ECONOMIC ZOOLOGY ENTOMOLOGY. 57 



The egg laying period aud the length of the pupal stage have not been deter- 

 mined. By December 20 most of the larv;^ are iu the ' flaxseed.' " 



On the basis of experiments here recorded it is recommended that sowing be 

 done from October 20 to 80. 



What can be done in destroying' the cotton boll weevil during the winter, 

 AV. D. HuNTEE (U. S. Dept. Agr., Bur. Ent. Circ. 101, pp. -'/).— The author calls 

 attention to the fact that while the most important step iu the control of the 

 cotton boll weevil is the fall destruction of cotton stalks, there is much effective 

 work that can be done while the pest is in hibernation. The raking and burning 

 of trash iu cotton fields, the burning of turn rows, ditches, sorghum and corn 

 tields, etc., and the cleaning of fence corners aud similar situations are particu- 

 larly recommended. 



The rose slugs, F. H. Chittenden (f/. 8. Dept. Agr., Bur. Ent. Circ. 105, 

 PI). 12, figs. 5). — Information is presented on the 3 sawflies which attack roses 

 in the United States. 



For the so-called rose sawfly (Endclomyia rosw) the author uses the name 

 American rose slug, indicating that it is native to America. This species is 

 supposed to have originated in New England, where it fed upon the wild rose. 

 It is now known to occur as far south as Virginia and west to Missouri aud 

 Illinois. Life history notes are presented. The larvie or slugs feed chiefly at 

 night aud always on the upper surface of the leaves, which are skeletonized 

 and not eaten, except when the larvae ai'e nearly fully grown. 



The second species (Cladius pectinicornis), which has been given the name 

 bristly rose slug, is thought to have been introduced from Europe prior to 1833. 

 This species is said to be the principal enemy of the rose in and near the District 

 of Columbia and to occur as far west as Missouri. No natural enemies of this 

 pest appear to have been recognized in this country, but 2 parasites Acrotomus 

 lucidiihin and MesocJwrus cimbicis, prey upon it in Europe. 



The third species (Emphytus ciiictus), which has been giveu the name coiled 

 rose slug, is a comparatively recent importation, having first attracted attention 

 near Boston in 1887. It has since been reported from Maine, New York, Penn- 

 sylvania, and Canada. Tachina rustica has been reared from larvae collected 

 in Pennsylvania, while in Europe an ichneumon fly (Cryptics emphytorum) is 

 parasitic upon it. 



The remedies suggested apply to all three species. These are considered 

 under headings of sprinkling with water, Paris green, arsenate of lead, hellebore, 

 .soaps and other washes, etc. 



Experiments with repellents against the corn root-aphis, 1905 and 1906, 

 S. A. Forbes {Illinois Sta. Bui. 130, pp. 3-28). — The corn root-aphis has become 

 one of the most destructive and dangerous insect pests of the corn plant, due to 

 the cornfield ant which protects, transports and guards the aphis and collects 

 and preserves the eggs. The control of these insects is very important, because 

 the injury to corn is sure to increase the more generally and continuously corn 

 is grown. About the only natural agency that can be depended upon to reduce 

 the numbers of the corn root-aphis is a long-continued soaking of the ground 

 l)y frequent heavy rains. 



Experiments with repellents were initiated in 1905 and continued during 

 in06. These are hei'e reported in detail and summarized as follows : 



" Thirty minutes' soaking of seed corn in kerosene before planting, injured 

 seed but protected plants against root-aphis in preliminary field experiment 

 made in 1905. 



" Summer plat-plantings made in 1905, with seed treated with kerosene, kero- 

 sene emulsion, coal-tar water, or turpentine, showed no injury after a moderate 



