BY EUSTACE W. FERGUSON. 35 



Head concave in front, with a rather low, but distinct intereristal ridge; 

 supraorbital crests rather obtuse and stumpy, the two rami about equal in length, 

 projecting foi-wards and upwards and little divergent; intereristal ridge running 

 into base of anterior ramus. Rostmm short and broad, concave above, with ex- 

 ternal margins obtusely angailate in front of middle, low posteriorly; internal 

 ridges moderately distinct ; basal foveae well defined. Antennae with fii-st joint of 

 funicle shorter than second; club elongate, pedunculate. Prothorax with sub- 

 median tubercles low, noduliform, the apical ones not larger nor conjoined, not in 

 single series, the middle ones more outwardly placed; sides explanate-tuberculate, 

 the tubercles flattened triangiiliform, the anterior conjoined with median, which is 

 the largest, the posterior well-developed but shorter than median. Elytra with 

 rows of somewhat obscure punctures, and with granules varying in development, 

 sometimes obsolete; with three rows of tubercles, varying in number and some- 

 what in, size, the fli-st row with 8 — 10, the basal ones small and noduliform or 

 hardly larger than gTanules, becoming larger and more acute posteriorly and end- 

 ing on edge of declivity ; second row with 6 — 8, larger and more acute posteriorly 

 and ending slightly farther down on declivity than first row; humeral tubercle 

 small but acute, followed by third row of 5 outwardly projecting tubercles, be- 

 coming smaller posteriorly. Venter nitid with moderately coarse punctures, the 

 apical segment rather coarsely strigose. with punctures confluent. Intermediate 

 tibiae simple; posterior tarsi with first joint short and broadened to apex. 



S. Larger and more obese; head and prothorax similar; elytra broader with 

 evident rows of granules, tubercles smaller and more obtuse; venter convex, with 

 punctures as in male. Dimensions : c?. 17 X 7 mm. ; 2. 19 X 8 . 5 mm. 



Hab.— N.S. Wales: Sydney, Illawarra. 



There exist two forms of this well-known species which I was inclined at 

 first to regard as separate species, but a longer series shows that the characters which 

 distinguish them are variable. In some specimens the ehiiral tubercles are fewer 

 and more widely separated, while they are also slightly larger and more acute ; the 

 interstitial granules are obsolete or little e\adent. In the other form the tubercles 

 are more numerous, smaller, and more obtuse, while the granules may be very 

 conspicuous, particularly on the sutural and second interstices. Intermediate 

 forms between the two extremes, however, occur. Probably the type belonged 

 to the more granulate form, as the granules are mentioned in the original descrip- 

 tion. 



The species may be distinguished from other members of the group, with 

 the exception of ^1. sellatiis, by the much broader and shorter posterior tarsi. 

 From A. sellatus it is disting-uished, inter alia, by the simple intermediate tibiae. 



The species is not uncommon about iSydney. and lives in the roots of the 

 grass-trees (XanthorrJioea), a habit possessed by some Western Australian and 

 South Australian species. Specimens in the collection of the late H. W. Cox 

 were labelled Illawarra; probably they were taken near Otford and on the sand- 

 stone formation. 



Masters' Catalogue gives two synonyms under A. marshami, — echinatus 

 (Dej. Cat., 1st Ed., p. 64) and sepidioides (Latr., Dej. Cat., 3rd Ed., p. 289) — 

 but these names appear to be nnmina nuda. 



ACANTHOLOPHUS SELLATrS, n . Sp . 



(?• Black, rather densely clothed above, except on tubercles, with brown sub- 

 pubeseence, prothorax and elytra obscurely vittate with grev. 



