234 



Mr. Lea also took one near Cairns. The species, so determined, 

 is very variable in colour, varying from concolourous-green or 

 blue, above and beneath, to specimens in which the elytra has 

 the base, suture, and sides red, with more or less red on the 

 coxae and underside. The type is described as being of the 

 latter class. 



Byrsax pinnaticollis, n. sp. 



Rather squarely oval ; reddish-brown, tarsi and antennae 

 red, clothed with a short scaly indumentum. 



Head (of male) with two elevated, incurved, and pointed 

 horns, serrated on the outside edge ; antennae short, the last 

 four joints forming a club, the apical joint longer than the 

 preceding. Prothorax about lo x 3 mm., sides widely rounded, 

 and like the fins of a fish, the outside edge strongly and evenly 

 crenulated, discal portion very convex, with two conspicuous 

 elevated tubercles on middle near front margin, and with 

 sparse irregular tubercles elsewhere. Scutellum rounded. 

 Elytra wider than prothorax at base, with humeral angles 

 prominent and rectangular, widely rounded behind, margins 

 evenly and closely crenulated ; seriate-punctate, the intervals 

 .with from four to six tubercles on each, more or less in rows, 

 the rather wide margins also bearing a few tuber- 

 cles. Underside and legs rough, the abdomen rugose-punc- 

 tate. Female without frontal horns. Dimensions — 5 x3 mm. 



Hob. — Queensland: Cairns (A. M. Lea and Macleay 

 Museum). 



Intermediate in size between B. macleayi, Pasc, and 

 B. egenus, Pasc, it has not the pronounced oblique thoracic 

 tubercle of B. saccharatus, Pasc, and with much more regu- 

 larly-crenulated sides. I have named it as describing the lobate 

 and finlike flanges of the prothorax. I think I have specimens 

 of all the described species of Byrsax. B. saccharatus, Pasc. 

 (of which my single specimen comes from the Richmond River) 

 is either without frontal horns, or has been described from a 

 female specimen. B. macleay i I have taken in quantity at 

 Acacia Creek in rotten logs. It is remarkable for the pungent 

 musk smell emitted, by which its presence may be detected 

 at some distance. Types in the author's collection. 



AUSTRALIAN AMARYGMIN^E. 



Since the publication of my tables of Chalcopterus and 

 Amarygmus (these Trans., 1913) I have received further in- 

 formation from Mr. K. G. Blair, of the British Museum, which 

 enables me to correct certain mistakes, partly due to insuffi- 

 cient descriptions, partly to my incorrect determination of a 



