658 EXPERIMENT STATION RECORD. [Vol.36 



are Bembidium mutatum, B. trechiforme, Platynus cupreus, Pterostichus lucu- 

 blandus, and Amara (Celia) farcta. Other species recorded as probably pre- 

 dacious at Agassiz are Orus punctatus, Xantholinus hamafus, Hesperobium 

 californicum, Dinaroea angustula, and a red mite. 



Some experiments on the breeding of the mangold fly (Pegomyia hyos- 

 cyami) and the dock fly (P. bicolor), A. E. Cameron (Bui. Ent. Research, 7 

 {1916}, No. 1, pp. 87-92, figs. 2). — The experiments here reported have led the 

 author to the conclusion that " P. hyoscyami reared on belladonna will oviposit 

 and complete its life history on mangolds if belladonna be absent. Why this 

 same species did not oviposit on the leaves of sugar beet was not discovered. 

 P. hyoscyami reared on mangold leaves did not oviposit on those of the very 

 closely allied sugar beet. All that can be inferred from the experiment is that 

 the species when reared on the leaves of the mangold will more readily oviposit 

 on those of the same plant than on sugar beet. 



" P. bicolor reared on dock does not oviposit and complete its life history 

 on the leaves of the mangold or sugar beet. It may also be safely asserted 

 that neither does P. hyoscyami reared on mangold or sugar-beet leaves oviposit 

 on those of the dock. 



" Where weeds and cultivated plants have their leaves similarly blotched 

 and blistered by leaf-mining maggots, one must make a careful examination 

 of the insects before stating that the damage is due to one and the same 

 agent. The author believes that hasty and immature judgment has led to the 

 commonly accepted error that the maggot (P. bicolor) which mines in the 

 leaves of the dock also attacks those of mangolds. That the insect which 

 blisters the leaves of the common weed, goosefoot (Chenopodium album), is 

 identical with the P. hyoscyami wliich causes similar injury to mangold leaves, 

 there is no doubt. In how far there may be a migration, if any, of the insects 

 between the two plants has not been experimentally established." 



An account of the life history of P. hyoscyami by the author has been 

 previously noted (E. S. R., 32, p. 351). 



A new species of Agromyza destructive to beans in the Philippines, J. R. 

 Malloch {Proc. Ent. Soc. Wash., 18 {1916), No. 2, p. 93). — Agromyza de- 

 structor, which is very destructive to beans in the Philippine Islands through 

 working in the stems of young plants, is described as new. 



The scarabeid enemies of sugar cane, C. Moreira {Os Besotiros da Canna de 

 Assucar. Rit) de Jvneiro: Min. Ayr., Indus., e Com., 1916, pp. 25, figs. 22). — A 

 brief account of the more important white grubs injuring sugar cane in Brazil 

 and means for their control, with a note on other sugar cane pests. 



On the value of poison bait for controlling cane grubs, E. Jarvis {Bur. 

 Sugar Expt. Sta-s. Queensland, Div. Ent. Bui. 4 {1916), pp. l-i, figs. 9). — A re- 

 port of laboratory tests of poison bait for the control of the grey-back cane 

 beetle {Lepidiota albohirta), a serious pest of sugar cane. 



A generic synopsis of the coccinellid larvae in the United States National 

 Museum, with a description of the larva of Hyperaspis binotata, A. Boving 

 {Proc. U. S. Nat. Mus., 51 {1917), pp. 621-650, pis. 4).— This paper includes a 

 bibliography of ten pages. 



A bad attack by the mustard beetle on water cress, A. Roebuck {Jour. 

 Bd. Agr. \_London'\, 23 {1916), No. 3, pp. 238-2^1, pi. l).—Phwdon cochlearim 

 has been the source of severe injury to water cress on a Shropshire farm. 



The desert com flea-beetle, V. L. Wildermuth {U. S. Dept. Agr. Bui. 436 

 {1917), pp. 21, pi. 1, figs. 7). — This is a report of studies of the biology and 

 methods of control of Chcetocnema ectypa commenced in the Imperial Valley 

 of California in 1910 and carried on during 1913, 1914, and 1915 at Tempe, Ariz. 



This flea-beetle occurs in injurious numbers in the cultivated areas of the 



