101 



of the disc of its pronotum at once separate it from all its 

 described conjjeners. 



W. Australia ; sent to me by Mr. Jung;. 



G. longiiis, sp. nov. Fem. Minus robustum ; piceum ; capita 



minus insequali sat crebre subfortiter punctulato, pone oculos 



baud tumido ; ligula in parte raediatia depressa sat opace 



coriacea et sat crebre punctulata, ad latera elevata 



(antice obtuse, postice sat anguste) obsolete sat crebre 



punctulata, partibus elevatis quoque grosse seriatim 



punctulatis ; prothorace quam longiori ut 10 ad 7 



latiori, fere ut G. longipennis, Germ, maris conformato 



(sed margin is antici parte mediana paullo magis prominenti), 



lateribus totis crebre acute crenulatis, disco leviter trans- 



versim rugato (partibus ceteris sat grosse, — quam 



G. longipenniSf Germ., multo magis fortiter, — punctulatis) ; 



elytris striatis, interstiliis subplanis (7° leviter carinato) 



biseriatim subtilius (4°, 6°, t", 9° que vix seriatim, quam 



cetera magis crebre) punctulatis. Long., 18 1.; lat., 6 1. 



Not unlike G. lotujipeniiis, Germ., but very much larger, the 



ligula totally different, the sides of the head not tumid behind 



the eyes, the sides of the prothorax strongly crenulate, the punc- 



turation of the head and pronotum much stronger, the interstices 



of the elytra flatter, and their puncturation though scarcely finer 



decidedly closer, — especially on the fourth, sixth, eighth, and 



ninth interstices. 



Central Australia (McDonnell Ranges). 

 G. longicolle, sp. nov. Fem. Minus robustum ; piceum ; capite 

 minus insequali sat crebre subfortiter punctulato, pone 

 oculos vix tumido; ligula fere ut praecedentis (G. longioris), 

 sed in parte mediana minus crebre punctulata ; prothorace 

 quam longiori ut 10 ad 7^ latiori, postice sat fortiter angus- 

 tato, sat fortiter subcrebre punctulato (disco lae^i excepto), 

 lateribus sat fortiter arcuatis minus fortiter sinuatis in 

 parte postica dimidia leviter crenulatis, margine antico in 

 medio modice prominenti, angulis anticis rotundatis posticis 

 leviter obtusis ; elytris striatis, interstitiis sat planis (7" 

 manifeste carinato excepto) regulariter sat fortiter biseriatim 

 punctulatis. Long., 17 1.; lat., 6 1. 

 The prothorax of this species is notably less strongly trans- 

 verse than that of any other Gigadema known to me and its 

 sides are less strongly sinuate in approaching the base. The 

 punctures of the elytral interstices are as strong as in the species 

 which I take to be G. Bostocki, Cast., but they are placed more 

 regularly in rows and considerably more closely than in that 

 species. 



Central Australia (Oodnadatta). 



