42 
CATALOGUE OF 
Genus 14. ELASMODEMA. 
Elasraodema, Stal , Rio Jan. Hem. 68. 
1. Elasmodema Erichsonl 
Erichsoni, Stal , Rio Jan. Hem. 68. 
Rio Janeiro. 
This and the following genus are perhaps more allied to the Nudiroslra 
than to the Corticolae, and may form a family of the former when a few 
more forms to be associated with them are known. 
Genus 15. JSODERMUS. 
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 sublilissime rugulosus, postice lates- 
cens ; caput parvum, cornu fronlali porrecto lanceolato ; anlennce 
breves , articulo 2 o lo plus duplo longiore ; prothorax fascia postica 
pallidiore , lateribus subrotundatis ; pedes breves, femoribus robustis ; 
alee 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 
antennae. 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 length 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. 
