342 ENTOMOLOGICAL SOCIETY 



depression extending entirely across the head ; two deeply impressed foveae 

 or pores near the middle of the head. Clypeus prominent, arcuate, with 

 a tubercular prominence on either side, the thickened margin fringed 

 below with spinulous hairs; deep emarginations of the frontal margin 

 separate these prominences from the elevated anterior angles of the head. 



Ocelli six, placed immediately behind the antennas, four on the upper 

 surface' and two on the lower surface of the head, the middle pair on the 

 verge of the marginal ridge. 



Antennae supported on elevations of the anterior angles of the head, 

 shorter than the mandibles, consisting of a thickened fleshy base and 

 three cylindrical joints; the first joint stout, 'transverse ; the second more 

 slender, elongate ; the last joint shorter than the preceding, tapering, 

 rounded at the tip, with a terminal pore. 



Labrum a trapezoidal glabrous plate completely enclosed within the 

 buccal cavity, of which it forms the roof; a fringe of hairs on the posterior 

 border closes the opening of the oesophagus. 



Mandibles about one-third as long as the head, stout, falciform, basal 

 half thickened, distal portion more strongly curved from a sinus near the 

 middle, deeply channelled inside, forming sharp cutting edges, the inferior 

 edge with a single sharp denticle and several very minute serrations near 

 the middle. 



Maxillae longer than the mandibles, the base thickened, elongate, cylin 

 drical, obliquely truncate at tip, bearing a four-jointed palpus and a two- 

 jointed inner lobe ; the first two joints of palpus subequal, as wide as long ; 

 the third joint equal to the two basal joints in length, enlarged at tip; 

 terminal joint longer than the preceding, more slender, truncate at tip; 

 the joints of the inner lobe subequal in length, the first thickened an 

 teriorly, the terminal joint acuminate. 



Labium consisting of a broadly transverse, three-lobed mentum with 

 straight borders, surmounted by a transverse, trapezoidal ligula, widen 

 ing anteriorly, with a row of short bristles beneath near the anterior 

 border, and bearing short, two-jointed palpi, the basal joint as wide as 

 long, the terminal joint three times as long as the preceding, tapering 

 to a blunt point. 



Prothorax more than twice as wide as long, narrowed anteriorly, sides 

 moderately arcuate, anterior angles produced rectangular, hind angles 

 rounded; the two following segments subequal, together slightly exceed 

 ing the prothorax in length, sides arcuate and angles rounded. 



Legs moderately long, subequal and similar, of five cylindrical joints 

 and two claws ; coxa stout, elongate; trochanter rather slender, curved, 

 pointed at both ends; femur nearly as long as the coxa; tibia shorter, 

 twice as long as wide ; tarsal joint longer, more slender, ending in two 

 short, simple claws, slightly curved, thickened at base and divergent at 

 the tips; all the joints sparsely covered with minute spines, longer and 

 more numerous on the inner edge. 



Abdomen of eight segments, and a pair of anal stylets (9th segment ?) 



