148 
Psyche 
[December 
without minor clawlets posterior to the major clawlets; 
small setae-bearing tubercles present on ventral side of 
fourth palpal segment. 
Limnesia {Limnesiella) marshallae (Viets) 
Figs. 3, 6, 8 
Limnesiopsis anomala Marshall (in part), 1932. Trans. 
Wisconsin Acad. Sci., 27 :346. 
Limnesiopsis anomala marshallae Viets, 1938. Zool. Anz. 
121:134. 
Limnesia hutchinsoni Lundblad, 1941. Ibid., 133:158. 
(non) Lhnnesia marshallae hundblsid, 1941. Ibid., 133:157. 
Limnesia marshallae Lundblad, 1952. Arkiv for Zool. (Ser. 
2), 3:525. 
Male: Length of body 1.15-1.72 mm; length of genital 
field 0.27-0.35 mm; width of genital field 0.30-0.37 mm. 
Body rounded, integument soft; a single, median scle- 
rite, approximately 0.087-0.120 mm in diameter, present 
near posterior edge of dorsum; acetabular plates united 
at both ends, genital opening much greater than one-half 
total length of genital field ; outer margin of acetabular 
plates concave; 22-27 genital acetabula present on each 
side, these roughly grouped into two circles of small 
acetabula surrounding the two pairs of larger acetabula; 
apodemes of posterior border of the third coxae incom- 
plete, ending near setigerous gland of fourth coxae. 
Palpi swollen at distal end of second segment, peg di- 
rected posteriorly, similar to that found in Limnesia macu- 
lata (Muller) ; dorsal lengths of the palpal segments were: 
P-I, 0.035-0.041 mm; P-II, 0.192-0.216 mm; P-III, 0.132- 
0.152 mm; P-IV, 0.282-0.335 mm; P-V, 0.059-0.074 mm; 
swimming hairs present on third and fourth pairs of legs; 
claws with only two major clawlets. 
Female: Length of body 1.72-2.13 mm; length of genital 
field 0.28-0.36 mm; width of genital field 0.23-0.31 mm; 
width of pregenital sclerite 0.21-0.23 mm; female similar 
to male except in size and structure of the genital field; 
acetabular plates not united, 22-23 acetabula on each side, 
these grouped as in male. 
Habitat: Usually found in lakes, often in rather deep 
