70 TASMANIAN CICADID.E, 



D. tiUyardi is a slightly smaller race on the average- 

 than D. hirsutus, and can be easily distinguished by me 

 triangular spot on the me&onotum, the black apical mar- 

 gins of the anal area, and the opercula bordered yellowish 

 apically. 



Key to tht Taamanian Gicadida^.. 



This key is compiled, mainly from Distant's catalogue 

 and keys, and to help in the identification of the species 

 the sizes are included together with such points as may 

 readily determine the insect. 



Those species marked with an asterisk are represented 

 in my collection by Tasmanian specimens, the majority of 

 the others are represented by specimens from the main- 

 land. 



I am not satisfied that M. sjjreta, G. & F., is distinct 

 from, if. torrida, Er., a very variable species. Mr. Cole 

 has a specimen of torrida without the lateral tooth of the 

 pronotum. I consider that if a male torrida can be 

 found with an abdomen to- coriespond with the abdomev 

 of spreta, then spreta should be sunk to synonomy. 



1. Tympanal coverings present. (Subf. Ciradince) 2 

 Tvmpanal coverings absent. (Subf. Tihicince) 3 



2. The onl}' representative or this subfamily in 



Tasmania is the large Uarl- cicada ; length 

 35 mm. or more; expanse 100 mm. or more. 

 (Only knoAvn to me from Launcestoii.) 



*PsaItoda mnerens, Germ. 



3. Pronotum verj^ large, produ.^ed posteriorly and 



almost covering mesonotuni. 14 



Pronotum normal. 4 



4. Tcgmina with the upper vein of lower ulnar 



area, and the lower vein of radial area sepa- 

 rate, never touching. 5 

 Tegmina with the upper vein of lower ulnar 

 area, and the lower vein of radial area 

 fused, or at least touching. 9 



5. Eyes distinctly projecting beyond the anterior 



angle of the pronotum. The projecting por- 

 tion of the face flat on top {Ahricta). 6 

 Eyes not, or indistinctly projecting beyond the 

 anterior angle of the pronotum. The pro- 

 jecting portion of the face rounded on top 

 (Dieineiiiana). 7 



6. The Golden Cicada is readily distinguished by 



the golden pile on abdori'en. 



* Ahricta i aitrata, Walk. 



1. For A'brictn aurata Walk., Kirkaldy gives a new name, 

 .1 curonotinna, without stating reasons The change does not appear' 

 to be necessary. 



