60 EEVISIOX OF THE AMYCTERIDES, vi., 



convex, inuictures sul)ubsnlfte. lii-tter iiKirki'il on apical seg'incnt ; less simple, 

 Dimerhiinns: d. 18 ^ t5.5 mm.; $. 21 ^ mm. 



Ilab. — Western Australia : Perth, Swan Kiver, Guildford, Harvey. 



A large species readily recognised by the first tubercle of the prothoracie 

 submedian rows being larger than the others. This character is also found in A. 

 lateralis Boliem., to which ^1. sntiiralif; is closely allied; the distinctive characters 

 separating the two species are given under -.4. lateralis. 



ACAXTHOLOPHDS LATERALIS BoheUL 



Bohemann, Sclionh.. Gen. Spec. Cure. vii. (1), 1843, p. 75; Macleay, Trans. Ent. 



Soc. N.S. Wales, i., 1865, p. 277; .1. spitwaits, Macleay, loc. cit., p. 274. 



Close to A. sKtnralis Bohem., but shorter and relatively stouter. Black; 

 with brown subsquamose clothing, vittate with white or cream, a median vitta ex- 

 tending from head to edge of declivity of elytra, a short vitta down declivity 

 between first and second rows of tubercles, and a vitta at base of elytra Ijetween 

 second and third rows; sides with a prominent white vitta along middle of pro- 

 thorax, and lower margin of elytra. 



Head, rostrum, antennae and prothorax as in .1. sninralis. P^lytra shorter, 

 oval in siuq^e; granules not conspicuous except for a row of large granules along 

 each side of suture; tubercles fewer in number and fiirtiier apart, fli>t row with 6, 

 the liasal 4 obtuse but decidedly larger than in ^4. sutnralis, the basal tubercle 

 being larger than the othei's. the apical two, strong, acute spines; second row 

 with 5 all large and distinct, but the basal 2 smaller and less acute than the 

 others; humeral angk with 2 obliquely set, rather small, tubercles; third row with 

 2 — 3 large spiniforni tubercles. 



d". Venter strigosely reticulo-punctate as in A. stdturali'! ; intermediate 

 tibiae notched. 



?. Venter convex, sculpture obsolete; intermediate tibiae only shallowly 

 notched- Dimensions: (S. 16 ^ 6.. 5 mm.; ?. l(i >< 6.5 mm. 



Hah. — Western Australia: Swan River, King George Sound. 



Bohemann's lengthy description leaves no doubt as to the identity of his 

 species, and I can find no reason for separating .1. spinosKs Mad. from it, 

 though Macleay placed the two species in different groups. In commenting on 

 this s])ecies and A. suturah's. Waterhouse stated tli.at A. lateralis had a single 

 large humeral spine, whilst ,1. sH/wmY/.s- had two or three very small spines on 

 the humeral angle of the elytra. Macleay remarked that he could find no such 

 distinctive marks. From the short series of .1. lateralis (4) and .1. suturalix 

 (fi) before me T should say that the revei'se wiis the ca.se, but probably it is a 

 variable character as one of the specimens of A. sxliiralis has two small tubercles 

 in place of a single one. 



The species is evidently very close to -t. snt7(ralis, but apart from the ch)th- 

 ing may be distinguished by its shorter form and the fewer elytral tubercles, 

 especially in the first and third rows. Trj .1. lateral!-^ there never appear to be 

 more than 3. generally 2, tubercles in the third row. while in A. siitiiralis there 

 are 4 and sometimes more on this row- 



AcAXTttor.oPHUs humebj\.lis Mad. 

 Macleay, Trans. Ent. Soc. N.S.- Wales, i., 186.5, p. 278. 

 J. Large, rather strongly (-oincx from side to side. Black, tubercles 

 slightly reddish : densely clothed with brown decumbent pubescence, \ittate with 



