Abstract
The author found a female elephant louse on an Indian elephant at Maruyama Zoological Garden in Taihoku last January. That is closely related in most important points to Haematomyzus elephantis which was found by Piaget.
Only differences between both specimens are as follows:
1. There are four double hooks on the posterior part of proboscis tip, instead of three in Piaget's specimen.
2. Four ridges are formed lengthwise on the surface of occiput, while Piaget's specimen has three ridges in the same place.
3. There are brownish shieldform or heartshaped blotches along the margins of six anterior segments of the abdomen. Piaget's specimen has subquadrangular blotches.
4. There are eight rows of nipple-like oval process on the ventral surface. The first and second rows are located on the thorax and connect in their both ends. The Processes on the first row are nine in number, and on the second row are eighteen.
