82 



Type, 



a slide. 



-I. 2002, South Australian Museum. A male on 



pulcherrimus, Dodd 

 speciosus, Dodd 



my ma rip en nis, Dodd! 



Table of Australian Species of Trimorus, Foester 



Males; females. 

 I. Head black; thorax bright reddish- 

 brown, the scutum sometimes 

 black ; mesal portion of abdomen 

 reddish-brown ; males. 



(a) Scutum mostly reddish-brown ; 



punctures on head and thorax 

 rather sparse 



(b) Scutum wholly black ; punctures 



on head and thorax dense 

 II. Body wholly black, except sometimes 

 base of abdomen. 



A. Forewings very slender and grace- 



ful ; longest marginal cilia equal 

 to greatest wing width ; male . . . 



B. Forewings not especially slender; 



the longest marginal cilia not 

 equal to one-half greatest Aving 

 width. 



(1) First abdominal segment much 



wider than long. 



(a) First segment reddish-yellow ; 



mesonotum with fine, dense 

 punctures; female 



( b) Abdomen wholly black ; meso- 



notum with scattered punc- 

 tures; male 



(2) First abdominal segment scarcely 



wider than long, or a little 

 longer than wide. 



(a) First segment reddish-yellow ; 



males. 



Mesonotum with fine, poly- 

 gonal sculpture 



Mesonotum with scattered 

 punctures 



(b) Abdomen wholly black; males, 



females 



nigripes, Dodd 



niger, Dodd 



australis, Dodd 



assimilis, Dodd 

 nigrellus, Dodd 



Pentacantha australica, sp. nov. 

 9 . Colour as in Hoplogryon sordida, Dodd, but the first 

 abdominal segment is golden-yellow. Structure as in 

 Trimorus nigripes, Dodd, but the proximal, as well as the 

 posterior, angles of the metanotum have short spines; the 

 parapsidal furrows are wanting; the first abdominal segment 

 is longer than wide, and has a short blunt horn. Antennse 

 and forewings as in Trimorus nigripes. Length, 1*10 mm. 



Hah. — North Queensland : Nelson. Common along edges 

 of small streams in forest. 



Type. — I. 2003, South Australian Museum. A female 

 on a slide. 



