629 



dilated to the apex than on the males of the other known 

 species, and scarcely differs from that cf its own female; the 

 mandibles are sexually much alike, and without any striking 

 peculiarity. The tip of each antenna is somewhat reddish. 

 The elytra of mandibular is were described as "inaequaliter 

 panctulato-rugosis et fortiter transversim rugatis," but they 

 are much less conspicuously rugose than those of the present 

 species, and have more conspicuous punctures; there are also 

 many other differences of the palpi, abdomen, etc. 



Megamerus femoralis, n. sp. 



d . Black and highly polished. Under-surface moderately 

 clothed with stramineous pubescence, the abdomen more 

 sparsely than the sterna ; with a few long hairs near eyes, 

 upper-lip with a very conspicuous fringe of golden setae. 



Head with rather dense punctures, becoming crowded in 

 front, with a large irregular depression in front of antennae. 

 Mandibles coarsely punctured and concave at base ; apical half 

 suddenly compressed so as to be deeper than wide, highly 

 polished and impunctate. Antennae long and thin, passing 

 hind coxae, tip subconical. Apical joint of each palpus 

 strongly dilated from base to apex, the apex slightly longer 

 than the inner side, but shorter than the outer. Pro thorax 

 lightly transverse, sides strongly rounded and widest near 

 apex; irregularly depressed, wrinkled, and finely shagreened, 

 the wrinkles deep and very conspicuous on the lower sides of 

 the base; punctures smaller and sparser than on head. Elytra 

 much wider than prothorax, widest across shoulders, with 

 somewhat irregular rows of distinct punctures, which towards 

 apex become transversely confluent, interstices also with 

 punctures. Basal segment of abdomen lightly impressed along 

 middle; the apical segment will a rather large fovea. Front 

 femora on one side towards apex somewhat scooped out, the 

 excavated portion bounded behind by a vertical ridge, hind 

 pair strongly angulate; hind tibiae strongly dilated to and 

 sinuous at apex. Length ( 3 , 9)> 24-26 mm. 



9 . Differs in having less prominent eyes, much shorter 

 antennae, palpi with apical joint considerably narrower (but 

 still dilated from base to apex), abdomen strongly and evenly 

 convex along middle, legs somewhat shorter, with the excava- 

 tion and ridge of the front femora less distinct. 



Rab. — South Australia: Ooldea, Murray River, Western 

 Australia : Cue. Type I. 8209. 



On the male the apical joint of each palpus is much as 

 on mandibularis, but the subapical joint is considerably 

 stouter; the mandibles are similar except that the apical half 



