450 A REVISION OF THE STAPHYLINID.E OF AUSTRALIA, 



This genus is composed of a small number of species and is 

 widely distributed. In fades it approaches Aleochara, but differs 

 in the arithmetic of the tarsi. 



58. SlLUSA MELANOGASTRA. 



Silusa melanogastra, Fauvel, Ann. Mus. Genov. XIII., p. 590 

 (1878). 



Crassiuscula, antice magis, postice minus attenuata, convexa, 

 nitida, rufo testacea, parum dense flavo pubescens ; antennis arti- 

 culis 5-11, abdomineque, praeter segmentorum margines, sexti 

 dimidiam partem apicalem septimumque totum, nigricantibus ; 

 antennis brevibus, incrassatis, articulis 4.° quadrato, 5-10 sensim 

 latins fortiter transversis, 11.° breviter conico : capite obsolete, 

 thorace crebre parum fortiter, elytris asperulis fortius dense, 

 abd online parcius subtiliter punctatis ; thorace fortiter transverso, 

 capite tertia parte latiore, transversim subovali, lateribus sat 

 rotunclatis, antice magis quam postice angustatis, angulis posticis 

 subrotundatis ; elytris thorace paulo latioribus et longioribus, 

 transversis ; abdominis segmentis 2-3 basi transversim profunde, 

 4-6 sensim minus impressis ; £ segmentis 6-7 supra dense granulato- 

 asperatis. Long. 2-J-2J mm. (Fvl.) 



Fernclale, South Yarra, Melbourne, Victoria ; Port Frederick, 

 Tasmania, abundant in stercore. 



59. Silusa pallens. 



Silusa 'pollens, Fauvel, Ann. Mus. Gen. XIII., p. 590 (1878). 



A praecedente magnitucline minore, forma parallela, multo 

 minus convexa, colore toto flavo, segmentis 2-6 basi vix obscuris, 

 punctura capitis thoracisque fortiore, hoc antice multo minus 

 angustato, angulis posticis subrectis, lateribus subparallelis, disco 

 subdepresso, elytris longioribus, non transversis, abdomine sub- 

 parallel o, fortius aequaliter licet parcius asperatim punctato sat 

 facile distincta. Long. 2 J mm. (Fvl.) 



Sexus differentia latet. 



Sydney, New South Wales. 



