BY A. M. LEA. 729 



distinctly wider than elj^tra, parallel-sided to near apex, epi- 

 pleural fold narrow but traceable almost to apex. Prosternum 

 with propleural triangles each with a narrow carina internally, 

 and a still finer one externally, the two touching the apex at a 

 slight distance (about equal to the length of the second joint of 

 antennte) from each other. Metasternum with episterna narrow 

 and parallel-sided. Abdomen with first .segment at the side 

 about as long as the fifth along middle. Legs rather long: inner 

 half of hind coxa? moderately long (about half the length of 

 .second segment of abdomen), then strongly narrowed to sides; 

 tarsi moderately long, second, third, and fourth joints of exactly 

 the same shape but decreasing in size; claws each with an obtuse 

 swelling at base. 



The prothorax is very aberrant for the family, but the com- 

 bination of entire absence of a visible labrum, mandibles closely 

 applied to the breast and concealing the palpi within the buccal 

 cavity, intercoxal process of prosternum narrow and received 

 into a deep groove in the mesosternum, and abdomen with five 

 segments, forbid its being placed in any other family. The face 

 is vaguely suggestive of some females of the Rhijndoceridcc. In 

 Blackburn's Table, the genus would be associated with Lycaon 

 ( = Hemiopsida), with some features of which it agrees, but the 

 base of the prothorax is at once distinctive from that, as from 

 all other Australian genera. There is nothing at all approaching 

 it in the Plates accompanying Bonvouloir's monograph. The 

 punctures of the head and prothorax are remarkable. The ex- 

 ternal face of the mandibles ^s densely punctate, the punctures 

 (except towards the base) within a depression enclosed by shining 

 carinse, which meet near the tips. 



DiCTYEUCNEMIS MIRUS, n.sp. 



Blackish-brown, or castaneous-brown, appendages somewhat 

 paler. With not very dense, and very short, whitish pubescence. 



Head with large, shallow, net-like punctures, margined by fine 

 carinse, and with the inner part of each puncture flat and 

 shagreened; antennary sockets almost as far apart as the length 

 of the three basal joints of antenna?. Antennae extending almost 



56 



