60 TJniversity of California Publications. [Zoology 



Genns Euchaeta Pliilippi. 



Euclmeta, Giesbrecht ('92), p. 55, 245; ('98), p. 37. 

 Euchaeta, Esterly (:05), p. 156. 



Euchaeta calif ornica n. sp. 



PI. 9, fig. 11; pi. 10, figs. 26, 34. 



Female : Eminence on forehead low ; last thoracic segment 

 rounded laterally, with a heavy tuft of hairs on each side (PI. 10, 

 fio'. 84). Genital segment symmetrical (PI. 10, fip-. 26), the gen- 

 ital swelling large and with two low flanges guarding the orifice 

 (PL 9, fig. 11). The anterior antennae are not as long as the 

 cephalothorax ; first outer marginal lobe of the maxilla with seven 

 bristles. The outer ramus of the first foot is clearly 2-jointed, 

 and there is a very small bristle in the middle of the concave 

 outer border of the first joint; the distal bristle of this joint 

 reaches half-way to the end of the terminal joint of the ramus. 

 The terminal bristle is long and slender. In the second foot the 

 external spine of the first joint of the outer ramus reaches well 

 beyond the end of the first outer marginal spine of the third joint. 

 The second outer marginal of this joint is very long, reaching to 

 the end of the third outer marginal ; the border of the third joint 

 is deeply concave betAveen the second and third external spines. 



Length : Female, 8 mm. 



Coloration : Rather opaque, red in bristles of maxillipeds and 

 feet. The hairs on the furcal bristles are iridescent. 



Occurrence: One female, Coll. 1030. and on the winter trip 

 to San Clemente. Type in the collection of the University of 

 California. 



The shape of the genital segment will distinguish E. califor- 

 nica from the other members of the genus, except possibly E. 

 flava Giesbrecht. The size of the latter (3.2 mm), and the num- 

 ber of bristles on the proximal outer lobe of the maxilla (five in 

 flava, seven in calif ornica), are distinguishing characters. 



