158 EXPERIMENT STATION EECOBD. [Vol. 37 



The California species of Myzus, with the description of a new species, 

 G. O. Shinji {Canad. Ent., 49 {1917), No. 2, pp. ^9-51, fig. i).— Seven species of 

 this important genus are recognized from California, of which one (Myzus 

 godetice) is described as new to science. 



Mealy bug control, R. S. Wogluu (Cat. Citrogr., 2 (1911), Xo. .{, pp. 4< o, 

 fig». 3). — This is a report of an address delivered before the Lemon Men's 

 Club, at Alhambra, Cal., on January 3, 1917. The effect of fumigation on the 

 citrus mealy bug, sprays effective against it, and important natural enemies, 

 the interrelation of ants to mealy-bug Infestation, etc.. are discussed. 



A list of the Coccidss of Porto Rico, T. H. Jones (Jour. Bd. Comrs. Agr. 

 P. R., 1 (1917), No. 1, pp. 1-16). — This is an annotated list of 50 .species of the 

 Coccidse recorded from Porto Rico. A bibliography of 25 titles is included. 



A new scale insect affecting sugar cane in New Guinea. A. Rutherford 

 (Proc. Linn. Sac. N. S. Wales, J,l (1916), pt. 2, pp. 215, 2i6).— Under the name 

 Aulacaspis nwjor the author describes a new coccid occurring on the stems of 

 sugar cane in New Guinea. 



The development of the silk glands in the chief races of silkworms and 

 in their first crosses, from the point of view of the quality and length of the 

 reelable silk from each cocoon, P. Bucci (Staz. Sper. Agr. Ital., 4^ (1915), 

 No. 12, pp. 84I-88S; abs. in Inteniat. Jntt. Agr. [Rome], Internal. Rev. Sci. and 

 Pract. Agr., 7 (1916), No. 2, pp. 261-265). — Experiments repeated during 1914 

 and 1915 led to the conclusion that the weight of the adult worm in the nine 

 races studied varies from G.OOO to 8.000 times that of the silkworm at the time 

 of emergence from the egg. The lengths of the thread and the reelable silk 

 of some of the races and hybrids are given. In each of the races studied the 

 ratio between the average length of the reservoir and the average total length 

 of a cocoon is always greater than 1 : 2.5. There is a correlation between the 

 average weight of an adult .silkworm, the average length of the silk gland, the 

 absolute weight of the reelable silk of a single gland, and the average length of 

 the reelable silk. 



Genetic studies on the silkworm, Y. Tanaka (Jour. Col. Agr. Tohoku Imp. 

 Univ., 7 (1916). No. S, pp. 129-255, pU. 6, figs: 8). — A report of experiments 

 carried on from 1910 to 1915 which relate particularly to the larval characters. 

 A bibliography of lOS titl«'s is inclu(U><l. 



The Lepidoptera of the Isle of Pines, being a list of the species collected 

 on the island by J. L. Graf and G. A. 'Link, sr., in 1910 and 1912-13. W. J. 

 Holland (Ann. Carnegie Mus., 10 (1916), No. 5-4, pp. 4S7-51S, pi. /).— An an- 

 notated list of 109 species. 



Hyponomeuta species and their control in Sweden. A. Tullgren (Meddcl. 

 Centralan.1t. r'dr.vJksv. Jordbruksotnrddet, No. 110 (1915), pp. 23, figs. 16; abs. in 

 Intemnt. Inst. Agr. [Rome], Internal. Rev. Sci. and Pract. Agr., 7 (1916), No. 

 2, pp. 316, 317). — Hyponomeuta cvonymellus is said to be most widely distrib- 

 uted in Sweden, where it has appeared in recent years on Pruntis padus in 

 such numbers as to cause serious injury. //. nialinellus, II. padellus, and H. 

 cognatellus are less common and never very injurious. 



An outbreak of the eight-spotted forester, Alypia octomaculata, in New 

 Haven, Connecticut, Q. S. Lowry (Jour. Rcon. Ent., 10 (1917), No. 1, pp. 4T> 

 48). — The author records an outbreak of this pest on grape at New Haven, 

 Conn., in 191G. 



Notes on the peach-tree borer (Sanninoidea exitiosa), G. G. Becker (Jour. 

 Econ. Ent., 10 (1917), No. 1, pp. 49-59. fig. 7).— These notes relate largely to the 

 pupation, emergence, and habits of the moth in Arkansas. 



