60 EXPERIMENT STATION RECORD. [Vol. 38 



crop, when this operation can be completed in time to apply the water before the 

 last of September, has been found to be the most effective control measure. 

 This treatment is effective in that it comes before the worms have spun their 

 cocoons, and a reflow lasting not more than a week is undoubtedly of sufficient 

 duration to kill all naked girdler larvae. 



" If the berries can not be removed from the vines in time to permit fall 

 flooding before the last of September, or if the water supply is insufficient, the 

 next best method of control is to hold the winter flowage over the vines until 

 July 20, thereby losing one crop of berries, but gaining a clean bog and the 

 possibility of having a crop twice the normal in quantity the following year. 

 In the event that the foregoing remedies can not be employed, recourse may be 

 had to sanding and better cultural methods." 



A list of 12 references to the literature is appended. 



A little-known cutworm, Euxoa excellens, A. Gibson (Canad. Ent., ^9 

 (1917), No. 12, pp. J^Ol-JfOS). — A contribution to the knowledge of this cutworm, 

 which in the Province of British Columbia has been abundant enough in certain 

 years to effect important damage to vegetables of several kinds. 



Apple and thorn skeletonizer (Hemerophila pariana), E. P. Felt {Jour. 

 Econ. Ent., 10 (1917), No. 5, p. 502). — This yponomeutid is said to have become 

 well established at Irvington, N. Y., ranging east to White Plains, and south to 

 Scarsdale, and is reported as being present for a mile or two on the west bank 

 of the Hudson. The caterpillar skeletonizes the upper surface of the leaf, 

 usually drawing in a variable strip on each side about 0.5 in. wide and spin- 

 ning a light web near the center of the leaf. Its work may be distinguished 

 from that of the fall webworm by the absence of the enveloping web inclosing 

 one or more leaves. The caterpillars are said to be easily destroyed by 

 arsenicals as they feed upon the upper surface of the leaf. 



Notes on the life history of Marmara elotella, a lepidopterous sap feeder 

 in apple twig-s, S. C. Vinal (Jour. Econ. Ent., 10 (1917), No. 5, pp. 488-^96, 

 fig. 1). — The life history studies here reported relate to a tineid (M. elotella) 

 which forms serpentine mines in the bark of apple twigs and is prevalent at 

 various points throughout Massachusetts. Its tunnels do not penetrate deep 

 enough to injure the cambium and therefore it is of little economic importance. 

 Similar mines thought to be caused by different species were observed by the 

 author on poplar, ash, and pine. 



An infestation of potatoes by a midge, Edith M. Patch (Jour. Econ. Ent., 

 10 (1917), No. 5, pp. 472, 473, pi. 1). — The mining of potato tubers at Roxle. 

 Me., in 1913, by a chironomid of the genus Camptocladius is recorded. 



An improved method of rearing tabanid larvae, W. Maechand (Jour. Econ. 

 Ent., 10 (1917), No. 5, pp. 469-472). — The author has found that the larvse of 

 a number of species of Tabanidse, and probably of most of them, do not need 

 earth or sand for their development. They can be kept very conveniently in 

 test tubes laid out with a rolled-up sheet of filter paper somewhat less than the 

 length of the test tube and filled with water to about 0.5 to 1 in. high, which is 

 sufficient to keep the filter paper moist for a number of days. Meat proved to 

 be an excellent substitute for earthworms as food. 



The house fly, L. O. Howaed and R. H. Hutchison (U. S. Dept. Agr., Farm- 

 ers' Bui. 851 (1917), pp. 23, figs. 15). — This publication, which replaces Farmers' 

 Bulletin 679, previously noted (E. S. R., 33, p. 455), gives a summary of in- 

 formation on the house fly, particularly as based upon recent investigations of 

 the Bureau of Entomology (E. S. R., 33, p. 455; 34, p. 654). 



Fly traps for camps, hospital precincts, and trench areas, A. Balfoub 

 (Jour. Roy. Army Med. Corps, 27 (1916), No. 1, pp. 61-72, figs. 9).— This dis- 



