ECONOMIC ZOOLOGY — ENTOMOLOGY. 757 



occurring from Cauada, through the New England States southward into Penn- 

 sylvania, and west to Wisconsin. It is also said to have been recorded from 

 Texas and Vancouver, British Columbia, while the original specimen was de- 

 scribed from North Carolina. In New York State there is only a single brood 

 each season, the new brood of adults appearing during the second week in 

 August and becoming common during the latter part of the month and early 

 September. At Ithaca oviposition takes place from June to August. The 

 larvae, which hatch out in from 14 to 18 days, make their way from the branches 

 to the young and tender foliage near the tips of the twigs, where they feed 

 ravenously and reach maturity in from two to three weeks. Where the larvae 

 are abundant all the foliage may be so completely skeletonized as to turn brown 

 and die, giving the trees a scorched appearance. A close examination about 

 Ithaca failed to detect the presence of larvaj on any trees but the pin cherry. 

 Pupation Is said to take place at or slightly below the surface of the soil. 



Due to scarcity of material, control experiments have not been conducted by 

 the authors, but correspondents have reported good success from the use of 

 arsenate of lead paste at the rate of 4 to 5 lbs. to 100 gal. of water and also 

 from a spray containing 40 per cent of nicotin. 



The tobacco wireworm, C. Bencomo (El Pasador del Tahaco. Port an Prince, 

 Haiti: Author, 1915, pp. IS, pi. 1; ahs. in Rev. Appl. Ent., 3 (1915), Scr. A, No. 9, 

 p. 525). — Agriotes (Elatcr) segetis, known as an enemy of cereals and vege- 

 tables, attacks the roots of the tobacco plant in Cuba, where it is termed the 

 tobacco wireworm. The present paper gives a brief account of its life history 

 and control measures. 



The corn stalk beetle, R. W. Hakned (Mississippi Agr. Col. Ext. Serv. Press 

 Circ., 1915, June 19, folio.) — The author reports complaints from many parts 

 of Mississippi of injury to corn by the corn stalk: or sugar cane beetle (Ligyrus 

 rugiccps), an account of which by Titus (E. S. R., 17, p. 781) has been noted. 

 It is pointed out that while it does some damage every year, it was apparently 

 much worse during the spring of 1915 than during any previous year of 

 which there is record, with the possible exception of 1904, as reported by 

 Herrick (E. S. R., 17, p. 265). Several remedial practices are recommended. 



The effect of cyanid on the locust borer and the locust tree, W. P. Flint 

 (Scie7ice, n. ser., 42 (1915), No. 1090, pp. 726, 727).— The author, from the Illi- 

 nois state entomologist's office, reports experiments carried on in central and 

 northwestern Illinois early in the spring in which from 0.05 to 0.5 oz. of 98 

 per cent potassium cyanid and of cyanid-chlorid carbonate mixture (guaran- 

 tied to contain from 35 to 38 per cent sodium cj^anid) was inti'oduced into 

 50 black locust trees of from 1 to 7 in. in diameter. The cyanid was inserted 

 in the trees in auger holes of 0.25, 0.5, 0.75, and 1 in. in diameter, bored at 

 diffei-ent heights from the ground and different depths into the trunk. 



Of 42 trees located in July, 23 were dead and 19 alive, all but 3 of the latter 

 being infested with living larvae of CyUenc rohime. " In several cases living 

 borers were found directly above and within 6 in. of the auger holes, and in 

 3 cases the borers were within 1 in. of the auger holes. Not only were the 

 borers alive in the living trees, but in all cases where the trees had put forth 

 leaves in the spring of 1915 living borers were present in numbers in the 

 trunks, and could be found around the bases of the trunks of many of the 

 trees that had not shown foliage the past spring. Not a single dead borer 

 was found near the points where the cj-anid had been placed. 



" While over half of the trees treated were dead, this was not entirely due 

 to the effects, of the cyanid, as at least 25 per cent of the untreated trees in 

 both groves had died from the effects of borer injuries. There can be no doubt, 

 however, that the cyanid had a very injurious effect on the trees, as in all the 



