42 CATALOGUE OF 



Genus 14. ELASMODEMA. 

 Elasmodema, Stal, Rio Jan. Hem. 68. 



1. Elasmodema Erichsom. 



Erichsoni, Stal, Rio Jan. Hem. 68. 



Rio Janeiro. 



This and the following genus are perhaps more allied to the Nudirostra 

 than to the Corticolae, and may form a family of the former when a few 

 more forms to he associated with them are known. 



Genus 15. TSODERMUS. 

 Isodermus, Erichs. Arch. Naturg. viii. 281. 



1. Isodermus planus. 



planus, Erichs. Arch. Naturg. viii. 282, pi. 5, f. 9. 



Tasmania. 



a, b. South Australia. Presented by R. Bakewell, Esq. 

 c. South Australia. From Mr. Stevens' collection. 



2. Isodermus vacillans. 



Mas. Fulvus, nitens, transverse et sxibtilissime rugulosus, postice lates- 

 cens ; caput parvum, cornn frontali porrecto lanceolato ; antenna 

 breves, articulo 2o \o plus duplo longiore ; prothorax fascia postica 

 pallidiore, lateribus subrotundatis ; pedes breves, femoribus robustis ; 

 alec anticce abdominis apicem non attingentes, corio parvo, membrana 

 nigricante. 



Male. Tawny, flat; shining, transversely and very finely rugulose, 

 widening from the head to near the tip of the abdomen, which is rounded. 

 Head small; a lanceolate horn in front, longer than the first joint of the 

 antennas. Eyes not prominent. Rostrum as long as the head. Antennae 

 less than one-third of the length of the body; second joint more than twice 

 the lengtb of the first. Prothorax with a paler band near the hind border, 

 narrower in front; sides slightly rounded. Legs short; femora stout. 

 Fore wings extending to three-fourths of the length of the abdomen; 

 corium small; membrane blackish. Length of the body 2^ lines. 



a. Tasmania. Presented by the Entomological Club. 



