and Species of Coleoptera. 'f)5 



This species was taken many years ago by Mr. Wliitely, 

 and was unknown to ^Ir. Lewis, who has formed extensive 

 collections in Japan. I think it may be placed after M. vario- 

 laris. 



Monochamus acanthias. 



M. robustus, pube sericante griseo-fulvescente tcctus ; capite antice 

 puiictis perpaiicis iraprcsso ; aiitoiinis ( c5' ) corpore plus duplo 

 lonfjioribus, 12-articulatis, pallidis, aij^ro-annulatis ; prothorace 

 valde transverso, sparse piinctulato ; elytris amyjliatis, postice 

 angustioribus, apicibus angulo extoriore spina clongata armatis, 

 supra iniccjuatis, oblique bijdagiatira saturatioribus, irregulariter 

 sparse punctatis ; corpore subtus pedibusque dense flavidulo- 

 pubescentibus ; tibiis anticis vix clongatis, flexuosis. Long. 12 

 lin. 



Hah. New South Wales (Manning River). 



The nearest allies of this species appear to be M. argutus 

 and M. solotus ; the latter, which has a dull mottled greyish 

 pubescence, has I believe been also taken at Cape York. The 

 other Australian species have the apices of the elytra rounded. 

 In this species the spine is comparatively unusually long and 

 slender, and is directed towards the median line of the body. 

 The tendency of the antenna to form a twelfth joint by the 

 division of the eleventh is shown in many species by a dark 

 ring, at about two thirds of the length of the latter, simulating 

 a joint ; in this case, though it may not be invariable, the 

 separation is well marked. I have adhered to the original 

 generic name as it was used by Latrellle, Serville, and others. 

 Monohammus (from fiovo'i and dfjufMa) has no application, and 

 is only misleading ; and if such be its derivation, I take it 

 that the orthography should be Monammus. 



EUXITIIERA. 



(Ceroplesinae.) 



A Thysia difFert articulo basali antennarum cicatricoso, unguiculis 

 divergentibus ; mesosternum elevatum, aatice productum. 



The type Thysia viduata * (PI. VIII. fig. 4) is apparently so 

 closely allied to Thysia that, notwithstanding its differently 

 formed mesosternum, I had no hesitation in placing it in that 

 genus. Since, however, the appearance of Lacordaire's ninth 

 volume I have reexamined it, and find that two important 

 characters in the classification of that author, viz. the relative 

 position of the claws to one another and the cicatrix of the 

 basal joint of the antenna, would not strictly permit it to 



* Ante, Annals, ser. 4, vol. iv. p. 208. 

 Ann. ct- Mag. N. Hist. Ser. 4. Vol. xv. 5 



