BY EUSTACE W. FERGUSON. 33 



Head concave in front; intercristal ridge absent, the continuity of bead and 

 rostrum interi-upted above by a slight difference in level; supraorbital crests 

 simple, appearing as a prolongation upwards of the lateral margins of the 

 rostrum, apex briefly pointed, directed upwards. Rostrum rather shallowly con- 

 cave above, with a deep median impression, foveiform anteriorly; lateral margins 

 raised, parallel for greater part of length, slightly divergent and obtusely angulate 

 anteriorly; internal ridges and foveae oljsolete. Antennae moderately long, scape 

 rather stout, somewhat curved, first joint of funicle shorter than second, club 

 elongate, fairly stout, pedunculate. Prothorax with median area with a central 

 carina in posterior half; submedian tubercles distinct, erect, nuduliform, 7 in 

 number, the central ones exserted; lateral tubercles trianguliform, the median the 

 largest, with apex somewhat recurved, the anterior smaller, but separate, except at 

 base, the posteiior slightly smaller than median and more obtuse. Elytra with 

 granules most distinct along suture ; with three rows of moderately large, conical, 

 tubercles, first with 6 — 7, rather small and obtuse, the last 2 larger and spiniform, 

 ending on edge of declivity; second with 5 — 6, all conical, the last 3 larger and 

 spiniform, reaching a lower level on declivity than firet row; humeral tubercle 

 moderately large; third row with 4 — .5, moderately large and conical, but decrea.s- 

 ing rapidly in size posteriorly. Ventral segments olisoletely punctate, with fine 

 subsetose pubescence, thinly set, but condensed at sides. Intermediate tibiae with 

 a strong subapical notch. 



S. Larger, more robust tlian male; elytra much broader and more ovate, 

 with more evident granules, tubercles smaller, first row with 7, the last three 

 stronger and more conical, second with 7, larger posteriorly, third with 5. Venter 

 convex, obsoletely punctate; intermediate tibiae simple. Dimensions: c? 10 x 6 

 mm. ; S. 18 X 9 mm. 



Ilab. — Western Australia: King- George Sound, Pai-kerville . 



A male from Canning Ranges is larger and differs somewhat in the supra- 

 orbital crests, which do not appear so much like a continuation of the lateral 

 lostral margins, but apparently arise somewhat infernal to them; the lateral pro 

 thoracic tubercles are also larger, with tiie anterior and median tubercles almost 

 completely conjoined and more strongly directed back at the apex; the posterior 

 is also more acute ; the elytral tubercles are stronger and more numerous, 8, 8 and 

 6 in number in the three rows. A female from Kalamunda resembles the above 

 male in the supraorbital crests; the elytral tubercles number 9. 8 and 5. I do not 

 however, think these differences are of specific importance. 



The species can be readily recognised among the other membere of the group 

 by the rounded nodules on the prothorax, not flattened as in ^4. transitus nor with 

 the anterior pair enormously develojied as in A. gladiator. 



ACAXTHOLOPHUS TEANSITUS Macl. 



Macleay, Trans. Ent. Soe. N.S. Wales, i., 1865, p. 271. 



cf. Laxge. Black; spai-sely clothed with grey subpubescence, elytra more 

 densely vittate with grey between first and second rows of tubercles and t)etween 

 second and third rows; sides vittate above and below. 



Head deeply concave in front, with a single median carina; intercristal ridge 

 I'epresented by short oblique ridges running from the ends of the internal rostral 

 ridges to the crests; supraorbital crests single, short, little raised, and obtuse. 

 Rostrum with upper surface rather shallowly excavate and rugosely punctate; 



