1908.] Records of the Indian Museum. 239 



Locality of capture. — Dhappa, near Calcutta, slightly brackish 

 water, 270 specimens, 4 — 7 mm. long ; Port Canning, lyower Bengal, 

 brackish water ponds, 117 specimens, 4 — 7 mm. long. 



M. orientalis is apparently an abundant species in suitable 

 localities. 



