84 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. | . 
It is to be regretted that no opportunity has occurred to observe 
this species since the above was written. It is very probable that 
mature examples would modify as well as extend the above. It is a 
bit amusing to find De Guerne concerned over the discrepancy of our 
locating ‘‘baie de Mulberry’’ in a mountain region—a difficulty which 
would disappear should he grasp the English usage of ‘‘creek’’ which 
he has translated ‘‘baie.’’ 
* Epischura nevadensis Lilljeborg. 
PLATE XI, Fias. 1, 6, 8. 
De Guerne and Richard ’89. 
Of moderate size. Cephalothorax five-jointed; last two confluent; 
last segment not devaricate, rounded. Abdomen three jointed in the 
female. Caudal stylets shorter than the preceding segment; slightly 
ciliated internally; caudal seta equal and similar; externally a short 
Spine. Abdomen of male five jointed, curved to the right, similar to 
that of #. lacustris, second and third segments nearly equal in length, 
the first shorter; the second segment produced on the right side into a 
very large wing-like process, denticulate along its hinder border and 
emarginate at the tip; third segment with a shorter, smooth and 
broadly rounded process. The fifth segment with a process on both 
sides. Antenne not reaching the base of the stylets. Antepenult 
joint of male right antenna not appendaged. Fifth feet of female uni- 
ramose, three-jointed, more robust than usual. Apical joint with six 
teeth, of which four are longer. Fifth feet of male uni-ramose, dissim- 
ilar. Right foot apparently two-jointed, the basal joint thick with a 
lamellate and denticulate process at the end, second joint a thick claw. 
First joint of the left foot a very large hook; third joint incised inter- 
nally, the shallow excavation ciliated, and armed apically with two 
spines. Length of female 2.0 mm. 
Found by A. G. Eisen in the Sierra Nevada region, Lake Tahoe and 
Echo lake. 
* Epischura nevadensis Lilljeborg. Var. Columbize Forbes. 
PLATE XI, Fias. 4, 10. 
Forbes ’93. . 
This‘alpine form is not only a little larger but the thorax is more 
distinctly jointed. The antenne of the female reach to the posterior 
end of the penultimate segment of the abdomen. The first segment of 
the abdomen is as long as the two following together, and the stylets 
are aS long as the preceding segment. The abdomen is not curved as 
in EF. lacustris. The three caudal sete are all similar and of equal 
width. There is a stout conical spine at the outer distal angle and a 
soft seta at the inner angle of each stylet. 
