•636 MISCELLANEA ENTOMOLOGICA, NO. V. 



This genus, which gives its name to the sub-family, contains in 

 itself in the most exaggerated degree all the peculiarities of the 

 gi'oup. The thorax enclosing the head ; the broad, flattened form, 

 and the large expanded upturned margins, are very largely more 

 conspicuous in the species of this genus than in any of the others. 

 The greater number of the species are from South Australia, 

 the Swan River settlement, and the interior. I think it may 

 be classed generally as an inhabitant of the dry and barren plains 

 of the far interior. 



I propose to group the species into those with — 



1. The elytra smooth or only granulate. 



2. „ ,, ])ilose, 



3. ,, ,, bicostate. 



4. „ „ tuberculate. 



1. Elytra smooth or only granulate. 



61. Hel.eus Colossus, De Breme. 



Mon. Cossyph. I. p. 59, pi. IV. fig. 1. 



Broadly ovate, brownish black, sub-opaque, glabrous. Head 

 finely rugose, labrum exserted, a little emarginate, clypeus 

 depressed, rounded laterally, and broadly emarginate at the apex. 

 Antennse brown, a little longer than the thorax ; the last four 

 joints large, round and reddish, the terminal one a little elongated. 

 Thorax rounded, strongly sinuate posteriorly, scarcely visibly 

 rugose; the disk convex, uneven, on the base of the median line a 

 strong erect spine, not touching the basal margin of the thorax; 

 the lateral margins very broad, finely rngose-punctate, and turned 

 up on the borders ; the anterior angles very rounded and strongly 

 crossing one another, the posterior angles curved backwards. 

 Elytra oval and rounded behind, with a scattered minute granula- 

 tion, the disk oval, sub-convex and a little prolonged towards the 

 apex ; the margins broad like those of the thorax, feebly raised 

 and reflected on the borders : body beneath of a reddish-brown and 

 punctate ; the tibiae rough. 



