Elaterid type. 



Family ELATERIDAE. 



Forms examined : Agrypnus sp. ? New Guinea. Ani- 

 somerus hacquarti, Mashonaland. Chalcohpidius alheo'tisi 

 Cand., Honolulu. 



Figs. 154, 155 and 156 Pis. LXVI and LXVII. 



Agrypnus sp. ? (Pi. LXVI fig. 154). 



Median lobe formed by a broad sclerite (a) on dorsal face pointed at 

 tip, and with two struts at base, and a small chitin rod (h) on ventral 

 face, the sides membranous ; median orifice large, on ventral aspect 

 near tip. Lateral lobes large, enveloping the median lobe. Basal- 

 piece well developed, membranous on dorsal face, and in centre 

 on ventral face {m) with chitin {hp) round the edges. Internal sac 

 undifferentiated, with dilated duct basal to aedeagus. 



Anisomerus hacquarti (PI. LXVII figs. 155 and 155a). 



Asymmetrical trilobe form. Median lobe small, with median orifice 

 at tip and two small struts at base. Lateral lobes large, the right longer 

 and broader than left, consolidated at their basal part into a tube. 

 Basal-piece very small. Internal sac undifferentiated, the duct 

 dilated basal to the aedeagus. 



