456 EXPERIMENT STATION EECOED. 



On some new species of leaf-hopper (Perkinsiella) on sugar cane, F. MuiB 



{Han-aiian Hitgar Planters' Sta., Ent. Bui. 9, pp. IL figs. 5).— The forms be- 

 loDging to the geuus here considered (Perkinsiella) prefer the sugar cane as 

 a food plant only occasionally being found on other grasses. The author pre- 

 sents a table for the sepai-ation of the 13 species recognized as belonging to 

 the genus. The 8 species here described as new are P. palHdula from Pon- 

 tianak, Borneo; P. ratilei, P. hicoloris, P. variegata, P. paptiensis, and P. lalo- 

 kensis from Laloki River, British New Guinea; and P. amboinensis and P. 

 fuscifrons from the Island of Amboina, all from sugar cane. 



The San Jose scale and some experiments for its control, E. L. Wobsham 

 and W. W. Chase (Ga. Bd. Ent. Bid. SI, 1910, pp. 23, figs. 8).— Spraying ex- 

 periments conducted from 1007 to 1909, in which several proprietary sprays, 

 prepared lime-sulphur solutions, homemade lime sulphur, and powdered lime 

 and sulphur were used, are briefly reported. 



" "Wbile each oil was applied as a spring treatment and as a fall treatuiout, 

 it was found In every case that tbe fall treatment was of superior effectiveness. 

 The earlier the spray can be applied after tbe leaves have fallen, the better 

 will be the net results, all other conditions being equal. . . . 



" The concentrated lime and sulphur solutions, being free of all solid matter, 

 offer no more serious obstacles to easy spraying than the oils. . . . Compared 

 to the soluble oil compounds for efficiency, they yield quite as good results as 

 the best oils, even when the latter are used at a greater strength than that 

 recommended by tbe different manufacturers. . . . Besides its strictly insecti- 

 cidal value, lime and sulphur possesses fungicidal properties to a much greater 

 degree than it is possible to incoriwrate in a soluble oil. There is hardly any 

 danger of injuring trees even when used at much greater strength than those 

 recommended by the manufacturers." 



The Coccidae of Audubon Park, New Orleans, La., T. C. Barber {Jour. 

 Econ. Ent., 3 {1910), Xo. 5, pp. 420--'i25). — The author presents an annotated list 

 of 34 species. 



The Coccidae of Boulder County, Colorado, T. D. A. Cockerell {Jour. Econ. 

 Ent., 3 {1910). -Ao. 5, pp. 425-.i30, pi. 1). — This list includes the various species 

 of scale that have been introduced on plants. 



Parasites of the gipsy and brown-tail moths introduced into Massa- 

 chusetts, W. F. FisKE {Boston, 1910, pp. 56, figs. 15). — In this popular account 

 of the work with parasites the author considers tbe nature of insect parasitism, 

 natural control of the gipsy moth, parasite introduction in theory and practice, 

 the sequence of parasites, the parasites of the gipsy moth in Japan, Europe, 

 and America, progress of the parasites in Massachusetts, parasites of the brown- 

 tail moth, etc. It is shown that a sequence of parasites, which will attack the 

 moth in different stages of its development, and all the comiwnent members of 

 which will work together in harmony, is absolutely necessary before the best 

 results may be expected. 



Summarized accounts are given of some of the more important parasites, 

 namely, Anastatus l)ifasciatus and Schedius kuvan(V which attack the eggs; 

 Ghjptapanteles fulvipes, Blepliaripa scutellata, Compsilura concinnata, Tachma 

 larvarum, Triclwlyga grandis, Zygobothria gilva and CarccUa gnava which 

 destroy the caterpillars; and Theronia sp., Chalcis flaripes, and Monodontomerus 

 wrens which develop in the pupse. A summarized statement of the probable 

 time at which different species will become effective, pen drawings of the para- 

 sites considered, and diagrams illustrating tbe dispersion, numerical increase, 

 and increase in the average abundance of an introduced insect accompany the 

 account. 



