208 CARABIDiE FROM THE UPPER WILLIAMS RIVER, N.S.W. 



lens; disc rather convex; margins wide, depressed ; sides I'ounded 

 anterioi"ly, narrowed and subsinuate posterioi'ly; apex lightly 

 emarginate, anterior angles rounded ; base shortly lobed in 

 middle, basal angles obtuse, median line strongly impressed. 

 Elytra broad (4 x 3 mm.), widest about posterior third, a little 

 narrowed to base, rounded on sides; humeral angles widely 

 rounded. Length 7-7-5, lireadth 3-3-5 nun. 



Hab. — Mount Royal Range, N.kS.W. Common under loose 

 hark on trunks of K. coriacea, at 5,000 feet. 



This is one of the largest species which has been attributed to 

 the genus Ayonochila. Tts distinguishing characters are its broad 

 elytra, with a wide, posthumeral, testaceous plaga on each elytx'on. 

 The pattern of the elytra varies a good deal : — taking the ground- 

 colour as pitchy-brown, there is usually a wide, testaceous, post- 

 humeral plaga on each elytron, and an apical, duller-coloured 

 pat<"h (more or less common to both elj-tra); sometimes the post- 

 humeral and apical markings are wiflely separated by the brown 

 ground-pattern; sometimes the plagae extend backwards and join 

 the apical mark, so that the brown parts of the elytra become 

 arranged in three, irregular stripes, viz., a sutural stripe and one 

 near each side, these stripes being wide and near together about 

 the apical third of the elytra. Compared with A. corticalis 

 Erichs., A. playiata is larger and differently marked; prothorax 

 with sides more strongly narrowed to base, elyti"a more strongly 

 punctate. It is lemarkable to find, in this species, the prothorax 

 with either one or two, anterior, marginal seta^ on each side; 

 where there are two setse, these are wide apart, the posterior one 

 situated as usual, the anterior one a little less than half-way 

 between it and the anterior angle. Twenty-six specimens have 

 been examined; of these, seventeen had one seta, and nine two 

 sette. Specimens of both sexes occurred with one and two setae. 



