160 University of California Publications. [ ZooLocy 
Occurrence: July 21, 1903, one female; May 26, 1904, one 
female; July 5, 1904, four females; May 28, 1904, two females, 
one with egg cases, one without. 
i Senses * 
Fig. 24.—Huchaeta spinosa. Female. (a) Head, lateral, X15. (b) Abdo- 
men, lateral, X48. Gen. seg., genital segment. (c) Outer 
ramus of second foot X45. (d) Basals, inner ramus, proximal 
joints of outer ramus of fourth foot X45. 
3. Euchaeta media Giesbrecht. 
Euchaeta media Giesbrecht, 1888, p. 337; 1892, pp. 246, 263, pl. 
16, figs. 13, 36; pl. 37, figs. 39, 40; 1898, p. 39. 
2 Elevation on front of head low (fig. 25d); genital 
segment asymmetrical with processes in the region of the orifice 
and a flap on the right side of the segment behind the orifice 
(figs. 25c, d) ; furea (fig. 25g) as in E. acuta. Anterior antennae 
extend a little beyond the posterior border of the genital segment. 
