April 1S91.] 



PSTCHE. 



63 



mon one in the early spring and while 

 green males are very rare at this season 

 green females are common ; later the 

 green form predominates and the brown 

 form is the one of exceptional occui'rence, 

 but the males are less uncommon than the 

 females. In the northern part of the 

 state there is but one brood that hatched 

 from eggs in the late summer and ma- 

 tured the following spring, so that the 

 form infuscata is the common one 

 always. In Moline I have captured 

 full grown specimens ;is early as the 

 twenty- second of April and as late as 

 the seventh of July. 



51. EncoptolopJi7is sordidus Bur- 

 meister. Common throughout the State 

 but more abundant northward. While 

 the males of many species and the females 

 of some species occasionally fly with a 

 crackling noise, the males of this species 

 seem not to be able to fly at all without 

 making this noise. This is a fortunate 

 circumstance for the collector since the 

 dark color and the short and exceedingly 

 quick flight of the male make it very 

 difficult to follow. I captured speci- 

 mens from August twenty-first to the 

 thirtieth of October. 



*52. Cammula pcllucida Scudd. 

 This species undoubtedly occurs in the 

 northern part of the state although I 

 have never seen a specimen taken within 

 its borders. I have specimens from 

 Wisconsin and Mr. Thomas includes 

 the species in his List of the Orthoptera 

 of Illinois on the authority of Mr. Scud- 

 der. 



53. Hipplscus tuberculatus Pal. de 

 Beauv. This a rather common species 



in the early spring. Larvae and pupae 

 pass the winter under the shelter of 

 leaves and grass and mature very early 

 in the spring, about the first of May. It 

 shows a decided preference for certain 

 localities, being found year after year in 

 the same field or on the same hillside. 

 From these favorite haunts it never 

 seems to wander far although appar- 

 ently well able to fly across the state. 

 There are two places each a few rods 

 square on Rock Island where 1 have 

 never failed to find them summer or 

 winter and these are the only places 

 where they are to be found on the Isl- 

 and, which is three-fourths of a mile 

 wide and three miles long. 



54. Hipplscus rugosus Scudd. This 

 species is also rather common at Moline 

 and probably throughout the state. The 

 red and the yellow winged forms are 

 found in about equal numbers in Rock 

 Island Co. except on the "Sand Hill" 

 where thev are quite common and all 

 apparently yellow-winged. I have taken 

 them on Rock Island as early as the 20th 

 of August. A specimen in the Illinois 

 state laboratory of natural .history bears 

 the date of Aug. 14, taken at Pekin. 



^ s; . Hippisczis phoenicopterus Burm . 

 This is the species formerly known as 

 H. discoideus Serv. while the species 

 that used to bear the name phocuicop- 

 ierus is now known to be H. tubercu- 

 latus Pal. de Beauv. I have taken a 

 a single species at Moline. It is prob- 

 ably a rare species throughout the state. 

 Taken the 5th of September. 



*56. Xauthippus neglectus Thos. 

 Thomas says he captured it in the 



