116 



The horn fly, Ilpematoh/d serrata^ hats been noticed as very plentiful, 

 perhaps not .so abundant as during one or two summers after its tirst 

 distribution, but in such numbers as to prove a serious annoyance to 

 animals. 



The fall webworm, HyplKmtria cvnea^ has appeared in very great 

 a])undance and, it seems to me, much earlier in the season than usual. 

 One colony was noticed in the latter part of May with larva^ already 

 nearly grown, and during June numerous broods have been observed, 

 some of which at present, Jiuie 20, appear to have completed their 

 growth and entered the pupa stage. I have noticed the cuckoo feed- 

 ing on the larva?, tearing open the webs in order to get at them. 



The occurrence which has doubtless attracted the most general atten- 

 tion and received the most extended popular notice is that of the peri- 

 odical cicada, the eastern border of the brood passing just east of the 

 city of Columbus. 



The first occurrences noted in this locality were May 20, while 

 reports indicated it two or three days earlier at Cincinnati. There 

 seemed to be a fairly well marked early and later wave in appearance 

 separated by a period of about two weeks, a second very abundant 

 occurrence coming in early June. In an old orchard on the university 

 campus this was particularly marked, as the earh^ ones seemed to be 

 completely destroyed by the attacks of the English sparrow so that 

 at one time, about June 1, no individuals could be seen or heard, while 

 the ground was completely littered with the wings and other fragments 

 of the dismembered cicadas. The later appearing forms, while not so 

 completely destroyed at that point, were, I think, mostly destroyed 

 before they had succeeded in laying eggs, and for this particular spot 

 it would appear as if there woukl be scarcely any to appear in another 

 seventeen 3'ears. To some extent this is true of the wooded tracts 

 near the city, but a few miles out I have noticed that the timl)cr is 

 pretty well marked with wilting leaves or drooping twigs which indi- 

 cate the deposition of eggs. 



A very noticeable feature, especially striking to me since I have 

 never encountered it so conspicuously before, is the very large propor- 

 tion of the small form of the cicada which has been recognized under 

 the name of ats><!ni. I have improved the op})ortunity to secure meas- 

 urements of a large series, but this forms the subject of another paper 

 and need not be further mentioned here. 



An interesting occurrence noted this spring is Gos.si/parla uhni^ not 

 hitherto recorded for Ohio, but found in suflicient numbers to be 

 worthy of mention. As yet it can hardly be counted as of destructive 

 abundance, but, taken with other coccids on the same tree, it must cause 

 some injury. 



A Pulvinaria has been observed as quite al)undant on elms also, but 

 lack of time has prevented any careful study of it. 



