150 Psyche [December 
two-fifths distance between posterior ends of third and 
fourth coxae. 
Palp swollen near distal end of second segment, peg di- 
rected outwards; setae present on fourth segment but 
these not on well developed tubercles; dorsal lengths, in 
millimeters, of the palpal segments varied as follows: P-I, 
0.036-0.041 mm; P-II, 0.116-0.128 mm; P-III, 0.095-0.108 
mm; P-IV, 0.160-0.169 mm; P-V, 0.047-0.052 mm; swim- 
ming hairs present on third and fourth pairs of legs; claws 
with two major clawlets. 
Female: Length of body 1.27-1.39 mm; length of genital 
field 0.24-0.30 mm; width of genital field 0.19-0.23 mm; 
width of pregenital sclerite 0.16-0.17 mm. 
Female similar to male except in size, structure of the 
genital field and in having the setigerous glands of the 
fourth coxae much closer to the third coxae than in the 
male; acetabular plates not united, with 12-18 genital 
acetabula on each side, these arranged as in male; palpal 
segments averaging slightly larger than in male. 
Nymph: Length of fully grown nymph approximately 
0.55-0.59 mm. ; length of provisional genital field 0.085- 
0.091 mm; width of provisional genital field 0.123-0.128 
mm. 
Provisional genital field with only two pairs of acetabula, 
apodemes forming a cross (Fig. 10) ; three pairs of setae 
present on provisional genital field ; palps resembling those 
Explanation of Plate 11 
Fig. 1. Limnesia ( Limnesiopsis) anomala Koenike, ventral view, male. 
Fig. 2. Limnesia (Limnesiopsis) anomala Koenike, ventral view of third 
and fourth coxae, and genital field, female. Fig. 3. Limnesia (Limnesiella) 
marshallae (Viets), ventral view of third and fourth coxae, and genital 
field, female. Fig. 4. Limnesia (Limnesiella) eggletoni n. sp., ventral view, 
male. Fig. 5. Limnesia (Limnesiella) eggletoni n. sp., ventral view of 
third and fourth coxae, and genital field, female. Fig. 6. Limnesia (Lim- 
nesiella) marshallae (Viets), ventral view, male. Fig. 7. Limnesia (Lim- 
nesiopsis) anomala Koenike, palp, male. Fig. 8. Limnesia (Limnesiella) 
marshallae (Viets), palp, male. Fig. 9. Limnesia (Limnesiella) eggletoni 
n. sp., palp, male. Fig. 10. Limnesia (Limnesiella) eggletoni n. sp., pro- 
visional genital field, nymph. Fig. 11. Limnesia (Limnesiella) eggletoni 
n. sp., claw, male. Fig. 12. Limnesia (Limnesiopsis) anomala Koenike, 
claw, male. 
