August 16, 1907] 



SCIENCE 



219 



one of these pink katydids, a male of the 

 species Amhlycorypha, ohlongifoUa (De Geer), 

 identified by Jas. A. G. Eehn, was sent to 

 the Museum of the University of Michigan 

 some months ago, by Mr. A. S. Austin. He 

 captured the insect on Grosse Isle, in the De- 

 troit River, some twelve or fifteen miles below 

 Detroit, on August 12, 1906. This specimen 

 is of duller colors than the ones figured by 

 Seudder,^ but is still a decided pink. The 

 brown spots on the tegmina are fainter, twelve 

 or thirteen in number, and less scattered than 

 in Scudder's specimens, and are roughly ar- 

 ranged in two rows on the lower two thirds of 

 the wings. The yellow flecks mentioned by 

 Scudder are wanting. 



The stridulating area, like that of Scud- 

 der's specimen, is brown except a small 

 trapeziform area at the angle of the wing, 

 which is pink. The eyes are brownish red, 

 margined with yellow. The antennse are yel- 

 low, inclined to brown in the distal half. The 

 sides of the thorax, all of the coxae, and the 

 proximal fourth of the hind femora are tinged 

 with green. 



Besides this specimen there is also in the 

 University Museum a female of the same 

 species, without data, which has also duller 

 colors than the female of Scudder's plate. 

 This dullness can hardly be attributed to a 

 fading in the preserved specimen, for the male 

 was received alive, and up to the present time 

 has preserved its colors perfectly. 



Polsom^ has been led to remark that these 

 pink specimens are found in late summer, 

 as if to suggest that the change may be at 

 least in part due to seasonal influence. If 

 this statement is meant to apply to adults 

 only, the earlier dates, August 9 for one of 

 Scudder's specimens and August 12 for 

 Austin's, can hardly be considered late 

 records. If the replacement occurs also in 

 nymphs, of which I find no record in the 

 accessible literature, then the earliest records 



' Scudder, S. H., ' Pink Grasshoppers,' Ento- 

 mological Neics, Vol. XII., No. 5, May, 1901, pp. 

 129-131, and PI. VI. 



' Folsom, J. W., ' Entomology with Reference to 

 its Biological and Economic Aspects,' p. 215. 



are comparatively late, and Folsom's sugges- 

 tion is of some force. It would be gratifying 

 to learn the dates of other unrecorded speci- 

 mens. A. FR.-iNKLiN Shull 

 Universitt Museum, 

 University of Michigan 



gymnosporangium maceopus 



During the last few years the cedar rust has 

 increased in abundance and severity in Ne- 

 braska and adjacent states. The disease has 

 been so severe that it has threatened the life 

 of the cedars in many places where they have 

 been employed as wind-breaks around orchards 

 or where they were adjacent to apple trees 

 that were susceptible to infection. 



Spraying experiments have shown that the 

 disease may be at least partially controlled on 

 the apple, but those who have cedars — and 

 there are many in this section who value 

 them as much as they do their apple trees — 

 have been clamoring for assistance in saving 

 them from the inroads of this fungus. 



As a result of this demand careful obser- 

 vations have been made on the life history 

 of this rust and spraying experiments are in 

 progress. The work was started with the sup- 

 position that the spores of the cluster-cups 

 on the apple leaves and fruit produced the 

 cedar apples which matured in the autumn of 

 the same season, but observations and experi- 

 ments have not confirmed this assumption. 



Observations made during the summer of 

 1906 showed that the first cluster-cups ma- 

 tured on the apple about the first of July in 

 the vicinity of Lincoln. At this date only a 

 very few cluster-cups were open and these 

 were mostly on the fruit where two or more 

 apples were in contact. A few days later 

 young cedar apples as large as radish seeds 

 were found to be present on the cedars. At 

 Broken Bow, Custer County, the first mature 

 cluster-cups were not observed until the eighth 

 of July, and at that time cedar apples were 

 found in abundance varying in size from one 

 twelfth to one fourth inch in diameter. 



Careful watch has been kept of the cedars 

 during the present season. The first indica- 

 tion of the presence of the young cedar apples 



