i'^l^-l \''. \i. ^'H.WKi.y : I'fis.'.atnl'ir o! I/,. \\,„hl. 17 



The species of Tnetiiomns ni.'v lie idciitilicd tliiis ; 



(The upper surface of the ceiitrnl tubeicle about twite as \ow^ as 

 broad, flat, punctured, bordered by a very distiiu-t horse-shoe- 

 shaped rid-ie which is open in front , . . . . . y. hicn.llmlus, p. I'i. 

 , , Tile upper surface of the central tuberch- rehitively broath'r as a 

 I rule. le.ss flattened, unpunetured. the nmr;;inai ridj^e often ni- 

 I distinct or absent across tlic niiihile-line behir.d as well as in 

 V front 

 ( The anterior tibiae very l)roail .. .. .. 7. ,,/„/,,,,„., „ 1,3 



" / The anterior tibiae slenderer „ 



I The anterior margin of the cantiius nieetinji the side of the head 

 at a considerable di.stjince behind the anterior anjjle ; tlie 

 externalangleofthecanthusobtu.se .. .. T. in/fjimeus. p. It]. 



^ The anterior margin of the cantiius meeting the side of the head 

 I at a very short distance behind the anterior angle ; the 

 [ external angle of the cantiius sharper .. . . T. bicK.spis n |(j 



Geims AULACOCYCLUS, Kau]). 1S68'/. p. 4. 

 Ii\(l. Taeiiio<rrn.'<[pavt]-{-Caulifer, Kaiip. 1871 ^ Trisl,„-thii.<<, Kuweit. 1896, p. 220. 

 Type. Passalus edentulus, ]\IacLeay. 826. p. 4-59. 



Aulacocyclus glabriusculus, Kuwert. 



Aulncoci/chi.i fihibriiisciihis. Kuwert. IMiT. pp. i^.sii and ■2f<'2. 



A iniiuher of specimens from .Viii Island. Length JS'4 -J""? mm. 



The aiitennal lamellae are long and slender ; the central tubercle, which closely resem- 

 bles that of A. edeiilNliis (fig. iii, 7), is erect at ba.se, oblique or almost horizontal above. 

 wlieic it is medially grooved, the apex scarcely or not at all bent downwards. The elytral 

 grooves are .shallow, and are scarcely jMinctured either above or lieluw. 



Aulacocyclus perlatus, Kaup. 



Kig. 111. 1. p. IS. 

 Aulacocyclus perlatus. Kaup, 18G8rt, p. 7. 



Four specimens from New (luinea. three of them being from Stephansort. Astrolabe Bav 

 Length i9-5-2r6mm. 



The antennal lamellae are long and slender, as in the preceding .species. The central 

 tubercle is decumbent, and more or le.ss distinctly bent downwards at the ape.x. \1| the 

 gi'ooves of the elytra are strongly punctured. 



Aulacocyclus parryi, Kaup. 



A>ilac(H-i/chis /mrri/i. Kaup. IMO.Mf;. p. ,S. 



Repre.sented by .specimens from Ceram. Ilalmalu-na (Dodinga). Ternate and Sincapore. 

 Length 2,v---5"3 """ 



The antennae and elytra resemble tho.sc of the preceding species. The central tubercle 

 resembles that of A. i/lnltrinsnihis and A. cdnitiihi.'.. but is inclined to be slightly thickened 

 on tiic under <ide jusi at the aj)c.\. izivintr it a somewhat more hooked appearance. 



D 



