216 lAPYX. 



lapyx gig as i Brauer. 



lajpyx gigas, Brauer. Wien. Zool. Botan. Gesells, 1869, p. 557. 



Antenn86 50-jointed, sometimes a quarter, sometimes 

 half the length of the body ; the two basal segments 

 cylindrical, the following ones rather thicker, sphe- 

 rical, the rest gradually tapering. The abdomen 

 becomes gradually broader behind, the seventh segment 

 being the broadest. The dorsal plates of the six first 

 segments are rounded at the sides ; the seventh is very 

 convex at the sides, the posterior angle being produced 

 into a strong point, which is somewhat inclined in- 

 wards ; the eighth segment is one third shorter 

 and somewhat smaller than the sixth, and has 

 also the posterior angles produced, but straight; 

 the ninth segment is only half as long as the 

 eighth, the angles somewhat pointed. The first seven 

 segments have at the sides and underneath short 

 3-jointed appendages, which point backwards. The 

 tenth segment with the forceps is as long as the four 

 preceding rings together ; the forceps being scarcely 

 shorter than the segment. The right arm of the 

 forceps is much broader than the left ; the basal half 

 bears on the inner margin two strong teeth, and an 

 elevation near the basis ; the concave terminal portion 

 bears sawlike teeth, which are stronger towards the 

 middle. The left arm of the forceps is broader at the 

 base, and then becomes thinner, after which it remains 

 almost of the same breadth nearly to the point ; 

 towards the middle of the inner edge is a blunt tooth, 

 in front of and behind which, the edge is slightly con- 

 cave ; the first part, that is to say, the basal third of 

 the forceps arm, has 4-5 larger teeth, and then is very 

 finely notched as far as the above-mentioned middle 

 tooth, after which again the terminal portion is very 

 finely serrated, so finely, indeed, as to almost smooth. 

 In one individual there was an elevation on the right 

 arm of the forcej^s just before the point. The arrange- 



