287 



irectangularly notched at one-third from apex. Prothorax 

 rather strongly emarginate in front, sides strongly rounded 

 and very feebly serrated; with rather dense and moderately 

 large, irregularly-distributed punctures, interspersed with 

 numerous small ones, but along median third with small ones 

 only; towards base with a feeble transverse carina, nearest 

 (but not touching) the base in middle, and vanishing far 

 from the sides; with two rather small, porrect, conical, 

 subcontiguous tubercles in middle, slightly nearer base than 

 apex, the space between them and subbasal carina gently 

 depressed, between them and apex largely excavated; sub- 

 lateral foveae moderately large. Elytra rather strongly 

 punctate-striate, interstices with small punctures and in 

 places finely rugose. Front tibiae with six teeth, hind tibiae 

 bicarinate. Length, 14 mm. 



I Fab. — Western Australia. Type (unique) in National 

 Museum, from C. French. 



Nearer to chelyum than to any other species known to 

 me, but the two median processes of pronotum closer 

 together, the transverse carina less conspicuous, at its middle 

 nearest to the base (instead of most distant from it there), 

 cephalic elevations very different, and mandibles rectangu- 

 larly notched. 



BOLBOCERAS TRYMODERUM, 11. Sp. 



Dark castaneous. elytra almost black, some projecting 

 parts of head and legs black. In places densely pilose. 



Head gently dilated near eyes and feebly depressed in 

 middle; with rather small, irregularly-distributed punctures; 

 ocular canthi acutely angular at outer apex; clypeal elevation 

 lightly tuberculate on each side, in middle elevated into a 

 conspicuous semi-double process, oblique on its posterior face, 

 almost vertical on its lateral and front faces; margining lines 

 of clypeal areas in places obliterated; mandibles rather lightly 

 notched towards apex. Pi'othorax rather deeply emarginate 

 in front, sides strongly rounded and lightly but unevenly 

 serrated ; with moderately large irregularly-distributed punc- 

 tures, and some very small ones ; with a conspicuous median 

 carina terminating near each side slightly in advance of 

 the sublateral fovea, its middle slightly nearer b-^se than 

 apex ; in front of carina almost vertical, and with transverse, 

 semi-double ridges, each about the width of the scutellum, 

 and separated slightly more than same ; in front of the space 

 between them with a deep round fovea, a moderately distinct 

 fovea on each side of middle of front margin. Elytra strongly 

 striate-punctate, both striae and punctures becoming less 

 denned posteriorly. Front tibiae witli six teeth, hind tibiae 

 bicarinate. Length, 13 mm. 



