REPORT OF THE STATE ENTOMOLOGIST 



499 



A Maple-Tree Scale Insect. (Gardening, for March 15, 1894, ii, 

 p. 20G — 18 cm.) 



Silver maples in Maryland, brought three years ago from an eastern 

 nursery and now seriously affected with a scale insect (no examples sent), are 

 probably infested with the " maple-tree scale insect," Pulvinaria innumer- 

 abilis (Rathvon). The characters and habits of this species are given and 

 the means of destroying it with kerosene emulsion at its hatching time. 

 If it be some other species it could be destroyed by the same means, but 

 would require examination with a magnifier to discover the vulnerable egg- 

 hatching period. Mr. Wm. Falconer's experience with scale insects quoted. 



The Rose Slug. (Gardening, for April 1, 1894, ii, p. 230 — 27 cm.) 



A remedy is asked for destruction of roses by the rose slug, for the past 

 two years in Tracy City, Tenn. The most simple remedy is dusting with hel- 

 lebore or spraying with one ounce of the powder in one gallon of water, 

 preferably after dark, when the slugs are feeding on the upper surface of the 

 leaves. Mr. Howard's " spraying with cold water remedy" is given. Brief 

 account of the common rose slug, Monostegia rosea, and of two other spe- 

 cies (sawflies) recently introduced from Europe, viz., the bristly rose worm, 

 Cladius pectinicornis Four. , and the curled rose worm, Emphytus ductus 

 (Linn . ) 



White Worms at the Eoots of House-plants. (Gardening, for 

 April 15, 1894, ii, p. 257, c. 2 — 7 cm.) 



Strong mustard water applied will bring the worms to the surface of the 

 ground where ^they may be readily killed . Tobacco water or pyrethrum 

 water will probably kill the worms. One [ounce of corrosive sublimate to 

 thirty gallons of water has been recommended, but it is too poisonous a sub- 

 stance for general use. 



Apple Maggot — Trypeta Pomonella. (Country Gentleman, for 



May 3, 1894, lix, p. 349, c. 1, 2 — 40 cm.) 



The small larvae which destroy apples by tunneling them in every direction 

 as described in an inquiry of name and remedy, from New Salem, N. Y., 

 are the "apple maggot" of Trypeta pomonella Walsh. Figures of the in- 

 sect in its different stages are given, as also its habits, etc. It is known to 

 infest seventy varieties of apples. It can not be reached by spraying with 

 insecticides. The best remedies are, destroying the infested fruit, and 

 searching for and destroying the pupae in bins and barrels. Where a val- 

 uable study and extended account of the insect may be found. 



The Foe of Shade-Trees. (Albany Evening Journal, for May 7, 

 1894.) 



Notice of the elm-tree bark-borer [Saperda tridentata] infesting shade- 

 trees in Albany. How the borer works, and the best remedies to be employed 

 for repelling egg-deposit or destroying the grubs. 



