ORTHOPTEEA OF INDIANA. 391 



reticulate in the female. Posterior femora rather stout, the apex, 

 when appressed, just reaching the tip of ovipositor; armed beneath 

 on the apical half with three or four small spines. Cerci of male 

 stout, tapexing to a point, with the internal tooth, rather broad and 

 flat at base. Ovipositor very similar to that of 0. gladiator Bruner, 

 being very long and stout, nearly straight above, and with the under 

 side of apical third sloping rapidly to the acute apex. 



Color: With the exception of the ovipositor, which is a light red- 

 dish brown, and the usual stripe on occiput and disk of pronotum, 

 the whole body is a pale, transparent brownish green, the green 

 showing plainly only on the lower half of the side of the pronotum 

 and on the meso- and meta-pleura. 



Measurements: Length of body, male, 18 mm., female, 20.5 mm.; 

 of tegmina, male, 21 mm., female, 25-28 mm.; of pronotum, male 

 and female, 4.75 mm.; of hind femora, male, 16 mm., female; 19 

 mm.; of ovipositor, 10.5 mm. 



As shown by the synonymy, this is the 0. Iruneri of my former 

 paper, a comparison of type specimens of volantum, kindly loaned me 

 by Professor McNeill, having proved the two to be identical. The 

 Indiana specimens, however, do not show the character to which Mc- 

 iSTeill calls especial attention, namely, "the distinct angle formed by 

 the anal area with the lateral field in the female tegmina." 



In Indiana volantum has been taken in Vigo, Fnlton, Marshall and 

 Starke counties. It is found most abundantly during August and 

 September on the leaves and stems of a tall, broad-leaved knot-weed, 

 Polygonum ampliibium L., which groAvs luxuriantly in the shallow 

 waters about the margins of the larger ponds and lakes. Several 

 other "green grasshoppers," notably among which are Xiphidium 

 attenuatum Scudd. and Orchelimum nigripes Scudd., frequent this 

 plant in large numbers. Keeping company with them an occasional 

 specimen of 0. hruneri is seen, but, being an active leaper, it often 

 escapes amidst the dense foliage of the knot-weed before its capture 

 can be effected. 



Its less robust body, longer armed posterior femora and long 

 tegmina will readily distinguish this species from 0. gladiator, the 

 only other one which, to my knowledge, has an ovipositor shaped 

 like that of volantum. 



Outside of Indiana, volantum has been taken only near Cleveland, 

 Henry County, Illinois, where McNeill found it in small numbers 

 on the semi-aquatic plant, Sagittaria variabilis Engelm, one of the 

 arrow-heads. "Their song," says McISTeiU, 'Tias a new note in it. It 

 may be represented as follows: zip-zip hr-ze-e-e, Tcr-ze-e-e, the last part 



