first ill the interior of the orchard, but on the side nearest the wood. 

 (3) They were allowed to continue under the impression that they 

 would probably "run their course "in a season or two and then disap- 

 pear. (4) Several sorts of birds had been noticed to specially frequent 

 the orchard during the period of the ravages, especially the common 

 cedar birds, the bluebird, chipping sparrow, and others. I noticed 

 during our stay in the orchard the following birds which appeared to 

 be engaged in searching among the withered leaves for the remaining 

 worms : The cedar bird, bluebird, chipi)iug sparrow, song sparrow, 

 summer warblers, robin, cat-bird, crested tly-catcher, kingbird, and a 

 few others passing through, but not apparently engaged in seeking 

 food. 



Mr. McCreary informed me that during the earlier part of the spring 

 when the worms were abundant the birds were more numerous. 



Altogether the case seems similar in many respects to the report 

 made by Dr. S. A. Forbes in Bulletin No. 6, of Illinois State Laboratory 

 of Natural History. 



There remains another interesting point to be considered, of which I 

 have seen no account, in reference to the Canker-worm, namely, some 

 indications of parasitism among the worms this year. Ui)oii going into 

 the orchard Mr. McCreary expressed surprise at not finding more worms, 

 stating that only a few days previous they were fairly plentiful, though 

 much less abundant than a fortnight earlier. This suggestion, together 

 with the sickly appearance of two or three specimens noticed, led me to 

 suspect the possible influence of parasitism. Further search revealed 

 the presence of dead worms, though not in any considerable numbers, 

 of the evident appearance of parasitized specimens. Whether this had 

 been extensive appears doubtful, though the obvious indications of it 

 are interesting. I regret that I had not information in sufficient sea- 

 son to more satisfactorily study the case in detail. It should be stated 

 that Mr. McCreary undertook on a small scale the experiment of spray- 

 ing a few trees with London purple, but owing to the almost incessantly 

 rainy weather ]irevailing at the time it was practically of no conse- 

 quence. 



June 10, 1890. 



MONOSTEGIA IGNOTA Norton. 



By Frederick \V. Mally. 



Since the appearance of my article in Insect Life, Vol. II, No. 5, 

 pp. 137-140, on the life history of Monostegia ignota, additional points 

 of interest in its development have been ascertained. This, together 

 with a desire to consider Mr. W. H. Harrington's article in Insect 

 Life, Vol. II, Nos. 7 and 8, pp. 227-230, induces me to collect my notes 

 in the form of a short article. 



