80 RECORDS OF THK AUSTKALIAX MUSEUM. 



The male seminal duct opens in the posterior surface of the 

 second pair of coxae, into wliicli a larg-e round aperture is cut 

 open. The aperture is tilled with a bead-like orsfan which is 

 the distal end of the seminal duct. When not entireh' con- 

 tracted, it shows, near it's top mar^-in, a transverse openinof 

 sunk between two membranaceous, lip-shaped pads. The rest 

 of the oro-a-n is protected by two chitinous plates of nearly 

 equal development which leaves between them a narrow mem- 

 bi'anaceous band ; their inner angle is rounded or cut off, and 

 their outer margins are folded back on the antei-ior surface of 

 the bead. S. JiJiid'nni^niii shows only one plate covering all the 

 proximal part of the bead, with concave anterior margin ; the 

 plate is therefore much broader than long. 



The representatives of the genus ( 'iilidsouni are confined to 

 the Australian continent and to the adjoining' southern archi- 

 pelagos. In tliis genus have been listed: — Sphii'i-otheiriim 

 (iiiffuliituiH, Butler, 1878 (Rockhampton) ; Zeplironin (lehicjii, 

 White, 1859 (New Zealand); SyluvroHierlnni Jeinsomuiii, Hutton 

 (NewZealand) ; Cyliosdiini xcuiKt^ Silvestri, 1898 (Queensland) ; 

 CyHoi^imia sfrinhifim/, Pocock, 1895 (New Zealand) ; ('ijHiixinit'i 

 titrijlniiii, Silvesti'i, 1898 ((Queensland); (' ifl insnunt iiuiiuilnr, 

 Silvestri, 1897 (Queensland). 



CyI,I(IS(iMA grKKXSI.AXIM.K, >7». //"/•. 



(Plate xiv., tigs. 1-4, tigs. 14 and 15; with Figs. 1(;--J1.) 



J : length about 22. m ni. ; breadth 10.50 to 11. ni ni. 



5 : length about 2S. ni ni. ; iu'eadtli 14 to 15 ni ni. 



Colour a unifoi'ni dark rcddisli oi' olivaceous bidwn, some- 

 times clearing up towards the anterior inaigin ol' 1 lie segments. 

 Integuments smooth, shining. 



Up])er lip densely and finely pnnctui-ed; ivst oi' the head 

 showing i-are and small dimples — or coarse punctures — provi- 

 ded at the bottom with a tiny biistle. Postei'ioi- margin 

 depressed in the middle. I'lves composed of about tliii-ty-si.K 

 lai'gei- and smallei' ocelli, of which two stand apai't l)eliind the 

 antenna on the ridge which closes theantennal fossa backwards. 

 .\iitcinne \-erv short, tapering: the sixth joint cylindrical: the 



