STATE HORTICULTURAL SOCIETY. 229 



plenty of young bark lice crawling about on the ground, grass and weeds. Even where 

 the apple trees were most remote, I have seen two and three in one field of my one-inch 

 lens. I also found them crawling up the Bide of the barn, at some distance east of apple 

 trees ; also found the bark lice on the fence, piles of wood and lumber wagon, sled, &c, 

 in the orchard. 



May 28th. — Cold rain ; the bark lice are crawling very slowly. 



May :inth. — I found some bark lice crawling very slowly. Beneath one scale, I took 

 twenty-live young bark lice. At 4 P. M. I put a number of these into a vial, to see how 

 long they would travel in this confinement. 



June 1st. — Rain and cold ; no bark lice crawling on the trees. Those bottled day be- 

 fore yesterday are crawling around with usual activity. 



June '2d. — The bottled bark lice are crawling slowly; see none on the trees or 

 ground. 



June 3d. — A very few are crawling on the trees. Those in the bottle are no longer in 

 motion, and appear to be dead. 



June 7th. — See several young bark lice crawling, and about the same number of young 

 acarians — the parasitic enemy of the apple bark louse. The number of located bark lice 

 does not exceed the number of the old scale. Afternoon — The acarian parasites are 

 much more numerous than I have ever observed before. I often see several under one 

 field of my pocket lens, as I explore the limbs of the apple trees. To be certain of the 

 determination, I brought some into my office and instituted a microscopic examination. 

 They arc all over white ; thus proving that the head and fore-legs of those described 

 from autumn specimens of last year, were really stained with the juices of the despoiled 

 eggs, as I then suggested as possible. 



June 9th. — The closest search fails to secure any young, crawling bark lice. The 

 hatching season is over. Most of the young have anchored themselves (asl to Hie trunk 

 and limbs, close to the parent stem. This failure to emigrate outward to the extremity 

 of the limbs, a-- much as usual, may be accounted for by the unusual prevalence of cold, 

 damp weather, at the time of their migration. 



July 4th. — Durini: the past few days I have made close search, with a view of deter- 

 mining the condition of the young bark lice, and find the great majority of them blasted 

 — killed by something which I am convinced was the acarian parasites, observed so 

 abundant amonir them in the early and middle part of June. 



July oth.— The few living yottng apple bark lice are nearly half grown. Upon turn- 

 ing up the scale in a manner that bends it, I readily see it separating into two flakes; 

 the inner stratum is thin and brown, and readily cleaves from the outer or main part of 

 the scale. Upon carefully trying a number of specimens, I find that they all present 

 this same phenomena ; this inner scale looks very much like the skin newly moulted, and 

 not yet cemented to the outer scale, and is another argument in favor of the theory de- 

 rived from my former observations, that the scale of the apple bark louse i- constructed 

 by the Insect, out of its mould skins, cemented by its secretions, etc. (2YafM. Amer. 

 Ent. Soc, January, 1868, pa</e 861.) 



August 6th. — Th< eire; laying season has < imenced, but very few scab- have ma- 

 tured. Saw one Acartu malm traveling on the bark, and one of the rapid running acari- 

 ans noted by Mr. Walsh, and which lie supposed to be the parent of the apple bark louse 

 parasite. This rapid runner Stopped B long time at a hole in the bark, which I had just 

 made with a needle. It descended head foremost Into this hob, and remained some 



