776 EXPERIMENT STATION RECORD. 



numbers changed in 1898 to 14,144 stocks and 33,012 square meters; in 1894 to 3,800 

 stocks and 26,142 square meters; and in 1895 to 2,028 stocks and 41,350 square meters. 



Combating peronospora and phylloxera, A. Gawalowski (Ztschr. Ndhr. Unter- 

 such. n. Hyg., 11 {1897), No. 16, pp. 271, 272). 



The green scale of coffee, T. D. A. Cockerell {Gard. and Forest, 10 (1S97), No. 

 497, p. 347). — Lecanium viridi, the coffee scale of Ceylon, is recorded as having been 

 found on coffee at Sao Paulo, Brazil, by Dr. von Ihering. 



Biological notes on the pine worm, Panolis piniperda, H. Gauckleu (Illus. 

 Wchnschr. Ent . 2 {1897), No. 14, pp. 213-215, figs. 3).— The feeding habits, etc., are 

 described. In 1895 the larva? appeared in great numbers in Hesse and did great 

 damage to the pines. Near Lampertheim nearly all the 53-year old pines on about 

 21 hectares arc now dead. In another area of 60 hectares near the same place most 

 of the trees, which are almost 70 years old, are either dry or show but few green 

 needles. The following parasites have been found affecting this insect: Ichneumon 

 molitorius, I. trilineatus, I. bilunulatus, 1. raptorius, I. pallifrons, I. athiops, I. comi- 

 tator, I. fabricator, I. metaxanthus, I. nigritarius, I. pinitorum, I. piniperdce, Cryptus 

 arrogans, C.filicornis, C. intermedins. C. leucostomus, C. longipes, C. seiicornis, O. pini- 

 perda;, Phygadenon nigritarius, J', commutatus, Ophion ramidulus, 0. luteus, O. merida- 

 riiis, Anomalon unicolor, A. xanthopus, A. gliscens, A. biguttatum, Pimpla cxaminator, 

 P. instigator, Hcteropelma calcator, and Eurylobus tristis. 



Directions for collecting and preserving scale insects (Coccidee), T. D. A. 

 Cockerell ( U. S. Nat. Mus. Bui. 39, pt. L, pp. 9). — The various places and countries 

 where coccidological lists have been made are enumerated and also the countries that 

 still offer fresh lields for the collector. The whole of the East Indian Archipelago, 

 China, Siain, the Malay Peninsula, and Burmah have yet to be explored for coccida? ; 

 also the whole of tropical Africa, the islands of the Indian Ocean, and Madagascar. 

 It is shown that it is important to note the food plant from which scales are collected 

 and brief directions for the recognition, collection, and treatment in the held and in 

 the cabinet are given. 



Destruction of the "pyrale" by washing with nitric acid, L. Degrully (Prog. 

 Agr. et Til., 28 (1S97), No. 51, pp. 697-699). — The use of nitric acid against the 

 "pyrale" {Cenophtira pilleriana) is described as effective and economical and is com- 

 pared with a wash of sulphate of iron. It is diluted with 6 volumes of water. Thus 

 diluted it is used at the rate of 25 liters of acid to 1,000 plants or 28 liters to 800 

 plants. At these rates the cost is about 42.37 cts. for the first and 53.77 for the sec- 

 ond. Besides forming a good insecticide, the acid, on account of the nitrogen con- 

 tained, is further commended as a manure. During winter the ground about the base 

 of the vines may be sprayed with the acid, diluted to 1 to 6, as a remedy for the 

 phylloxera. 



Recent observations on the employment of nitric acid against the "pyrale," 

 L. Degrully (Prog. Agr. et Fit., 28 (1897), No. 52, pp. 729, 730). It is noted that 

 the penetrating qualities of nitric acid used according to the. directions given in a 

 preceding note are not as great as might be desired, and further, that it has not yet 

 been determined whether the acid injures the plants. 



A bee parasite, H. Theen (illus. Wchnschr. Ent., 2 (1897), No. 16, pp. 2i.'-247, 

 figs. S). The history, life history, etc., of Melo'c proscarabwus is discussed. 



A new parasite of the Harlequin cabbage bug, L. O. Howard {Canad. Ent., 31 

 (1898), No. 1, pp. 17,18). — Encrt/his johnsoni, n. sp., which is closely related to E. 

 mitratus of Europe, is described as obtained from eggs of Murgantia histrionica in 

 Maryland. 



On parasites of insects, K. Sajo (Illus. Wchnschr. Ent., 2 (1897), No. 5, pp. 70-76). — 

 A general paper noting among other things that the hosts of but few of the recog- 

 nized parasitic species are known. 



