of the genus Gatasarcus. 15 



Colour, clothed with scattered scales, mixed with setse 

 on the lower portions of the tibiee and on the tarsi, 



A very peculiar substance, which the French call 

 " enduit/' probably from the Latin " indumentum/' for 

 which we have no corresponding term, but which I have 

 mentioned as " &> sort of exudation" is found in a few 

 species. Two have it in the form of small grains as if 

 sprinkled with sand, and two others have a waxy varnish, 

 which, however, appears to be a part of the true integument. 



The greater part of the species of Gatasarcus are 

 found in Western Australia. I only know of one {G. 

 transver sails) from South Australia, one {G. memnonius) 

 from Victoria, and two (C. ovinus and G. concretus) from 

 Queensland. Probably a longer list could be given by 

 the Australian Entomologists, and I hope they will not 

 long delay to do so. Mr. Du Boulay tells me that each 

 species appears to affect a particular shrub or tree. I 

 believe nothing is known of their earlier stages. 



There are thirty-four new species described in these 

 pages ; some individuals which I have placed as varieties 

 might no doubt be considered " good species,^' but this 

 is one of those genera which prove how much more diffi- 

 cult it is to determine the limits of species than the limits 

 of genera. 



The sexual differences appear to be very slight. The 

 male is a little smaller, and is narrower behind than the 

 female, the elytra curving inwards very perceptibly to- 

 wards the apex. It is only a few of the species, how- 

 ever, that we are able to pair. 



I have divided the genus into three sections, and have 

 given a table of the species under each. 



Gen. Catasakcus, Schonherr, Curcul. v. 812. 



Section 1. 



Elytra ivithout dorsal spines. 



a Suture with a line of condensed scales. 



b Front convex C. lilineatus, Fahr. 



b h Front flat C. sutwalis, n. sp. 



a a Suture concolorous. 



c Oval, and more or less oblong. 



d Spaces between the punctures on the elytra 



ridged or tuberculate. 

 e Moderately convex above. 

 / Bidges on the elytra finely and closely 



tuberculate C. opimus, n. sp. 



