ECONOMIC ZOOLOGY — ENTOMOLOGY. 257 



In hot summer weather, however, they may hatch on the fourth day. The 

 length of life of the 14 hibernated females kept in confinement varied from 22 

 to 69 days, the last dying on June 11. Ninety-six was about the average num- 

 ber of eggs laid by each hibernating female, the maximum being 179 and the 

 minimum 36. 



The usual number of eggs deposited by the second brood is from 72 to 84. 

 There is stated to be a variation in the duration of the young stages par- 

 ticularly in the fourth and fifth instars. The author's records of bugs that 

 hatched on August 24 and 25 showed the life cycle, exclusively of the egg 

 stage, to cover from 57 to 65 days. Three full generations and possibly a 

 partial fourth are all that are produced in the vicinity of Raleigh, N. C. Eggs 

 deposited in the fall too late to hatch or bugs that fail to reach maturity before 

 winter commences, do not live until spring. 



On the leaf-hoppers that injure the sugar beet in Bohemia, H. I'zkl {Ztsclir. 

 Zuch-crindiis. Ifolnncn, 35 (Wll), No. 5, pp. 28.')-292). — The species here con- 

 sidered aie Cicadiila scrnotata, Chlorita flavcscens, C. solani, Euptcryx carpini 

 i = T!/plil(jci/ba pic-i(t), and PhUanus spumarii(s (=Aphrophora spumni-ia). 



Description of a new coccid species, Ceroputo ambig-ua, with notes on its 

 life history and anatomy, D. T. Fullaway (Proc. Davenport Acad. Sci., 12 

 (1910), pp. 223-239, pis. 4)- — It is stated that this scale insect is to be found 

 on the stilt marsh grass or pickle weed {Salicoi-nia amhigua) that grows on the 

 marshy flats of the bay region in the vicinity of Palo Alto, Cal. 



Hsematopius urius as an ag'ent in the transmission of infectious diseases 

 of the pig, X. Bernazky {Ahs. in Cciitbl. Bakt. [etc.], 1. Abt.. Rrf., J,5 (1910), 

 No. 20, p. 61.',; Vet. Rcc., 23 (1910), No. llf,9, pp. 37, 38).— The author observed 

 that upon a farm where hog cholera prevailcxl the hog louse (//. urius) [lassed 

 from the dead animals to the straw and thence to other pigs. Lice were col- 

 lected from infected pigs and placed upon 4 pigs of from 10 to 11* kg. in weight 

 that had been obtained from a region free from swine fever, 19 lice ijeing placed 

 upon each pig. 



All of the 4 pigs became ill in from 12 to 14 days, showing diarrhea and be- 

 coming emaciated. Two of the pigs died after 17 and 19 days, respectively, 

 while the other two remained alive until the thirty-first and thirty-fifth days 

 after the conmiencement of the experiment. The autopsies showed lesions of 

 pure hog cholera or alterations due to a mixed infection of hog cholera and of 

 pasteurellosis. 



Notes on Chrysopa dorsalis, E. Maude Aldebson (Ent. Mo. Mag., 2. ser., 22 

 (1911), No. 2.J0. pp. .'t9-5Ii, pi. 1, fig. 1). — An account of the life history and 

 habits of this insect. 



Gipsy and brown-tail moth, suppression, F. W. Kane (Ann. Rpt. State 

 Forester Mass., 7 (1910), jyp. 65-115. pis. 7, map 1). — The details of eradication 

 work conducted by the State in 1910 are here reported. 



During the year many improvements were made in spraying apparatus and 

 methods, it being found possible for a gang to thoroughly spray as many as 

 23i acres of heavy growth in one day. In experiments conducted newly hatched 

 larvre were caught on tanglefoot and screens at distances varying from 50 to 

 600 feet, and a single caterpillar upon one screen on May 11 which was 1.833 

 feet from the point of liberation. " These experiments demonstrated conclu- 

 sively that small caterpillars of the gipsy moth may be carried by wind. This 

 method of distribution is probably most frequent when the caterpillars are in 

 the first, or possibly in the second stage, at which time they spin large quantities 

 of silk for the purpose of lowering themselves from the trees or foliage. It is 

 probable that these insects are often carried long distances in this way, and 



