Notes on Australian Coleoptera. 173 
Elytra oval, thorax cordiform (Ovicollis). 
Elytra oval, thorax and elytra depressed (Subde- 
Pressus). 
ad. Klytra smooth. 
- Elytra without strize, thighs red— 
Elytra oval (Lweidicollis). 
Elytra oblong (Gracilis). 
Elytra without strie, thighs black (Concolor). 
Elytra with a sutural striz, their form attenuated 
behind (Suturalis). 
Elytra with a sutural strie, their form rounded 
behind (Howitti). 
PARROA. 
Mentum with a very large, deep, broad, and almost square 
excavation, without any tooth, its wings large, broad, 
rounded externally, pointed at their extremity, straight at 
their internal side. Palpi thick, the maxillary having the 
first article short, the second long, and rather arched, the 
third short and conic, the last being the longest, oval form, 
and truncated at its extremity, the labial having a rather 
. short basal article, the second long, the third of the same 
length, thicker, oval, and truncated at the end. Mandibule 
short, thick, arched, and pointed, in great part covered by 
the labrum ; the right one has several large teeth, the other 
is simple. Labrum large, broad, denticulated in front. 
Antenne with their first article large, the second short, the 
third the longest and conical, the following of the same form; 
the others almost oval form, short, rather rounded, and the 
Jast oval and pointed. ‘Tarsi strong, the anterior having 
their four first articles triangular, the basal being the 
largest ; those of the male more dilated ; all having below 
long and strong hair. Head rather large, oval; eyes 
'round; thorax rounded laterally, almost globular; elytra 
‘oval; legs strong. 
These insects are nearly allied to Promecoderus, but very 
| distinct by the absence of the tooth to the mentum; their 
' size is much larger. : 
__ Parroa Howititi: length.12'; of a brilliant black ; thorax 
globular, rather cordiform, and prolongated behind, with 
the anterior angles advanced and pointed ; it has a longitu-. 
‘dinal sulcate in the middle, a strong transverse impression. 
| behind, and a very slight one in front; the sutura has trans-. 
