109 



Adult female (Fig. 1) — Yellowish beneath white cottony secretion, 

 elongate oval, length 1.35-2.15 mm.; width .45-. 80 mm. Segmentation 

 distinct. Integument for the most part without especial chitinization. 

 and colorless in boiled and cleared specimens — a chitinized yellow sub- 

 oval or subcircular spot (.05 mm.), however, near each lateral margin 

 on ventral surface of penultimate segment, and on preceding segment, 

 somewhat more mesad, a paler, vulviform chitinization. Also both 

 ventral and dorsal surfaces bear spiny hairs of different lengths inter- 

 spersed with wax gland openings of two distinct types. The shortei' 

 hairs are much more numerous than the longer and are found over the 

 entire surface, densely crowded in the center of the segments, in the 

 furrows less conspicuous or absent. The longer hairs are more partic- 

 ularly apparent on the front of the head, the two last abdominal seg- 

 ments, and in transverse rows on the abdominal segments. The com- 

 moner wax gland openings are circular in shape (fig. 4b) and vary con- 

 siderably in size. They are very generally distributed over the surface 

 and are interspersed with the less common large circular and very 

 large triangular gland openings (fig. 4a). The antennae (fig. 2) are 

 inserted somewhat on the ventral surface, short, approximate at their 

 bases, six segmented, six longest (.054 mm.), a third longer than one 

 (.0o6 mm.), two, three, four and five subequal, about one-third of six 

 (.02 mm.). Formulae: 



6, 1, (2, 3, 4, 5) 



6, 1, 3, (5, 4, 2) 



6, 1, 2, 3, 4, 5 



6, 1, 2, (3, 4), 5 — 



all the segments bearing hairs. They are more numerous, however, on 

 the last segment, which also bears three pairs of stout, thread-like 

 processes. The legs (fig. 3) are short and stout, the three pairs sub- 

 equal, femur scynewhat longer than tibia and nearly twice as thick, 

 tibia (.04 mm.) only slightly less than tarsus (without claw), claw 

 long, thin, only slightly curved, without digitule, the femora beset with 

 hairs, the tibiae and tarsi with hairs and spines. Mentum dimerous 

 and hairy near the tip. Anal opening elliptical, the long axis trans- 

 verse, anal ring bearing six spines, placed '.t the base of the caudal 

 lobes, perianal glands in two rows, the inner running inside, the outer 

 outside the anal spines. Caudal lobes well-developed, each bearing a 

 huge chitinous tooth or hook. Pairs of similar but smaller chitinous 

 structures, both directed backward, are found on the dorsum, one just 

 dorsad of the anal ring, the other on the head. 



Originally described from Ceylon, on the roots of grass. 

 Habitat in Hawaii : Tantalus, on the roots of koa (Acacia hoa) ; 

 Honolnln, on the roots of mango (Maf/nlfcm Indica) and nut- 

 grass (Cy penis rofiinrhis). 



