904 EXPERIMENT STATION RECORD. 



beetle, arsenate of lead used at tbe rate of 15 oz. to 80 gal. of water, 

 to which 2 qt. of thick molasses was added, was successfully used. 

 As soon as the beetles ai-e noticed feeding upon the leaves, and before 

 they have had a chance to oviposit, the trees should receive their first 

 spraying. Later, when the leaves have unfolded, they should be sub- 

 jected to a second spraying. If the work is thoroughly done, all the 

 beetles will be killed, but in order to insure success the use of a very 

 strong solution of arsenate of lead is recommended, say 1 lb. to 75 gal, 

 of water. A synopsis of the reports received from different parts of 

 the State relative to injurious insects forms a kind of appendix to the 

 first part of the report. 



Belation of insects io fruiis (pp. 413-452j. — The second part of the 

 report is comprised under this head and discusses, in a moid or less 

 general wa3% the subject of pollination, and is based largely upon the 

 author's own observations, which show in certain cases there is need, at 

 least in some portions of the State, of systematic bee keeping. 



The details of the external anatomy of insects, such as the tongues 

 and hairs of moths, bees, flies, etc., are discussed and figured as tliey 

 appear beneath the microscope. 



Miscellaneous notes (pp. 452-526). — In this part of the report, Bulletin 

 ~So. Ill (E. S. R., 7, p. 515) on Eaupenleim or Dendrolene is reproduced 

 in full, as is also Bulletin 110 (E. S. E., 7, p. 514) on the Hessian fly, 

 and the life history', habits, and appropriate remedies for the following 

 insects are discussed with some detail: The Colorado potato beetle 

 {Doryphora i(>-//»ertY«), the fall webworm {Hi/phantria cunea), the maple 

 pseudococcus {Psendococcus aceris), the hickory bark borer {Scolytns 

 t^,s2>^Hos^^9), saddle back caterpillar (i/'w^^re/Zr; stiinidea). the melon louse 

 {A2)]iis gossypii), American i)rocris (Harrissina amerivana), the cabbage 

 muggot {Phorhia hrassica'}, white grubs {Lacnosterna sp.), the fig eater 

 {AlJorhina nitida), and the Hessian fly {Cecidomyia destructor). In 

 preparing these accounts former bulletins of the station and the work 

 of others have been used. 



Relative to remedies to be used against the potato bug. the author 

 strongly advises the killing off of the early beetles and the destruction 

 of all such weeds as "horse nettle" and "jimson,'' adding that, if this 

 be done, the beetle will be so rare within a few years that injuries from 

 it will be insignificant. 



With reference to the hickory bark borer, he points out that healthy 

 and vigorous trees are rarely injured, but as soon as the trees are 

 weakened from any cause they are attacked with a readiness that 

 varies directly as the numbers of the insects. If the latter are in sufti- 

 cient numbers to attack the entire circumference of the trunk of a tree, 

 it is soon girdled and death follows. 



The simplest remedy to be used against the insect is poisoned white- 

 wash applied early in the season, and, if possible, kept intact through- 

 out the year. This will discourage the beetles when looking for i^laces 

 to oviposit, and will undoubtedly kill all that may attempt to gnaw 



