BY EUSTACE W. FERGUSON. 21 



fl/j/f «//.-■, liiimeralis, echidna, denticoUis, serraticollis, approximatttu, spinifer, 

 howittii, t:qualidi(>:, trimcaticornis, angasi, scabroaiia , mucronatus, sqHamosvs, 

 Krefftii, tridentatus, and crenaticollis. Later (op. cit., 1866, pp. 327-330) he 

 added 8 moj-e species, — mastersii, posticalis, rugieeps, irroratus, siiblobatus, gra- 

 vicollis, tribi'liis, and convexitisculus. Of these 29 species, 10 must go down to 

 synonymy; thus spinosus = lateralis Bohem; serraticollis is l)ut a variety of 

 denlicollis Macl. ; approximatiis and angasi are not specifically distinct from 

 adelaidae Waterhouse; howittii is the other sex of spinifer Macl.; sqiialidus and 

 titincaticornis are the same; mastersii and po'.sticalis are founded on the sexes of 

 the one species; rugieeps = aureolus Bohem: irroratus = crenaticollis Mad.; 

 sublobatiis is founded on the females of adelaidae and squamosus. One — conrexi- 

 usculus — must be removed from the oenus. and I would place it tentatively in 

 Hgborrhi/nchus. In addition to the above, two species described by Macleay a.s 

 Cubicorrhynchus must be placed in Acantholophns; eximius has already been re- 

 ferred there by Lea, and in the present paper I have placed (7. maximus Macl. in 

 Acantliolopliiis. In addition, Macleay reviewed the previously described species 

 and divided the genus into groups. 



In 1873, Pascoe (Journ. Linn. Soc, Zool., xii. (1876), pp. 6-7) added 

 the names of 3 species, — gladiator, na-sicornis and simpler; of these, nasicornis is 

 little more than a variety of A. aureolus Bohem. Sloane, in the Scientific Re- 

 sults of the Elder Expedition (Trans. Roy. Soc. S. Aust., xvi., 1892, p. 231), 

 described one new species, — gravulatus. This name had previously been listed by 

 Schonherr (Mantissa seeunda, p. 57, 1847) as a new species of Acaiitliolophus, 

 hut it was a nomen nudum, no description being published, though Waterliouse 

 doe. cit., p. 2) included it in his table. Blackburn described 4 new species of 

 Acanthnlophm, — franklinensis (Trans. Roy. Soc. S. Aust., 1890, p. 92), niveovit- 

 tatus (Proc. Linn. Soc. N.S. Wales, v., 1890, p. 576). s/to^^m- and tatei (Report 

 Horn Exped., 1896, p. 292). Of these, the name simplex is preoccupied, and I 

 have already altered the species to blackburni (Trans. Roy. Soc. S. Aust., xxxix., 

 1915, p. 59). 



Lea described two species, — tasmaniensis (Mitt. a. d. Zool. Mas. Berlin, 1910, 

 p. 182), and foveirostris (Mem. Soc. Entom. Belgique, x\'iii., 1910, p. 85). 



Within recent years I have added 9 species to the genus, — angusticollis, dixoni, 

 hrevicornis (Proc. Roy. Soc. Victoria, xxvii., 1915, pp. 256-259), browni, alpicola, 

 tennantensis, halmaturinus, simulator and scaphirostris (Trans. Roy. Soc. 

 S. Aust., xxxix., 1915. pp. 66-73). A. brericnrnis I now regard, however, as 

 merely a geogTaphical race of .1. dumosu.<< Bohem., .1. tennantensis as a variety of 

 A. tatei Blackb., and A. simulator as little more than a variety of .1. tribnlus 

 Macl. 



In the present paper I propose the names of 10 species as new, which, with 

 the removal of synonyms, etc., give a total of 57 species for the genus at present 

 known. That this number will be augmented T have no doubt. Possibly also 

 forms which I now regard a.s varieties of other species will prove with more 

 material to be worthy of specific rank. 



Characters of Genus. — Before proceeding to the question of the division of 

 the genus, it may be advisable to discuss the characters at greater length than 

 given in the generic diagnosis; this is the more necessary as it will afford an op- 

 portunity of defining some of the terras employed in the description of species. 



In the majority of the species the head is concave in front, and, as is best 

 seen from behind, separated from the dorsal surface of the rostrum by a distinct 



