499 



brightly iridescent; the elytra are also slightly more dilated 

 posteriorly than on the typical form, but the antennae and 

 palpi are in agreement. Its pygidium is clothed with very 

 dense and short setae, as on all other specimens that I have 

 examined of the species. Its general appearance is much like 

 gagatina, but that species has non-iridescent elytra, and the 

 prothorax (for the genus) coarsely sculptured. Its iridescence 

 was probably the determining factor with Blackburn in 

 referring the species to Group 4, as by its palpi it should not 

 have been referred to that group. 



Haplonycha nobilis, Blackb. 



The type of this species is a female. Two males from 

 the Warren River (near the original locality in Western 

 Australia) differ in being somewhat larger, and with the 

 ramus of the basal joint of the club considerably longer 

 (although smaller than that of the following joint), the fifth 

 joint of the antennae has also a more conspicuous spur than 

 on the female. 



H. deceptor, Blackb. Birkett's Woolshed, Cooper Creek, 

 Trinity. 



H. fraterna, Blackb. Orroroo. 



H. palpalis, Blackb. Museum Expedition. 



H. setosa, Blackb. Oodnadatta. 



H. solida, Blackb. Ooldea (pi. xxxiv., fig. 23). 



Group 1. 

 Haplonycha octoarticulata, n. sp. 



Reddish-castaneous and moderately iridescent ; head, 

 tibiae, and tarsi somewhat darker, antennae paler. Under- 

 surface and legs with dense golden hairs, pygidium with 

 short, dense, erect setae, lateral gutters of pronotum with a 

 few long hairs, rest of upper-surface glabrous ; membranous 

 fringe ( 10 ) of elytra rather long, its greatest length almost 

 equal to that of the fourth tarsal joint. 



(10) On this, as on all other species of the genus, each elytron 

 has two marginal fringes — the first a row of rather long stiff setae 

 projecting outwards, often at right angles to the derm ; the second 

 a much more closely packed row, apparently in most species con- 

 nected by a fine membrane, so as to appear semisolid, and project- 

 ing downwards. Its length varies considerably in the different 

 species, and it appears to be easily abraded. When first dealing 

 with the genus (under the name of Colpochila) Mr. Blackburn 

 appeared to consider the membranous fringes as of use in descrip- 

 tions. The tips of the tibiae and of some of the tarsal joints, the 

 outer edge of the clypeus, and the front tibial spurs are usuallly 

 black, but I have not considered it necessary to mention these 

 under each species. 



