540 IVAR TRAGARDH 



edge is even ; pilus basalis is stout and blunt, inserted exter- 

 nally, a little above the middle, and a little in front of the base 

 of calcar niandibnli. 



The pal pi (fig. 28 a, c). Joint I withthin ventral edge 

 behind the posterior hair, which is inserted submarginally, 

 and exteriorly ; anterior hair on a low tubercle, stouter and 

 blunter than the posterior one, and only curved at the top, 

 where it is slightly hairy. 



Joint II as usual, sUghtly pyriform, widening distally ; 

 ventrally and distally with one unipectinate bristle, widening 

 to a thin blade at the top (fig. 28 b). 



Joint III with the usual two, chisel-shaped bristles. 



Joint IV with no spécial features ; joint V with a large tri- 

 pectinate bristle whose branches are of remarkable shape. being 

 of uniform width throughout, and truncated at the top (fig. 28 a) . 



Hypostoma (fig. 30). The 3 anterior hairs are placed close 

 together at the base of the maxillary lobes, thier places of inser- 

 tion forming an equilateral triangle ; the fourth is placed behind 

 the middle, more laterally. 



The maxillary lobes (fig. 29) are articulated to a somewhat 

 raised portion of the hypostoma ; they are blunt at the top, 

 and curved at a right angle ; the ventral edge has a large, 

 oval, anteriorly rounded blade attached to it, which projects 

 on to a level with the top of the lobe. Between the maxillary 

 lobe and the maxillary plate there is a small, poniard-shaped 

 appendage. 



The maxillary plates attain a length of twice that of the 

 lobes, and are narrow, lanceolate ; at the base an oval, distally 

 rounded, thin blade is detached, which has about 8 long, narrow 

 teeth ; the distal third of their edge is even, the remainder is 

 finely fringed, the fringe attaining a width of thrice that of 

 the plates. 



Ventral side without any peculiar characteristics. 



Legs (figs. 32-35). 



Legs I are long and slender ; coxa laterally flattened and bent 



