231 



hopeanus) ; the lightly-marked specimen is also without a 

 median line. 



Maechidinus, n. g. 



Read rather small. Eyes small and lateral. Clypeus 

 entire in front, its basal angles slightly exterior to eyes. 

 Maxillary palpi small, the labial ones very small. Antennae 

 nine-, club three-jointed and rather small. Prothorax not 

 much wider than greatest length ; hind angles semicircularly 

 excised. ScuteUum semicircular. Elytra not covering the 

 propygidium and pygidium. Prostemum with a W-shaped 

 excavation in front for reception of antennae, one of which 

 rests on each side of a triangular intercoxal process. Legs 

 rather stout; front tibiae tridentate, the third tooth small and 

 close to the base; claws long, thin, and simple. 



This genus appears to be allied to Caidohius, and its front 

 tibiae are much as in that genus and Automolus, but the 

 prosternal sutures are widely open, allowing the antennae to 

 be concealed when at rest, as in Maechidius ; a notch on each 

 side of the base of the prothorax is often present in 

 Maechidius, near which the genus should be placed in cata- 

 logues; but it is readily distinguished therefrom by the entire 

 clypeus, exposed propygidium, and great distance between the 

 second and third teeth of the front tibiae. 



Maechidinus latericollis, n. sp. 



Black; palpi, claws, and parts of antennae reddish. 

 Upper-surface with stout depressed setae, or lanceolate scales, 

 dense and mostly black on head, dense and white on sides of 

 prothorax, and black in middle, irregularly distributed and 

 sparser on elytra ; under-surface, pygidium, propygidium, and 

 parts of legs closely plated with snowy- white scales, legs in 

 addition with numerous long whitish hairs, tips of abdomen 

 and of pygidium with golden setae. 



Head with dense, partially concealed punctures. Clypeus 

 widely transverse, front truncate, sides gently rounded, hind 

 suture normally concealed. Prothorax strongly convex, sides 

 strongly rounded, at about the basal third with a small tooth 

 marking the outer end of a strong basal notch, front angles 

 produced and acutely triangular ; median line shallow ; punc- 

 tures crowded and moderately large. Elytra with irregular 

 rows of punctures, many of which are separated by small 

 transverse shining granules, interstices of uneven width and 

 obtusely serrated. Basal joint of hind tarsi conspicuously 

 shorter and thicker than second. Length, 7-9*5 mm. 



Hab. — Western Australia: Beverley (E. F. du Boulay). 

 Type, I. 4583. 



