heakle: isopoda. 



.'iOo 



ONISCIDAE. 



Philoscia australis, sp. nov. 



Body ovate, u little more tluin twice as long as wide 4^ nun. : 10 iiiiii. 

 (not including uropoda). 



Head two and a half times wider than long, 1 mm. : '21 mm. Front 

 not margined, without median or lateral lobes. Eyes rather large, 

 composite and situated in the lateral 

 angles of the head. First pair of anten- 

 nae minute, inconspicuous. Second pair 

 of antennae with the first article of the 

 peduncle short; second and third articles 

 subecjual, and each about twice as long 

 as the first article; fourth and fifth arti- 

 cles subequal and each twice as long as 

 the third. The flagellum is composed of 

 three articles, decreasing successively in 

 length. The second pair of antennae are 

 longer than half the body and extend 

 to the posterior margin of the fifth tho- 

 racic segment. 



The first three segments of the thorax- 

 are each a little longer than any of the 

 last four, which are about equal in length. The lateral margins of 

 the segments are straight and tlie epimera are not separated from the 

 dorsal portion. The postlateral angles of the seventh segment are 

 somewhat truncate. 



The al)domen is very abruptly narrower than the thorax, being just 

 half as wide, 2 mm. while the last thoracic segment is only 4 mm. in 

 width. The first tw^o segments 



Philoficia aualralia . 



^^^ 



are partly covered at the sides 

 by the seventh thoracic seg- 

 ment. The first five segments 

 are about equal in length. The 

 sixth or terminal segment is tri- 

 angular w^ith apex rounded. 



The uropoda are long. The 

 peduncle is twice as long as the 



terminal abdominal segment (measured on the exterior margin). The 

 inner branch is twice as long as the peduncle (measured, from the 



Fig. 9. — Philoscia austral is. 

 antenna. 26. X 



Second 



