A DISCUSSION ON BEEATHINa 



141 



of the trunk and tlie epiraera and by two ducts under the 

 insertion of the pleon. In Ethusa the case is the same. 



Fig. 11 —Ranina scabra (Fabricius), a male specimen, with separate figure of the pleon 



[de Haan]. 



In Calappa and Matida the hinder ducts are not below but 

 close to the plaon over the first joints of the fifth pair of 



