750 EXPERIMENT STATION RECORD. 



Preliminary note on Bracon sp., a parasite of the cotton bollworm, F. C. 

 WiLLCOCKS (Bnl. Soc. Ent. Egypte, 6 (1913), No. 2, pp. 56-67; ahs. in Rev. 

 Appl. Ent., 2 (1914), 8er. A, No. 8, pp. 507, 508).— An undetermined parasite of 

 Earias insulana has been found by lal)oratory experiments to breed equally 

 well on the pink bollworm (GelecMa gossypieUa) . 



The white grubs of sugar cane in Queensland, A. A. Gieault (Bur. Sugar 

 Expt. Stas. Queensland, Div. Ent. Bui. 1 (1914), PP- H)- — ^ popular account 

 prepared for cane growers, and based upon work during a period of three years 

 at the Sugar Experiment Stations in Queensland. A technical report will 

 follow. 



The date stone beetle, F. C. Willcocks (Bui. Soc. Ent. Egypte, 6 (1913), 

 No. 1, pp. 37-39; abs. in Rev. Appl. Ent., 2 (1914), Ser. A, No. 8, p. 506).— The 

 author has found a small scolytid beetle, thought to be Coccotrypcs dactyliperda, 

 in dates from Sharkieh Province. 



"An infested stone is perforted by a small circular hole and a quantity of pale- 

 colored dust, composed of excrement and matter excavated from the stone, may 

 be observed inside the date itself. . . . One date stone was found to contain 

 9 beetles, 6 pupfe, and 24 larvae of different sizes, besides ova. Of 244 stones 

 from the 'Amry ' dates only 3, or 1.2 per cent, harbored the beetle, while of the 

 398 'Agla^\T ' dfite stones examined 47, or 11.8 per cent, were infested." 



On parasitic and other nematodes biologically associated with bark 

 beetles, G. Fuchs (Verhandl. Gesell. Deut. Naturf. u. Aerzte, 85 (1914), II, pt. 

 1, pp. 688-692; abs. in Rev. Appl. Ent., 2 (1914), Ser. A, No. 6, p. 375).— This 

 paper deals with nematodes that are found associated with bark beetles, par- 

 ticularly with Ips typographus and the weevil Hylobius abietis. Some of the 

 nematodes are true parasites. 



Two blossom weevils (Anthonomus pomorum and A. rubi), A. Tullgben 

 (Meddel. Centralanst. Fiirsoksv. Jordbruksomrddet, No. 93 (1914), PP- 12, pi. 1; 

 abs. in Rev. Appl. Ent., 3 (1915), Ser. A, No. 3, pp. 106, 107). — ^A popular treatise 

 on A. pomorum and A. rubi, their biology and remedial measures. 



A hymenopteran parasitizing the oothecae of a blattid, A. Alfiebi (Bui. 

 Soc. Ent. Egypte, 6 (1913), No. 1, pp. 14, 15; abs. in Rev. Appl. Ent., 2 (1914), 

 Ser. A, No. 8, pp. 504^ 505). — ^Two species of Evania, E. laevigata and E. 

 abyssinica, are said to have been reared from Stylopyga orientalis that were 

 kept under observation. 



The North American fever tick: Notes on life history, E. C. Cotton 

 (Tennessee Sta. Bui. 113 (1915), pp. 31-77, figs. 15).— A report of biological 

 studies of the cattle tick conducted at Knoxville, Tenn., earlier reports relating 

 to which have been noted (E. S. R., 20, p. 1054; 26, p. 458). Recent studies of 

 the biology of this tick by other authors, including Newell and Dougherty in 

 Louisiana (E. S. R., 18, p. 987), Hunter and Hooker in Texas (E. S. R., 19, 

 p. 664), Graybill in Alabama (E. S. R., 28, p. 63), and Hooker, Bishopp, and 

 Wood in Texas (E. S. R., 27, p. 865) have been noted. The report is presented 

 under the headings of life history, the engorged adult, preoviposition period, 

 the female reproductive organs, rate of oviposition, fatal temperatures, the egg 

 stage, the incubation period, overwintering eggs, the seed tick, longevity of 

 seed ticks from overwintering eggs, and mortality of seed ticks from extreme 

 cold. 



The following is a summary of the more important results of these investi- 

 gations, which, it should be pointed out, are based upon and apply particularly 

 to conditions in Tennessee, which State lies on the northern border of the 

 tick belt. 



" The parasitic stages of ticks are little affected by changes in air tempera- 

 ture. These require, respectively, 7 to 9 days for seed-tick engorgement, 5 to. 



