102 



Wade (0.). The Sycamore Lace-bug {Corythuca ciliata. Say). — Agric. 

 ExpL Sta., Stillwater, Oklahoma, Bull. no. 116, July 1917, 16 pp., 

 7 figs. [Keceived 3rd January 1918.] 



The Tingid bug, Corythuca ciliata, is widely distributed througbout 

 tbe United States, being found wherever its host-plant, Platanus 

 occidentalis (western sycamore or buttonwood tree), thrives. It has 

 not, as yet, been found on other host-plants, though it attacks two 

 allied trees, P. wrighti in Arizona and New Mexico and P. racemosa in 

 California, but has never been found on P. orientalis (eastern plane 

 tree). 



Injury to the foliage is caused by the adults, which live and breed 

 exclusively on the downy under-surface of the leaf. The insect 

 hibernates in the adult stage under the loose, rough bark of the trunk, 

 and occasionally in cracks and crevices of neighbouring fences, being 

 able to withstand a temperature of 10° below zero. As soon as the 

 trees are well in leaf it ascends to the foliage and begins feeding, 

 oviposition taking place in about 10 days. The eggs which are laid 

 along, and firmly attached to, the projecting larger veins on the under- 

 surface of the leaves, hatch in from 14 to 21 days, the insect, after 

 4 moults, reaching maturity in 33 to 46 days and females of this first 

 generation beginning to oviposit in 8 days. 



None of the insects that prey on this lace-bug can be regarded as 

 efficient natural controls, hence measures must be taken against the 

 adult by means of a contact spray, the eggs being invulnerable owing 

 to the secretion covering them. The best results have been obtained 

 with a fish-oil soap solution used according to the formula, 1 lb. 

 fish-oil soap to 6 U.S. gals, water (preferably soft). This must be 

 applied under a pressure of at least 150 pounds, by means of a large 

 disc nozzle, owing to the difficulty of reaching the insects on the under- 

 sides of the leaves. A second application should be made a fortnight 

 later against the young that have hatched out in the meantime. 



Experiments with nicotine sulphate, concentrated lime-sulphur and 

 kerosene emulsion, gave unsatisfactory results, the last of these causing 

 severe injury to the foliage. 



Knight (H. H.). New Species of Lopidea (Miridae, Hemip.). — Entom. 

 News, Philadelphia, xxviii, no. 10, December 1917, pp. 455-461, 



5 figs. 



The new species of Lopidea here recorded from the eastern United 

 States include: L. heidemanni, found breeding on elm (Ulmus), the 

 nymphs feeding and maturing on the tender terminal growth of young 

 trees, and on yarrow {Achillea millefolimn), indicating that this species 

 has a wide range of food-plants. It was also taken in considerable 

 numbers on Solidago rugosa, in company with L. media. L. salicis was 

 found only on black willow {Salix nigra) ; L. reuteri, found breeding 

 on witch-hazel (Hamamelis virginiana) ; and L. staphyleae, on the 

 American bladder nut, Staphylea trifolia, where the nymphs feed on 

 the tender fohage during July, the first adults maturing on 18th July 

 and many subsequently migrating to hickory trees in the vicinity. 



