ERIC MJÖBERG, PTINID^. 7 



B. Antennse more ore less modified, either 11-jointed with 

 the lOth joint enlarged, 10- or 9-jointed with the pen- 

 ultimate one enlarged, or 6-jointed with the two api- 

 cal joints stongly enlarged. Head mostly constricted 

 behind the antennse, eyes small more ore less rudi- 

 mentary. 



1. Antennae 11— 9-jointed with the penultimate joint 

 enlarged or 6-jointed with the two last joints en- 

 larged. Subfara. Polyplocotince. 



Genera: Polyplocotes Westw., Diplocoies Westw., 

 Decemplocotes M., Enasiha Oll., Hexaplocotes 

 Lea. 



Distribution: Australia, Tasmania. 



2. Antennae strongly laterally compressed, leaf-like, 

 either 11-, 10- or 9-jointed. 



Subfara. Paussoptinidce. 



Genera: Paussoplinus Lea, Leaptinus M., Pausso- ' 

 • ceros M. 

 Distribution: Australia. 



3. Antennae with reduced number of joints, the last 

 compressed, more or less grown together and 

 forming a sort of a flat club. 



Subfam. Ectrephince. 



Genera: Ectrephes Fascq-e, MesectrephesM., Mon- 



ectrephes M. 

 Distribution: Australia. 



Key to the Åustraliaii and Tasmauiau Genera of Myrme- 



cophilous Ptinidae. 



I. Subfam. Polyplocotince. 



A. Antennae 11-jointed Diplocotes Westw. 



B. Antennae 10-jointed, the next last joint enlarged. 



a. Prothorax without an impressed median line. Legs 

 of normal length Decemplocotes m. 



b. Prothorax with a strongly impressed median line. 

 Legs slender Enasiha Oll. 



