Annual report of the Maine Agricultural Experiment Station . omingin contact with the skin. The hairs of the caterpillar are brittleand easily become detached, and when they come in contact withthe skin, produce a most intense irritation. From this causemany persons have suffered so severely as to require the aid ofa physician. The invasion of houses by these insects is a com-mon occurrence, and not unfrequently they make their way intothe sleeping apartments. 40 MAINE AGRICULTURAL EXPERIMENT STATION. I9OO. T. JZ - — - • © crc *f x - - = = .5^3 :; - - _ S -. : £ - ;; g jj — J — 0 - r^~ x - - ~
Annual report of the Maine Agricultural Experiment Station . omingin contact with the skin. The hairs of the caterpillar are brittleand easily become detached, and when they come in contact withthe skin, produce a most intense irritation. From this causemany persons have suffered so severely as to require the aid ofa physician. The invasion of houses by these insects is a com-mon occurrence, and not unfrequently they make their way intothe sleeping apartments. 40 MAINE AGRICULTURAL EXPERIMENT STATION. I9OO. T. JZ - — - • © crc *f x - - = = .5^3 :; - - _ S -. : £ - ;; g jj — J — 0 - r^~ x - - ~ ~ — --: ^ — ^ IE - — 1525 - - -^ 5 s ii c =c = = = < < O =: = «=< - ~ - -z —t_ _ ,£ 5 J § ? S? -: = ~ ^ < o »«2 e s s g = - - - r- -: - r i H =- H i - _ NOTES ON INSECTS. 41 r •?- a _ — — — <» 3 .^ <! 5 e:5 ~ a a a £ a ft -= o K — 00* a £ ~ c~£ = w * ~l~,l~ o o *3 r- D X g a a <o a a a 35 s *5. ho 5-J: L a c ? ?- i^ ^ — ^ C r e -e g 5 a, t> ^ ca a. f: £ o aa o £ « «* Z—~ m UHgg HpjH < aHUH «« - a 2 a a- 5 - 7, - < m 5£2 3 H H -- 42 MAINE AGRICULTURAL EXPERIMENT STATION. I9OO. The caterpillars are quite gregarious up to the later stages oftheir growth, when they disperse to some extent; but when theyoccur only in moderate numbers, they retain their gregarioushabits to a greater degree than when they are very abundant,since in this case the supply of food is soon exhausted and theyare forced to migrate. When these caterpillars molt they gatherin masses on the branches and cover themselves with a scantymass of silk. When preparing to change to the pupal stageseveral of the caterpillars spin up in a common cocoon withinthe leaves at the tip of the branches. When numerous, theyfrequently pupate in masses under fences and clapboards, or onthe trunks and larger branches of the trees.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
