I8OPODS OF NOKTH AMERICA. 639 



116. Genus CUBARIS Brandt. 



First pair of antennae very small, inconspicuous, composed of three 

 articles. Second pair of antennae short, generally not longer than 

 one-third the length of the body; flagellum composed of two articles. 



Eyes composite, small or moderately large. Clypeus very short, with 

 the anterior margin entire, lobate at the sides. Epistome flat, form- 

 ing a continuously straight frontal marginal line. The vertical mar- 

 ginal line reaches the frontal line. 



First thoracic segment with the epimera posteriorly cleft, often 

 also the second; rarely entire. Terminal abdominal segment tetrag- 

 onal, wider at the base than at the apex, more or less contracted in 

 the middle. 



Outer branch of all the pleopoda furnished with trachese. Uropoda 

 short, not extending beyond the terminal abdominal segment. Basal 

 article or peduncle large, wide, entire, tetragonal, obliquely produced; 

 outer branch very small, rather slender, inserted at the middle of the 

 inner lateral margin of the basal article; inner branch small, rather 

 slender or rather compressed." 



ANALYTICAL KEY & TO THE SPECIES OF THE GENUS CUBARIS. 



a. Body tuberculate. 



b. Second thoracic segment without a distinct coxopodite. 



c. Coxopodite of the first thoracic segment hardly perceptible as a very small 

 process below the leg. Prosepistoma of head with a shield-like convexity. 

 Apex of telson half as wide as basis. Endopodite of the uropoda extends 



one-half the length of the telson Cubans tenuipunctata (Dollfus) 



cf . Coxopodite of the first thoracic segment hardly perceptible, only a feeble 

 ridge. Prosepistoma of head nearly flat. Apex of telson one-third nar- 

 rower than basis. Endopodite of the uropoda extends two-thirds the 



length of the telson Cubans depressa ( Dollfus) 



V . Second thoracic segment with a distinct coxopodite (underside), 

 c. Coxopodite of the first thoracic segment distant from the edge, crested, and 



ended by a tooth-like diverging process Cubans viticola (Dollfus) 



</. Coxopodite of the first thoracic segment not distant from the edge and not 



crested. 

 d. Coxopodite of the first thoracic segment distinct along the entire length of 



the edge (underside). 



e. Coxopodite of the first segment divergent on the half hind part. Cox- 

 opodite of the second segment forming a tooth-like diverging process. 



Cubans silvarum (Dollfus) 

 e / . Coxopodite of the first segment not divergent. Coxopodite of the second 



segment large, square-shaped Cubans perlata (Dollfus) 



d'. Coxopodite of the first thoracic segment not distinct along the entire length 



of the edge. 



e. Coxopodite of the first segment small, dentiform, and very unequally 

 cleft Cubans murina Brandt 



See Budde-Lund for characters of genus, Crust. Isop. Terrestria, 1885, pp. 15-16. 

 6 Cubans calif oniica (Stuxberg) is not included in this key, as the description is not 

 sufficient in detail to obtain characters for synoptics! arrangement. 



