160 H. F. JAYNE. 



The left maxillary palpus bears two terminal joints. In the right 

 maxillary and the left labial palpi the terminal joint is bifid. Each 

 femur bears two tibiae furnished with tarsi and claws. The second 

 joint of the left maxillary palpus appears to be composed of two joints 

 closely connate the anterior one much shorter than the other, each 

 bearing a terminal joint of somewhat unequal lengths as shown by 

 fig. 12 a. The terminal joint of the right maxillary palpus is deeply 

 cleft at apex representing two joints connate at their basal halves; 

 fig. 12 b. The terminal joint of the left labial palpus gives oif an- 

 tei'iorly from its base a second joint half as long and as stout as the 

 other and connate with it; fig. 12 c. The antennae are normal. The 

 anterior femora are normal in length and in articulation with their 

 coxae. They gradually widen from base to apex where they are more 

 than twice as wide as a normal femur, llhomboidal in section ; the 

 superior surface about one-third narrower than the inferior. The 

 apices are dilated and deeply notched vertically, making two processes 

 about as long as wide, each containing a normal cotyloid cavity with 

 which the tibiae are articulated in a normal manner. Fig. 12 d, shows 

 the femur and articulations as seen at the end. Of the two tibiae the 

 anterior is somewhat shorter and about two-thirds as stout as the pos- 

 terior which is probably the normal one. The spurs, tarsi and claws 

 of both are similar. The middle femora are normal in length and 

 form but about one-half stouter. The apices each contain one large 

 cotyloid cavity. Into this which is twice as wide as a normal one is 

 inserted a single broad condyle formed by coalescence of the condyles 

 of the two tibia is shown in fig. 12 e. The anterior of these is some- 

 what shorter and about two-thirds as stout as the posterior. Its tarsi 

 are also more slender and a little shorter. The articulation of the 

 tibiae with the left posterior femur is identical with that of the middle 

 femora; fig. 12 e. The anterior of the two tibiae and its tarsus are 

 about five-sixths the length of the posterior and one-half more slender. 

 In the right posterior femur the articulation, with the two tibiae differs 

 from all the others. The femur itself is about equal in thickness to 

 the left but is a trifle more dilated at apex. This is not notched as in 

 the anterior femora but truncate. Each tibia is inserted into a distinct 

 cotyloid cavity separated by a considerable interval; fig. 12 f. The 

 anterior of the two has been unfortunately broken off about one fourth 

 of an inch from the femur. The structure of the under side presents 

 no departure from the normal standard. 



Collected by Mr. Morrison in Washington Territory. 



