SUBFAMILY II. -TRIDACTYLIX.E. 657 



a height of five feet and a distance twice as great. By close search 

 it will probably be found to occur along the damp sand bars of the 

 lakes and streams of northern Indiana. 



The known range of T. apicaJix is a very wide 

 one, extending from southern Xe\v England, 

 Ithaca, N. Y. and near Toronto, Ontario west to 

 Minnesota and south and southwest, according 

 to Scndder (11)02), to Georgia, Louisiana, Texas, 

 Southern California, Mexico, Ecuador and South 

 America. The only Florida record which can be 

 found is that of the type locality of Say I loc. cit. ) , 

 who states that it is ''numerous on St. John's 

 Fig. 216. Tri- River in East Florida, and on the Missouri as far 



dactyl us apicalis ., T . ... ,, 



Say. as Council Bluff." 



Saussure (1874, 352) was the first to suggest 

 that the T. tcnui mills Scndder (1862, 425) "is probably only a 

 northern variety of T. apicalis in which the organs of flight have 

 not arrived at their full development." Later he evidently con- 

 sidered tenninaUs as only a synonym as he does not mention it in 

 his revision (1897a). 



In Ontario Walker (1904, 144) first found two specimens of 

 up'H-alis near the Humber River and later in numbers along a 

 small stream near York Mills. This is its most northern record. 

 Lugger (1898, 259) mentions a single specimen as having been 

 taken near Ft. Snelling, Minn. 



Thomas (1865, 442) says that in Illinois his T. iUinoiensis, a 

 synonym of apicalis, is abundant throughout the State, ''living in 

 the soft sandy banks of branches close to the water. Here their 

 little holes may often be seen in great numbers, from which in- 

 dividuals of all ages will emerge if the earth is forcibly pressed. 

 While walking along the banks of the river I have seen them by 

 hundreds leap on to the water along which they float for an in- 

 stant and then spring back on the bank. They have a singular 

 enemy in the bug, (lalyulus ocuhitus Fab., which, being of a mud 

 color and lying flat close to the ground, moves slowly along and, 

 when close to its victim, with a sudden upward and forward leap 

 it grasps the unsuspecting cricket with its fore legs and plunges 

 its beak into it." 



On Staten Island, N. Y. Davis (1891) found apiralix "not un- 

 common at Watchouge in damp places. Their small size and 

 marvelous agility made them most entertaining insects to capture. 

 The power of leaping is so great that they seem to disappear quite 



