662 EXPEEIMENT STATION EECOED. 



and some daj'S should elapse after tlie application of the disulphid before plow- 

 ing. Further, the soil must be neither too damp nor too dry. As the disulphid 

 vapor sinks in the soil it must not be injected to a depth of over 6 in.'' 



The destruction of the cockchafer in the forest nursery, Decoppet ( Schioeiz. 

 Ztschr. Forstic, 63 (.1912), A'o. 4, pp. 122-129, pis. 2, fig. J).— This is a more 

 detailed account of the investigations noted above, which have been under way 

 since 1904. 



The white grub of sug'ar cane in the island of Mauritius, A. Vuillet 

 ISucr. Indig. et Colon., 80 {1912), 'So. 11, pp. 253-255). — This is a resume of 

 the present knowledge of the scarabseid Phytalus smithi and the means of com- 

 bating it. 



The control of the boll weevil, W. D. Huntee (U. S. Dept. Agr., Farmers' 

 Bui. 500, pp. IJf). — ^The matter contained in this publication is extracted largely 

 from Bulletin 114 of the Bureau of Entomology, previously noted (E. S. R., 27, 

 p. 562). It contains a brief outline of the methods which have been tested under 

 various conditions and sums up the present available knowledge concerning the 

 subject of control. 



The honeybee, a guide to apiculture in Canada, C. G. Hewitt {Canada 

 Dept. Agr., Div. Ent. Bui. 2, 1912, pp. J,5, pis. 2, figs, i.)).— This bulletin fur- 

 nishes information for the practical beekeeper. 



A revision of the Ichneumonidae based on the collection in the British 

 Museum, with descriptions of new genera and species, C. Mobley {London, 

 1912, pt. 1, pp. XI+88, pi. 1). — The present work, whith deals with the tribes 

 Ophionides and Metopiides, is said to be the commencement of a revision of the 

 family Ichneumonidse. Five genera and many species are described as new to 

 science. 



The ichneumon flies of America belonging to the tribe Ophionini, C. W.. 

 HooKEB (Trans. Amer. Ent. Soc, 38 (1912), No. 1-2, pp. 176+176a-176c, 

 pis. S). — This revision of the Ophionini is based upon extensive museum and 

 private collections, all but 4 of the types existing in America having been ex- 

 amined. Most of the species attack lepidopterous larvce, including the army 

 worm, cotton worm, zebra caterpillar, the large Cecropia larva?, etc. Oiihion 

 hifoveolatus, however, apparently confines itself to the larvae of Lachnostema. 

 Synonymic lists are given of the genera and species. A number of species are 

 described as new to science. 



The clover mite (Bryobia pratensis), F. M. Webstee ( U. 8. Dept. Agr., 

 Bur. Ent. Circ. 158, pp. 5, figs. 3). — This is a sumraaiized account of the clover 

 or brown mite. This pest attacks the leaves of clover, gras.ses, and fruit and 

 other trees, feeding upon and often destroying them. In addition, during winter 

 and spring it frequently swarms in dwellings, often crawling about in myriads 

 over windows, funaiture, pictures, curtains, etc. As a whole, throughout its 

 known area of distribution, it is probably of moi-e importance to the fruit 

 grower than to the farmer. While east of the semiarid region it is found 

 largely on clover and blue grass, it is at present largely an orchard pest west of 

 about longitude 100°. " With the possible exception of Georgia, the pest seems 

 to occur genei'ally over the whole counti'y, except perhaps in the Gulf States and 

 the Dakotas, though just why it should not be found even there can not now 

 be explained." 



Catei7)illars of Tineola hisellicUa, one of the common clothes moths, have been 

 observed to feed upon the eggs of this mite. A minute black lady beetle (Seym- 

 nus punctum) and lace-^inged flies are also recorded as predaceous enemies. 



Frequent reference is made to the investigations conducted by the Colorado 

 Station, previously noted (E. S. R., 23, p. 264). 



