of New Phytophaga from Western Australia. 421 
This genus is based upon examples which are imperfect ; it is, 
however, abundantly different from Edusa in its much more 
parallel, less robust, and more elongate form, in the less mani- 
fest inclination of the thorax, and in its more porrect head, and 
distinctly emarginate labrum. 
1. Ocnus viridis. 
Rugosus, viridis, pedibus rufis: caput punctatum, labro levi 
rufo ; thorax quadratus, fortiter punctatus ; scutellum leviter 
punctis ad apicem ornatum ; elytra parallela, depressa, trans- 
versé rugosa et punctata, rugis apud medium distinctis 
versus apicem obsoletis ; antenne pallide rufee, apicibus 
fuscis ; corpus subtus nigrum, abdomine nigro-viridi; pedes 
rufi. 
Long. corp. lin. 3; lat. lin. 14. 
