lO-'O] ECONOMIC ZOOLOGY — ENTOMOLOGY. 457 



hi;?li-.vielcling ureas. Only a high srnde of calcium arsenate containing not less 

 than 42 per cent of arsenic pentoxicl and not more than 0.75 per cent water 

 goluhle arsenic should be used. It should never be used as a liquid spray, but 

 should be dusted on the cotton. Jt should be applied at night or in early morn- 

 ing when the plants are moist with dew. 



" Hand picking of weevils and .squares will be more prolitable than poisoning 

 until the damage is 10 per cent, which will be about the last of June or the 

 middle of Jul.v. Poison every week so that all new leaves and squares will be 

 eovercil, and poison after each heavy rain that washes off the poison. Be 

 economical with poison, for cost of material is the greatest item of expense. 

 T'se power machines if possible, for they use less material and cover the plants 

 more thoroughly. Poisoning alone without other control measures is not 

 sullicient." 



Alfalfa weevil and control niothotls, C. WAKicr.AND {Unir. liUiho Kxt. Giro. 

 S3 (19.^0), pp. It). — This is a popular summary of information. 



TIk' banana weevil (Cosmopolites sordida Chevr. ) , H. Tkyon {Queens- 

 Unul Af/r. Jour., 13 {1020), No. //, pp. 165-168, fig. i).— This paper includes de- 

 scriptions of the several stages of the weevil, an account of its habits, and 

 the detection of its occurrence. Remedies suggested, by A. H. Benson, are 

 appended. 



Beekeeping for the Oregon farmer, A. L. Lovett {Oreg. Agr. Col. Ext. Bui. 

 282 (1919), pp. 24, flffs. 12). — This is a practical summary of information. 



Notes on the bionomics, embryology, and anatomy of certain Hymen- 

 optera Parasitica, esi)ecially of 3Iicrogaster connexus (Nees), J. B. Gat- 

 KNiiv {.four. Linn. Sac. [London], Zool, 33 {1919), No. 22J(, pp. 387--',16, pis. 3, 

 figs. 15). — The data here presented have been sumurarized by the author as 

 follows: 



'• Notes are given on the bionomics of certain Chalcididie, Braconidie, 

 Proctotrypida?, and Cynipidse, especially of M. connexus, Mesochorus pallidus, 

 and Aphidius sp. M. connexus (Nees) is a Braconid parasite on the larvae of 

 the moth Porthcsia similis. M. pallidus (Brisch.) is a hyperparasite on the 

 larvic of Microgaster which live inside the larvje of the moth P. similis. Notes 

 and descriptions of part of the life-history of Apan teles glomeratus, allied to 

 M. ronne.riis, are also given." 



Microgaster lays from 16 to 50 eggs inside the body of snrall larvjE of P. 

 finiilis. In rare cases very few eggs are laid, while in other examples 60 

 larvae were bred from one parasitized moth caterpillar. The average num- 

 ber is about 30. The anatomy of the larvae is described. 



"The hyperparasite has been shown to oviposit while the larval Micro- 

 gaster is from one-third to one-half full size. Certain facts with regard to 

 the habits of the hyperparasite (Mesochorus) are given. 



"Notes are given on parasitism and hyperparasitism among Aphidae. Fig- 

 ures of four insects bred from aphids, and belonging to different families, are 

 given. The presence of a peculiar embryonic membrane in Aphidius sp., para- 

 sitic on Aphis pomi, is described, and its use pointed out. The subject of 

 entomophagus parasitism in Hymenoptera is fully discussed from the point of 

 view of Microgasteridae and Aphididae." 



Notes on certain entozoa of rats and mice, together with a catalogue of 

 the internal parasites recorded as occurring in rodents in Australia, T. H. 

 Johnston {Proc. Roy. Sac. Queensland, SO {1918), pp. 53-78. fig. 1).—A bibliog- 

 raphy of 57 references to the literature is Included in this paper. 



