'Jö AET. n. — A. IZÜKA : 



longer than the ventral ; the latter, arising from mid -dorsal border 

 of the former, is short and is provided with a short, 

 conical process on the ventro -lateral margin. Ventral cirrus short 

 and smooth, arising jnst opposite dorsal ramus and reaching 

 to about the ventro -lateral angle of ventral ramus, Dorsal cirrus 

 very long, slender, smooth, arising a little distance from the 

 base of dorsal ramus ; length of the cirrij^hore about equal to that 

 of dorsal ramus ; style slightly pigmented near tip, extending far 

 beyond tip of ventral bristles. 



The length of dorsal cirrus increases from the 3rd segment 

 posteriorly to the last cirriferous segment, in whicli it reaches a 

 length more than twice that of the 3rd dorsal cirrus. Anal cirri 

 are of about the same length as tlie last dorsal cirri. 



Elytra in 16 pairs, borne on segments 2, 4, 5, 7 



21, 23, 26, 29, 32, 35. They are generally oval, their inner 

 margins just meeting in the anterior parts of dorsum, but slightly 

 overlapping in the posterior parts ; provided with neither cilia nor 

 papillae. 



Superior dorsal bristles somewhat rod-like, distally slightly 

 tapering, with rounded tip (fig. 9). Inferior dorsal bristles slender, 

 tapering to fine point, serrated (fig. 10). Superior ventral 

 bristles, somewhat similar to the last, but more stout, and more 

 strongly serrated, provided with slightly curved terminal liook 

 (fig. 11). Inferior ventral bristles shorter and stouter than superior 

 ventral (fig. 12). All these bristles are of a light yellowish- 

 brown tint. 



Nephridial papilla? occur from the 7tli segment posteriorly to 

 the 34th segment. 



A large mass of eggs are borne under elytra at the end of 

 March. 



