348 EXPERIMENT STATION EECORD. 



winter of 1909 and 1910 about 20 per cent of the bugs died normally in the 

 clumps of red sedge grass, where they hibernate. 



" Experiments in Kansas made during the winter of 1909-10 showed that as 

 high as 75 per cent of the hibernating chinch bugs could be killed by burning 

 this grass. The best time to burn is in the fall, when the grass is as dry as 

 possible. It is not uecessiii-y that the flame come in actual contact with the 

 bugs. The effectiveness of the burning is almost entirely dependent upon the 

 cooperation of the farmers in infested localities. Neglect to destroy chinch 

 bugs collected in these grasses will often result in serious injury, if not indeed 

 a complete destruction of wheat, corn, cane, and kaflr. Next to burning, the 

 dust and coal-tar barriers are the most effective remedies, and should be used 

 while the bugs are migrating from wheat to corn. These barriers must be 

 properly made, and demand constant attention to be of any value. Many bugs 

 can be killed while massed on the first rows of corn by applying a torch or 

 spraying with kerosene emulsion or proprietary spraying materials. Plowing 

 under infested crops is not recommended unless the work is done very thor- 

 oughly and followed by a crop not susceptible to chinch-bug attack. Barriers 

 made of piles of green corn are of no value, and are not recommended. The 

 white fungus {Sporotrichum globuliferum) can not be dei>ended upon to ex- 

 terminate the chinch bugs. This fungus is very dependent upon moist weather 

 conditions for its rapid development and diffusion. . . . Attempts at artifi- 

 cial introductions of the fungus in the fields have so frequently resulted iB com- 

 plete failures that this method is not recommended." 



Piesma capitata as an enemy of sugar beets in Silesia, Grosser {Abs. in 

 Prakt. Bl. Pflanzenlxni u. Schutz, 8 {IDIO), No. 12, p. 156; Internat. Inst. Affr. 

 [Rome], Bui. Bur. Agr. Intel, and Plant Diseases, 2 {1911), No. 2, pp. W, 

 450). — The tingitid is reported to be the cause of curly top of sugar beets in 

 Silesia. As a remedy it is recommended that all weeds in the vicinity which 

 attract the pest, especially species of Chenopodiacese, be destroyed. 



Aleyrodidae of economic importance, G. E. Bodkin (Jour. Bd. Agr. Brit. 

 Ouiana, 5 {1911), No. 2, pp. 83-86, pis. 9). — The author describes a species of 

 Aleyrodes which has been observed infesting species of Anona in Georgetown 

 and cassava plants on the East Coast, where it has been the source of con- 

 siderable damage. It is stated that when large numbers of Aleyrodidse appear 

 on a plant a chalcidid parasite frequently attacks them. 



Pernicious scale (Agr. Jour. Union So. Africa, 2 (1911), No. 4, PP- -^88, 

 489). — It is stated that the government is attempting to eradicate the San 

 Jose scale, recently discovered in a Pretoria nursery and from which it is 

 thought to have been spread for several years on infested fruit trees and roses. 



Studies of comparative lepidopterology, C. OBERXHtJR (Etudes de L^,pidop- 

 Urologie Comparee. Rennes, 190.'/, No. 1, pp. 77, t)Is. 6; 1906, No. 2, pp. 43, pis. 

 3; 1909, No. 8, pp. 415, pis. 25; 1910, No. 4, pp. 691, pis. 2//).— Among the sub- 

 jects considered are dimorphism, mutation, sphingid hybrids, notes on the 

 French and Algerian species, etc. Notes on the myrmecophilous lycenid cater- 

 pillars, by H. Viehmeyer (pp. 342-349) and a list of animals associated with 

 ants, by C. Janet (pp. 349-417) are included. 



The work is illustrated by colored plates. 



The willow caterpillar (Clisiocampa azteca), J. R. Inda (Estac. Agr. Cent. 

 [Mexico] Bol. 63, 1911, pp. 16, pis. 4). — An accoimt is given of the life history, 

 habits, and natural enemies of, and remedial measures for, C. azteca, which 

 during March and April completely defoliates willows (Salix bahilonica and 8. 

 pringlei), in Mexico City. 



Mimosa thorn caterpillar (Rhodesia Agr. Jour., 9 (1911), No. 1, pp. 81-84, 

 pis. 3). — The Mimosa thorn caterpillar (Haplopacha punctifascia) is said to 



