BY THE REV. T. BLACKBURN. 121 



tlie extreme lateral margin of the elytra. The antennal club is 

 scarcely pedunculate ; the 2nd joint of the funiculus is about as 

 long as the 3rd and 4th together. 



S. Australia ; basin of Lake Eyre. 



The following is a tabulation of distinctions among the species 

 of Titinia and Idaspora so far as they are known to me. The 

 two species that are not known to me are T. ignara, Pasc, and T. 

 marmorata, Pasc. The colouring of these is different from that 

 of any species I have seen, but I am afraid colour and markings 

 are very little to be relied upon. T. ignara, however, is described 

 as having its prothorax longer than wide, and if this be correct 

 by measurement, that character will separate it from all the 

 following. Of T. marmorata the author says that the prothorax 

 is subcylindric, which at once furnishes a distinction from all the 

 species I have seen except T. eremita. The latter and T. marmo- 

 rata are from localities so far apart that they seem unlikely to be 

 identical, and are very differently marked and coloured, — e.g., T. 

 marmorata having 3 fuscous vittiB on its prothorax, which is quite 

 a different style of marking from that of the prothorax of T. 

 eremita. 



A. Rostrum very narrow between the scrobes. 

 B. Basal joint of the funiculus much longer 

 than 2nd joint. 



C. Prothorax considerably wider at base 



than at front margin Icnta, Blackb. 



CC. Base and front margin of prothorax 



about equal in width — tenuis (Merimnetes), Germ. (1). 



BB. Basal joint of the funiculus about 



same length as second joint hrevicollis, Blackb. 



AA. Rostrum but little narrowed between 

 the scrobes {Idaspora, Pasc.?). 



B. Basal joint of funiculus scarcely or not 

 longer than 2nd joint. 



