129 



but no young were seen. On the next day the young in all stages were 

 found at the north pond, which lie* in an open prairie region, while but 

 one imago was noted. Ten days later the north pond was again visited 

 and many imagoes secured, although the young were still plentiful. 



The difference in time of development at the two ponds is probably 

 due to the surrounding forest which shelters the one to the southward, as 

 about its margins occur the four southern species of Orthoptera mention e< 1 

 above in the notes on Conocephalus palustris, not one of which hag been 

 found at the north pond. 



The males of attenuatum are, as far as my experience goes, the most active 

 leapers among the winged, Locustidse, jumping a half a dozen or more 

 times without pause when flushed, and in the net leaping so rapidly from 

 side to side as to prevent capture with the lingers. The females are evi- 

 dently handicapped in their leaping powers by the excessive length of the 

 ovipositor, and so more often endeavor to escape by burrowing beneath 

 the dense masses of fallen grass and reed stems which are always found in 

 their accustomed haunts. 



I find that the length of the ovipositor among the different species of 

 Xiphidium is not at all dependent upon the age of the insect. In attenuatum 

 it is almost as long after the third, and fully as long after the fourth moult 

 as it is in the imago; while on August 11th a female of strictum was taken 

 with no vestige of tegmina in which the ovipositor measured IS mm. 

 The eggs of attenuatum, as the length of the ovipositor indicates, are laid 

 between the stems and leaves of tall, rank grasses. 



Only the short winged form of this species has been noted in Indiana, 

 but Prof. Bruner has taken the long winged form in Nebraska, and Mr. 

 Scudder described it from the latter taken in Illinois ; though McNeill 

 makes no mention of the species in his list of Orthoptera from that state. 

 Kedtenbacher, in his Monographie, has copied Scudder's description and 

 has separated the species from all others of those from America to which 

 it is closely allied, placing it next to fasciatum, with which it has little af- 

 finity, by virtue of the wing characters alone. 



VII. Okchelimum, Serville (1831). 



Locustida- of medium size, but with a short and stout body. Vertex, 

 face and eyes much as in Xiphidium. Spines of the presternum well de- 

 veloped, cylindrical and slender. Antenna' slender and tapering, usually 

 of excessive length. Wing covers narrow, the apical half often much 

 less in width than the basal, exceeding the abdomen in all of our species; 



9 



