ACHORUTES. 



145 



eight in number on each side. Saltatory appendage of moderate 

 length. 



Achorutes. Abdominal segments subequal. Antennae short, 

 four-jointed. Eyes eight in number on each side. Saltatory 

 appendage quite short. 



Figure 172 represents a species of this genus very abundant 

 under the bark of trees, etc., in New England. It is of a blackish 

 lead color ; a, end of tibia bearing a tenant hair, with the tarsal 

 joint and large claw; Z>, spring; c, the third joint of the spring, 

 with the little spine at the base ; figure 163, the supposed ovi- 



172. Achorutes. 



173. Lipura fimetaria. 



positor; , the two blades spread apart; 6, 'side view. The 

 mouth-parts in this genus are much as in Tomocerus, the max-' 

 illse ending in a lacinia and palpus. 



The three remaining genera, Lipura, Anurida and Anura, are 

 placed in the "family" Lipuridae, which have no spring. Lub- 

 bock remarks that "this family contains as yet only two* 

 genera, Lipura (Burmeister), in which the mouth is composed 

 of the same parts as those in the preceding genera, and Anura 

 (Gervais), in which the mandibles and maxillae disappear." Our 



*Dr. Labonlbene has recently, and we think with good reason, separated Anura 

 maritima from the genus Anura, under the name of Anurida maritima. 

 13 



