342 W. D. FuNKHotrsER 



encircling the base of the first tarsal segment (Plate xxxvi, 19). Such 

 developments are common on the tibiae of all three pairs of legs but are 

 best shown on the posterior pair. The nymphs often show markings and 

 ground colors on the tibiae which do not appear on the adult insect. Such 

 colors are lost in the last molt, and, while of no importance in the general 

 study of the body segments of the adult, have been found of value in 

 recognizing the immature forms. 



The tarsus is trimerous and comparatively uniform thruout the family. 

 Of the three segments the middle one is usually the shortest (Plate xxxvi, 

 20-22) ; the first and the last vary with the leg, the first being the longest 

 in the hind leg and the last being the longest in the first two pairs of legs. 

 Each segment is somewhat club-shaped, narrower at its proximal and 

 swollen at its distal end. At the distal ends the segments are not evenly 

 truncate but are much extended on the underside and bilobed above 

 (Plate XXXVI, 23-25). In some species this bilobed condition is much 

 exaggerated, as in Heheticoides acutus (Fowler, 1894-97, tab. iv, fig. 17 c). 



Each tarsus bears a strong claiv, distinctly articulated with the last 

 segment (Plate xxxvi, 26). Each claw is heavy at its base and becomes 

 gradually acuminate to a fine, sharp point. No pulvillus is present, but 

 most forms show a broad, irregular membrane below each half of the claw. 

 The claw is attached to the last tarsal segment by a strong tendon, which is 

 slightly chitinized at its junction with the lower base of the claw and is 

 conspicuous as a heavy cord. 



The comparative length of the tarsal segments varies considerably, 

 and this feature may be used as a specific character but it is of doubtful 

 value. Usually the segments increase in length from in front backward, 

 the hind tarsi being the longest. In most cases the first and second pairs 

 of legs show this diflference only slightly, while the hind tarsi are easily 

 seen to be much longer than the others. A notable exception to this 

 occurs in the subfamily Hoplophorinae, in which the hind tarsi are very 

 much shorter than the anterior or the intermediate ones (Plate xxxvi, 

 27-29). This is the character on which the forms of this subfamily are 

 separated and it is apparently reliable. The relative smallness of the 

 posterior tarsi in these forms is made more conspicuous because of the 

 fact that the posterior tibiae are much swollen at their distal ends, making 

 the comparison between the tibiae and the tarsal segments all the more 

 noticeable. It is interesting to observe that when any tarsal variation 



