]06 REVISION OF SYMPETES AND HKL^DS, ETC., 



beneath clothed wibh reddish tomentura. Prosternum slightly 

 convex; with raised border extending around the coxpe, hind 

 margin subvertically produced; submentum closely punctured. 

 Dimensions 18 x 11 -5 mm. 



Hab. — South Perth, West Australia; collected by Mr. H. Giles. 



Four specimens are before me, one ^, the rest, I think, 9, sent 



by that very observant naturalist, Mr. Henry Giles, of the 



Zoological Gardens, South Perth, to whom I am much indebted 



for these and other specimens, and after whom I name this insect. 



From //. rihgosipennis Carter, it differs in its broader form, 



smoother and more nitid prothoi'ax (with its double humped 



carina), and the bristly clothing of its elytra. Type in author's 



coll. 



Hel.eus occidentalis, n.sp. 



Wider and more convex than the preceding {H. Gilesii), and 

 of a more nitid black on the upper surface. 



Head wider than in //. Gilesii, with upper surface dotted with 

 small pustules, triangular impression in front of eyes bisected by 

 distinct longitudinal sulcus, extending to base of eyes; antennae 

 stouter, especially the basal joints. Prothor ax {Q x 11 mm.) 

 bearing minute setigerous pustules on disc and margins, widest 

 at base, narrowing more abriiptl}', and more sinuate towards 

 apex than H. Gilesii; posterior angles acute, dent;ite and deflexed 

 at point, but not incurved, anterior processes widely rounded and 

 overlapping, enclosing the head in an ellipse wliose major (trans- 

 verse) axis is 2 mm. Width of combined margins to disc at base 

 as 5 : 6, these more concave than in //. Gilesii, with the edge more 

 thickened and not continuous with under surface; base trilobed, 

 marginal base very finely serrated, not margined. Disc with 

 central carina not reaching apex, more strongly raised in a double 

 hump {i.e., with frontal declivity much steeper) and forming a 

 high rounded tooth near base, with posterior outline less vertical 

 than in //. Gilesii. SciUellum transverse, triangular, and raised. 

 ^Zy^ra broader than long (11 x 12-5 mm.), widest behind middle, 

 humeral angle rounded, nob defined, sides scarcely incurved at 

 base, apices separately rounded, foliate margins wider than those 



