Anatomy of the Male Genital Title in Coleoptera. 573 



Crossotarsus harhatits (PI. LXXVII fig. 228). 



Median lobe forming a strong cliitinous tube with the median orifice 

 at the apex and the median foramen occupying the ventral basal 

 third. Tegmen forming a Y-piece. Internal sac not examined. 



Family BRENTHIDAE. 



Forms examined : Baryrrliynchiis miles Boh,, India. 

 Arrhenodcs funehris Sharp, Panama. 

 Fig. 227 PI. LXXVII. 



Baryrrhynchus miles Boh. (fig. 227). 



Median lobe forming a tube for the apical two-fifths, cliitinous on 

 dorsal and ventral aspects ; the dorsal sclerite prolonged into two 

 wide struts at the base (ms). Tegmen forming a ring, with a pair 

 of large, rounded lobes, forming one piece basally, on the dorsal aspect 

 and a long -strut-like basal-piece ventrally. Internal sac long, 

 projecting beyond the base of the median lobe, and armed with a 

 long, slender, chitinous flagellum (/;/, fig. 227) about 12 mm. long, 

 and "006 mm. in diameter towards its tip ; the opening of the 

 ejaculatory duct is at the tip of the flagellum. 



We have examined various other Brenthidae, and as far 

 as we have observed, this family is very uniform, differing 

 in the size and shape of the cap-piece, of the median lobe, 

 flagellum, etc. ; but all possess the flagellum, and the 

 division of the cap-piece is never missing. In Baryr- 

 rhynchus rohvstus Jek., the lobes are slender rods, bearing 

 hairs at the tip, but are quite distinct. 



Family LUCANIDAE. 



Forms examined : Chiasognathus granti Steph., Chile. 

 Ncolamprima adolphinae Gestro, New Guinea. Lucanus 

 cervus L., England. Systenus (formerly Platycerus) cara- 

 hoides L., Bosnia. Figulus marginalis Rits., Borneo. F. 

 striatus 01., Seychelles. Syndesus cornutus Fabr., Tas- 

 mania. Ceratognathus niger Westw., Tasmania. 3fito- 

 phyllus irroratus Parry, and M. parryi Westw., New 

 Zealand. Aesalus scarahaeoides Panz., Europe. Nicagits 

 ohscurns Lee, N. America. Sinodendron cylindricum L., 

 Brockenhurst. 



Figs. 5-lOa Pis. XLII and XLIII. 



Ceratognathus niger (PL XLII fig. 5). 



The median lobe is long, tubular, with median orifice at tip and 

 TRANS. ENT. SOC. LOND. 1912. — PART III. (DEC.) C^ y 



