52 J. Shephard: 



Order III.— PLOIMA. 



Sub-Order.— ILLORICATA. 



Family. — Microdidae. 



Microdon. 



M. rIavKS, Ehrenberg'. Springvale. 



Family. — Asplaxchnadae. 

 *A. hrig])tu'(-nii. 

 A. amphoia, Hudson. Brighton, Cauliield. 

 There are several other forms of this genus commonly found 

 presenting characters somewhat inconsistent with described 

 species, and further investigation is necessary to elucidate them. 



Asplanchnopus. 



"^A. myrmeleo. 



Sacculus. 



S. riridis, Gosse. Mr. Stickland. 



Syncheta. 

 *S. pectinata. 

 *S. tre inula. 

 S. haUira, Ehrenberg. • Open Avater of Port Phillip, 



Family. Triarthradae. 



Polyarthra. 

 */*. pldtyptera. 



T Pi art ha. 



*T. longiseta. 



Family. — Hydatixadae. 



Hydatina. 

 *7/. sell fa. 



