124 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
iw) 
LIVERPOOL BIOLOGICAL SOCIETY. 
EXPLANATION OF PLATE IV. 
. Monstrilla longicornis, n. sp., male, 
. Do. seta of swimming feet, 
. Feathery plume on inner side of apical 
segment of antenne of male Monstrilla 
anglica, Lubbock. 
. Seta of furcal members of MW. longicornis, 
. Spines on second and third segments of 
antennee of M. anglica, male, 
. Genital appendage on first abdominal 
seoment of M. anglica, male, 
250 
x 750 
750° 
750 
750 
750 
