154 Proceedings of the Royal Society of Victoria. 



narrower and subequal, the third half the length of the second, 

 and each is sparsely setose. The flagellum is composed of about 

 thirty joints, each with a series of radially arranged short sette, 

 and is nearly twice as long as the peduncle. The secondary 

 appendage is short, and consists of four joints. 



Lower Antennce. — The lower antennae are about one-thiixl less 

 in length than the upper antennse. The peduncle consists of 

 only three free joints, and measures slightly longer than the 

 peduncle of the upper antennae ; the first joint is veiy short, the 

 second long and stout, and the third thin and of equal length to 

 the second. Each possesses a few setfe, disposed in pairs. The 

 flagellum is of about similar length to the distal joint of the 

 peduncle and is composed of from seven to nine joints. 



Upper Lip (Fig. 2). — The upper lip is subspherical in outline, 

 margin entire, and densely clothed distally with short seta?. 



Alandibles (Figs. 3 and 4). — The mandibles differ slightly from 

 each other in the cutting edge and other minor details ; that of 

 the left side bears two rows of pointed teeth, while that of the 

 right has a single row of pointed teeth. 



The right is shown in Fig. 3 with the outer side uppermost, 

 and consequently the molar tubercle is not seen. The cutting 

 edge terminates in a single row of four pointed teeth, and 

 between them and the molar tubercle is a bunch of broad, 

 lanceolate spines, one edge being finely serrate, and the other, 

 and also the broad side, fringed with fine filamentous setje 

 (Fig. 3^). 



The left mandible is shown in Fig. 4, with the inner surface 

 uppermost. It has the cutting edge bearing two rows of pointed 

 teeth, widely separate distally, but united proximally ; and 

 between them and the base of the molar tubercle there is a 

 bunch of stout plumose setaj (Fig. \a). The molar tubercle 

 presents no special features. The palp, which is similar in both 

 mandibles, is long and composed of three joints. The fii*st joint 

 is the shortest, it widens slightly distally. The second is 

 broader and twice the length of the first ; it bears on its lower 

 border, distally, three spines near together and pointing 

 downwards, one of which is very long ; also a long spine 

 equi-distant between the proximal and distal ends, which point 

 directly downwards. The terminal joint is not quite so long as 



