200 Mr. om. Waterhouse’s descriptions 
interstices of the elytra are slightly less narrow than the 
others, and more shining. 
Hab.— East Australia. B. M. 
This species resembles M. spurius, Kirby, of the first 
section, but that has the head in front nearly straight; the 
cheeks are less prominent, the thorax less strongly trans- 
verse, and the sides are not reflexed as they are slightly i in 
M. MacLeayanus, and the posterior angles are slightly 
obtuse angles. 
Mechidius corrosus, sp. Nov. 
Oblongus, convexus, niger, rugosus. Capite rugoso, 
antice triangulariter eXciso, *lateribus bene reflexis obliquis, 
sat fortiter bisinuatis. Thorace convexo, fortiter creber- 
rime punctato, pone medium parum angustato, lateribus 
leviter rotundatis, angulis posticis fere rectis; we medio 
rotundato utrinque leviter sinuato. Elytris thorace vix 
latioribus, fortiter punctato-striatis, punctis basi tuberculo 
transverso nitido, interstitiis 2, 4, 6 paulo latioribus 
nitidis sat costatis, alteris angustis interruptis. 
Long. 5} lin.; lat. 24 lin. 
This species resembles Mf. MacLeayanus, but is more 
convex; the sides of the head are much reflexed. The thorax 
is more convex, the sides are not reflexed towards the front; 
the posterior angles are nearly rectangles (not at all 
acute). The sculpture of the elytra is very rugose; the 
punctures are deeply impressed; the alternate interstices 
are very narrow, and almost lost between the striz. 
Hab.—Van Diemen’s Land. B. M. 
Mechidius gracilis, sp. nov. 
Elongatus, rufo-brunneus, opacus, flavo-setosus. Capite 
sat plano, antice fere truncato, lateribus obliquis, vix 
bisinuatis, genis angustis. Thorace  leviter convexo, 
longitudine duplo latiori, sat crebre fortiter punctato 
(punctis flavo-setosis), antice posticeque bene angustato, 
angulis anticis prominulis acutis, lateribus medio fere 
angulatis, angulis posticis obtusis; basi utrinque oblique 
truncato. Elytris thorace paulo latioribus, postice am- 
pliatis, striato-punctatis, punctis elongatis leviter impressis, 
flavo-setosis; marginibus flavo-ciliatis; singulo  elytro 
lineis tribus haud elevatis obscurioribus. Tibiis anticis 
tridentatis. 
Long. 3 lin.; lat. 14 lin. 
_ ae ill 
