289 



middle; with large shallow punctures, dense in front, irregu- 

 larly distributed elsewhere; with a feeble and irregular 

 median line. Scutellum with irregular punctures, hind 

 margin rugose. Elytra three-fourths as wide as long 

 (18 x 24 mm.), shoulders rounded, sides gently dilated to 

 beyond the middle; with irregularly distributed and rather 

 small punctures, some round and others transversely rugose; 

 disc of each elytron with three extremely feeble costae, the 

 third commencing in a shallow post-humeral depression. 

 Pygidhim acutely margined, tip obtusely bilobed, with 

 numerous small punctures and in parts sha greened. Legs 

 long: front tibiae acutely tridentate, hind tibiae with two 

 unequal spurs, the inner one moderately acute and about as 

 long as basal joint of tarsi, the outer one longer and wider, 

 dilated from base to beyond the middle, and then feebly 

 rounded to apex; claw-joint with a short bisetose onychium ; 

 claws long-, with a strong acute tooth about middle and a 

 rounded swelling at base. Length ( <3 , 9)' 34-39 mm.. 



9 .. Differs in having prothorax smaller and narrower, 

 elytra more dilated, abdomen considerably larger, pygidium 

 more convex and much less acutely margined, club much 

 smaller, legs shorter, spurs to hind tibiae wider and shorter, 

 and hind tarsi considerably shorter. 



Hab. — Western parts of South Australia: Ouldea (R. 

 T. Maurice), Lake Arcoona (A. Loveday), Overland Railway, 

 ten miles east of Golden Well ( — Chandler, in National 

 Museum). Type, I. 517. 



The largest specimen in actual bulk is exceeded only by 

 an unusually large specimen of Lepidiota froggatti, of all the 

 Australian Mdolonthides in the Museum, but its length is 

 slightly less than that of Lepidoderma waterhousei. The 

 club is composed of eight joints, instead of seven, as in 

 callobonnensis and the following species, but in the allied 

 genus, Ehopaea, the joints of the club vary in number from 

 five to eight. On the male the first lamella of the club is 

 about as long as the clypeus is wide, and is truncate at its 

 tip, the second is rather abruptly bent backwards from where 

 it passes the first and (as also the succeeding joints) is 

 about one-third longer than it. On the female the lamellae 

 of the club are onlv about the length of the basal tarsal 

 joint, the first lamella is about two-thirds the length of the 

 others, slightly longer than the joint itself, and acutely 

 pointed. On the apical joint of the only female in the 

 Museum there is a small swelling that from some directions 

 causes the club to appear nine-jointed, but this is probably 

 accidental. On the specimen in the National Museum there 

 are a few long hairs near each front angle of the pronotum. 



K 



