183 



Prothorax widely declivious but not excavated in front; about 

 one third from base with two strong curved spines or thin 

 horns, at the outer base of each a large fovea shallowly 

 connected with the small sublateral one ; sides finely and 

 acutely serrated; a few punctures obliquely placed behind 

 each eye near apex, some at sides and others in basal gutter, 

 elsewhere impunctate. Scutellum impunctate. Elytra with 

 narrow punctures in striae. Front tibiae with five teeth, 

 hind ones with two wide carinae. Length, 19 mm. 



9 . Differs in having the head with more numerous 

 punctures and granules, front face of clypeus crowned with 

 four equi-distant subtriangular elevations; prothorax 

 unarmed, with coarse irregularly distributed punctures, 

 sublateral foveae smaller and the median ones absent, and 

 with a rather short (not the width of the head) transverse 

 bisinuate carina about one-third from apex. 



Hab. — Western Australia: Geraldton (J. S. Clark). 

 Type, I. 10660. 



Allied to frontal e, and with the head of the male some- 

 what similarly armed, but the spines of the prothorax are 

 thinner and more divergent, and the large foveae or 

 excavations are differently placed : on the present species each 

 is subbasal and encroaches upon the hind part of a submedian 

 spine, its nearest part to the margin being about twice its 

 width ; on frontale the excavations are considerably larger, 

 some distance from the median armature, and each opens out 

 on to a front angle ; the females of the two species are very 

 similar. The head of the male before and behind the frontal 

 spines has numerous small subobsolete granules, elsewhere it 

 is smooth and almost or quite impunctate. 



BOLBOCERAS TRIUNUM, n. Sp. 

 PI. xxv., fig. 20; pi. xxvi., fig. 4'7. 

 d ■ Pale castaneous, tips of some projections infuscated 

 or black. Under-parts densely pilose. 



Head mostly flat, smooth near base, rather densely 

 granulate elsewhere, front face of carina short, its middle 

 crowned with a small tooth, this connected by a carina with 

 a smaller tooth just above each antennal notch; each 

 mandible with an almost rectangular notch, the front edoe 

 truncated. Prothorax with three rather small elevations 

 arising from a fairly large common base, the median one 

 carinated in front, a curved carina feeble but well defined 

 and close to base in middle, and obscurely ending on each side 

 between the elevations and the small sublateral fovea ; sides 

 finely and rather obtusely serrated; punctures crowded 

 towards sides, irregular in front and sparse elsewhere. 



