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." 



* Epischiira nevadeiisis Lilljeborg. 



Plate XI, Figs. 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 E. lacustrls, 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. Antennte 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. 



* Episcbiira iievacleusis Lilljeborg. Var. Columbijie Forbes. 



Plate XI, Figs. 4, 10. 

 Forbes '93. 

 This alpine form is not only a little larger but the thorax is more 

 distinctly jointed. The antenna? 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 U. lacustris. The three caudal set as 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. 



