364 



metanotum transverse, the posterior margin concave, suture not prominent- 

 Abdomen smooth, poHshed, the fifth and sixth segments widest, narrowing pos- 

 teriorly; last dorsal segment large, transverse, narrowed posteriorly, a median 

 sulcus and lateral sulci distinct; a swelling on posterior margin above the keel 

 of forceps. Forceps short, stout, subcontiguous, above with a keel ; inner 

 margin with a number of small teeth on basal half. 



Head black with the antennae brown. The thorax brownish, the abdomen 

 brownish-black becoming darker posteriorly; the last dorsal segment and 

 forceps somewhat reddish-brown. Legs light brown, with a darker area on 

 anterior margin of femora. Length, 10 mm. 



Fig. A. 



Anisolabis ausfralis, Tindale. 

 Male. 



5 . Similar to the male, larger, antennae 13- jointed, the forceps contiguous,, 

 stout, more sinuate on outer margin. Length, 12 mm. 



Hab. — South Australia: Pearson Island (T. D. Campbell, F. Wood Jones), 

 Spilsby and Reevesby Islands (N. B. Tindale). Types, I. 14430. 



The species is represented from Pearson Island by five immature specimens 

 and one damaged female. The type specimens were taken together under a 

 stone on Spilsby Island and were at first confused with the cosmopolitan 

 A. annulipes, Lucas, but a comparison with Adelaide specimens of that species 

 shows them to be quite distinct. The male has the forceps of a different type, 

 more symmetrical, wider at base, and less incurved at apex. The number of 

 joints of the antennae in the thirteen specimens examined ranges from 12 to 14,., 

 and the 14- jointed specimens are all males. 



EXPLANATION OF PLATE XXXIL 



Fig. 1. Platyzostcria brunnca, Tepper, male, Pearson Island. 

 „ 2. ,, „ „ type female, Gilbert River. 



„ 3. Peakcsia palliata, Sjostedt, female, Ooldea. 

 „ 4. „ ritgosa, Tindale, type female. Greenly Island. 



„ 5. „ „ „ cotype female, Greenly Island. 



