112 Proceedings of the Royal Society of Victoria. 



The synopsis of genera gives to Medmassa "sternum tenuiter 

 vel vix distincte marginatum," and the specification of the genus 

 gives " margine inferiore sulci quadridentato rarissime bidentato 

 vel quinquedentato. Sternum haud marginatum." 



Medmassa bicolop, nov. sp. (PI. XVI., Fig. 4). 



Cephalothorax black-brown, with fine granulations on the 

 surface, and white closely-lying feathered hairs in patches round 

 the margin and along the median line. 



The mandibles are black-brown at base, apex and fangs not so 

 dark a brown ; upstanding long brown hairs. 



Lip and maxillae, brown, with reddish orange edges. Sternum, 

 black-brown, with fine down-lying white hair. Abdomen, black- 

 brown, with irregular patches of white feathery hair on both 

 upper and lower surface. Spinnerets and epigyne rather lighter. 



The coxae of all legs, and whole of the two rear pairs of legs 

 are black-brown, as is also the upper half of the femur of the two 

 front pairs ; the remainder of these two pairs, bright orange- 

 yellow. White feathery hair interspersed with upstanding brown 

 bristles on the darker portions, and brown hair on the yellow 

 parts. 



The Cephalothorax is moderately convex, rather long ovate, 

 square in front, and rounded at the sides, faint shallow depressions 

 separating the thoracic from the cephalic part, with two more at 

 each side. A short median furrow at head of rear slope. 



The Mandibles are conical, strongly kneed at base, longer than 

 patella, and as thick as femur of front legs. Only two teeth 

 visible on inner edge of falx sheath. 



The rear row of Eyes is strongly procurved'. They are equal in 

 size ; the two middle three-quarters of a diameter apart, and one 

 diameter from the side. The front edges of the front row are in 

 a straight line ; the middle the same size as the rear, three-quarters 

 diameter apart ; the side eyes, oval and smaller, almost touch the 

 middle ; the end of their long diameter, which slopes upwards 

 and outwards, is the diameter of the larger eyes distant from the 

 rear side. The median quadrilateral is clearly longer than broad. 



The Maxillae are upright, convex, the upper margin slightly, 

 and the outer more strongly curved, they are broadest across the 



