146 University of California Publications. | ZOOLOGY 
May be distinguished from Aetideus by the form of the ros- 
trum, relatively shorter inner. ramus of the posterior antennae, 
and by the fusion of the proximal joints of the outer ramus of 
the first foot (fig. 15d). 
1. Gaidius pungens Giesbrecht. 
Gaidius pungens Giesbrecht, 1895, p. 249, pl. 1, figs. 1-4; 1898, 
p- 32. 
Gaidius pungens Wolfenden, 1903, p. 266. 
‘ 
Fig. 15.—Gaidius pungens. Female. (a) Dorsal, X18. (b) Head, lateral, 
x45. (ce) Tube-like processes on inner distal portion of 
second basal of fourth foot 195. (d) First foot «195. 
Ri., inner ramus. 
2 Anterior antennae reaching at least to posterior border of 
thorax. The processes on the inner border of the first basals of 
the fourth feet are heavier and stiffer than in the preceding 
pairs, being almost tube-hke (fig. 15c). 
& Unknown. 
Coloration: Transparent, with little or no pigment. 
Length: Female, 3 to 3.5 mm. 
