Ewhth Report of the State Entomologist, 



217 



Enclosed I mail yon two insects; the little green one is easy to find, 

 but the other i> more difficult to detect. It is a worm in a sheath, 

 which when fastened to the leaf, stands out at an a ngle of b"> , and 

 looks, to the naked eye, something like a lettuce seed. When detached 

 from the leaf, it comes (partly) out from the sheath and crawls like a 

 worm. If touched it quickly draws back into its sheath. There are 

 millions of the first named insects, and but few of the last in my 

 orchard. Please give me their names and the probability of the latter 

 to increase and do damage. 



The green insects, of which there were many creeping over the open- 

 ing 1'iids, are the common apple-tree aphis. Aphis mali Fabr. They 

 are still quite small, but have 

 already undergone one moiling 

 since hatching from the eggs, as 

 numbers of their cast shriveled 

 skins are fastened to the buds. 

 Wherever abundant, the injury 

 that this insect causes in extract- 

 ing the sap from the buds is so 

 great that its increase should be 

 promptly arrested by spraying 



Fig 52. 



Apple-tree aphis, Aphis mali; winged and 

 [wingless forms. 



with a strong soap solution, to 



bacco water, or the kerosene emulsion — the last, the most reliable. 

 The other insect, inclosed in a " sheath," is the apple-tree case-bearer, 



•Coleophora maliuorella Riley. It is apparently rare in the State of 



New York, as it is 

 but the second time 

 that it has come to 

 my notice, the first 

 having been noticed 

 in the Country Gen- 

 tleman for July Gth, 

 1882 (vol. xlvii, p. 

 533), as occurring in 

 South Byron, Gen- 

 esee county, N. Y. 

 Its eggs were laid last 

 July — the' caterpil- 



- The apple-tree cast- bearer, Coleophora mali vorella.— lai'S hatching there- 

 a, a. a, the cases containing the larvae, shown in natural size ; £___, • Q 01 ,toTnliov 

 />. larva, enlarged: c, pupa, enlarged; d. the moth enlarged. 110 " 1 in oepiemuei, 



(FromK11ey ^ and at once inclosing 



themselves in a brown, parchment-like cylindrical case, leaving an 

 opening for the head and anterior segments to protrude, so as to admit of 

 28 



