60 EXPERIMENT STATION RECOBD. 



fields. In order to prevent serious injury to cotton, the mortality of the weevil 

 should be above 90 per cent. It has averaged over 57 per cent for 4 years and 

 has reached almost 100 per cent several times. While climatic influences occa- 

 sionally bring the control above 90 per cent, they can not be regulated or in 

 any way directly utilized. . . . 



" The parasites and predators which attack the boll weevil are native insects, 

 already present in a given territory before the weevil arrives. . . . The weeds 

 surrounding the cotton fields contain many weevils which are harboring multi- 

 tudes of available parasites. These parasites may be induced to attack the 

 boll weevil by the timely elimination of their native hosts. This leads to the 

 recommendation that planters cut the weeds adjoining the cotton fields, along 

 the roadsides, turn rows, and fences about the time of the maturing of the 

 crop. It also leads to the recommendation that a field adjoining the cotton be 

 used as a pasture or hay field, and that this field be mowed early in the fall. 

 The usual haying will also bring about the same result — namely, the elimina- 

 tion of other plants harboring weevils which attract the parasites needed in 

 the cotton patch. . . . 



" The cultural methods of controlling the cotton boll weevil are the most 

 favorable methods of cotton culture from the parasitic standpoint. . . . The 

 fact that many more parasites are reared in hanging squares than in fallen 

 squares makes it desirable in humid regions to have many of the hanging 

 squares in a field in order to serve as a nursery of parasites for the weevils in 

 and fallen squares. . , . 



"Any step which will diminish the number of weevils and not diminish the 

 number of parasites in a field will of course increase the percentage of parasites 

 present. The most important step of this kind is the collection of infested 

 squares and placing them in cages with a screen through which the weevils can 

 not escape but the parasites can. Ant colonies may be introduced into the 

 fields in boxes of fresh manure." 



A weevil (.ffisiotes leucunis) destructive to pine trees (Pinus halepensis), 

 W. W. Froggatt (A(;r. Claz. N. S. Wulefi, 23 {J912), No. 1, pp. 55, 56, pi. 1).— 

 It is stated that this weevil is destroying every pine tree in an avenue in the 

 neighborhood of Strathfield. 



Historical notes on the causes of bee diseases, E. F. Phillips and G. F. 

 White (U. S. Dcpt. Agr., Bur. Ent. Bui. 9S, pp. 96). — This bulletin reviews 

 papers relating to the etiology of bee diseases, in chronological order. The 

 purpose of the bulletin is to assist bee keepers in obtaining a proper under- 

 standing of the work done by the A-arious investigators. 



Descriptions of two new genera and six new species of parasitic Hymen- 

 optera, A. P.. Gaiian (I'roc. Ent. 8oc. Wash., l.'t (1912), No. 1, pp. 2-S).— The 

 new species here describefl include AUorhogas gaUicoIa n. g. and n. S])., reared 

 from eynipid twig galls on Quercus jnnifoUa from which the moth SytKinthedon 

 scitula was reared and on which it is thought to be parasitic; Synaldis incisa 

 n. sp., taken from cages in which the Hessian fly was being reared and on 

 which it is possibly parasitic; Ditrophiotus ftavicoxiis n. sp., taken from a room 

 in which quantities of insect-infested meal and other ground feed was stored ; 

 Agromyzaplutgus detrimentosus n. g. and n. sp., reared from the puparia of 

 an agromyzid fly, probably Leucopis nigriconm ; and Hoplogryon kansasensis 

 n. sp., taken from a cage in which experiments with the Hessian fly were being 

 carried on. 



The cotton leaf blister mite in Barbados (Ayr. News [Barbados], 11 

 {1912), Nos. 258, p. 90; 259, p. 106).— It is stated that Eriophyes gassy pit, flrst 

 discovered in Barbados on February 27, 1912, infests an area which include* 

 a strip some 2 or 3 miles wide along the westward coast for a distance of 18 



