ECOlSrOMIC ZOOLOGY ENTOMOLOGY. 555 



nebiilosus) was reportocl as causing serious injury in tlie eastern part of the 

 State. The woolly aphis was not so common in the nurseries of the State as 

 in previous years. Aphis mali became very numerous on apple stock in nur- 

 series as well as on apples in orchards. The apple leaf hopper continued to be 

 abundant in nurseries seuerally. The lesser apple leaf folder (/IcZens ininuta) 

 caused serious injury to apple stock in two large nurseries in the southwestern 

 part of the State. Chionaspis piitifoUcc is said to have been fairly common 

 among evergreens in one of the large nurseries in southwestern Iowa but did 

 no appreciable damage. The cherry slug {Eriocampoides Umaclna) stripped 

 many cherry trees of their leaves in the vicinity of Ames. Early in the season, 

 the box elder aphis (Chaitophorus ncgundinis) was very common on the box 

 elder trees in various parts of the State. The buffalo tree hopper continued to 

 be abundant on apple trees in orchards, causing serious losses to young apple 

 trees every year. 



An Outline of an Investigation into the Use of Hydrocyanic Acid and Carbon 

 Disulphid Gases as Fumigauts was pi'esented by W. E. Hinds (pp. 214-218). 



Entomological Notes for Missouri for the Season of 1908 were presented by 

 Marj- E. Murtfeldt (pp. 218-220). Aphis mali on apple and quince, A. prunifoUi 

 on the plum, and Myzus persicus on the peach are said to have appeared in such 

 numbers that the blossoms were dwarfed and tarnished and the young leaves 

 so distorted and crumpled that the trees had the appearance of being blighted. 



Report on insects, C. O. Houghton {Trans. Peninsula Hort. 8oc. [Del.], 

 22 (1909), pp. 3S-Jf3). — ^Attention is called to a few of the more important in- 

 sect pests of 1908 in Delaware. These include the tarnished plant-bug (Lygus 

 pratcnsis), Diabrotica fittata, D. 12-punctata, Aphis gossypii, A. forhesi, An- 

 goumois grain-moth (Sitotroga ccrealella), San Jose scale, and plum curculio. 

 Remedies for each are briefly considered. 



[Monthly reports of the Argentina agricultural pest commission] (Bol. 

 Mens. Com. Defensa Agr. [Buenos Aires], 1908, Nos. 9, pp. 8, maps 2; 10, pp. 9, 

 maps 2; 11, pp. 10, pi. 1, maps 2; 12, pp. 10, pi. 1, map 1; 13, pp. 10, maps 2; 

 Iff, pp. 9, pi. 1, maps Jfj 15, pp. 13, maps kl 16, pp. IS, maps //; /~, pp. 15, maps 

 2; 1909, Nos. 18, pp. 20, maps 3; 19, pp. 12, maps 3). — In these monthly reports 

 the status of the ravages of various pests and the work of combating them is 

 presented. Particular attention is given to the injury done by locusts. Maps, 

 which show the movement of swarms, localities invaded, etc., accompany the 

 reports. Other pests reported are mosquitoes, ants. West Indian peach scale, 

 army worm, tobacco worm, rabbits, etc. 



Brown-tail moth, house fly, and mosquito, T. B. Symons (Mar gland ^ta. 

 Bui. 13.'f, pp. 201-223, figs. 11). — This is a popular account of Euproctis chri/sor- 

 rhwa, Musca domestica, and Culex pipiens. 



Some statistical observations on termites, mainly based on the work of 

 the late Mr. G. D. Haviland, E. Warren (Biometrika, G {1909), No. h, pp. 

 329-347, fig. 1). — "Although the young appear to hatch all alike and in certain 

 species {Termes natalensis, for example) all are the offspring of one queen and 

 king, yet the various asexual and sexual castes of a nest exhibit marked 

 differences in their variabilities. The differences in the variability can not 

 therefore be regarded as due to inheritance, but must be supposed to arise 

 mainly through post-embryonic environmental infiuences. The sexual caste is 

 much loss variable than the asexual castes." 



An orthopterological reconnoissance of the southwestern United States. 

 I, Arizona. II, New Mexico and western Texas, J. A. (J. Rehn and M. 

 Hebard (jProc. Acad. Nat. iicL Philu., 60 {1908), pt. 3, pp. 365--'i02, figs. 9; 61 



10377— No. 6—09 



