38 GEO. H. IIOKN, M. D. 



arise. Within each lobe is a slight arcuate impression while another 

 feebler impression extends from the base of the antennas toward the 

 middle of the base. Head beneath with a long but feeble triangular 

 impression broader in front. Anterior margin with a median emar- 

 gination for the mentum, on each side a deeper notch for the maxillae 

 limited externally by a moderate lobe which covers the base of the 

 mandible. 



Eyes, — These consist of six ocelli situated around a- brownish spot 

 immediately behind the insertion of the antennae. 



Antenna are situated immediately behind the base of the mandi- 

 bles, about one-third the length of the body, four jointed. First 

 joint somewhat stouter than the others, nearly half the length of 

 the head, glabrous, second joint more th.au twice the lengtlr of first 

 also glabrous, third slightly longer than second and fourth a little 

 longer than the third and more slender, these two joints are pubescent 

 and opaque. 



Mandibles moderately long, arcuate and with a strong acute tooth 

 at basal third. 



Maxilla consist of a stout, cylindrical basal piece supporting at 

 its extremity two appendices an inner and an outer, the former two 

 jointed the first joint longer and stouter than the second which is 

 rather slender; the outer appendix is three jointed, twice as long as 

 the inner, the basal joint short and stout, the second more slender 

 and twice as long, the third more slender and half the length of 

 the preceding. 



Mentum broader than long, trapezoidal, narrower posteriorly, 

 obliquely truncate at each distal angle and bearing a two jointed 

 palpus the joints of which are short stout and nearly equal in length, 

 the terminal oval at tip. 



Prothorax sub-hexagonal, the angulation of the sides behind 

 the middle, surfoce greenish blue, sub-opaque, semicorneous, a distinct 

 median fine line and on each side a feeble oblique impression. 



Meso- and Metathorax similar to the prothorax but shorter and 

 broader. 



Abdomen. — The first two segments are shorter than the others and 

 equal, segments 3 — 8 sub-equal and longer than the first two. The 

 surface is covered with a transverse semi-corneous scute, similar to the 

 thoracic pieces, the scutes being each gradually broader from 1 — 4, 

 then gradually narrower from 5 — 8, each has a fine median line. 

 The ninth segment is much narrower than the others and is pro- 



