36 



fields in August were bred out and proved to be mostly Hippodamia 

 quinqmsigmita, Kirby, H. convergens, Guer., H. lecontei, Muls., and 

 Coccinella trifasciata, L., but neither in this stage nor as adults do they 

 seem to be able to penetrate to all parts of the clover head so as to 

 destroy every Aphid, of which as many as 300 may be present on a 

 single head. 



The most abundant Syrphid flies have been reared and await 

 determination. More num-erous than these was a Hymenopterous 

 parasite {Aphelinus hpisligni, How.), the parasitised Apliids, however, 

 appearing more often in the lower leaf-petiole tracts sheathing the 

 stem than in the head, pointing to an early attack of the parasites 

 before the clover heads form. The nymphs of an Anthocorid bug, 

 Triphleps tristicolor, WTiite, are quite as numerous in some fields and 

 more rapidly and persistently penetrate all parts of the clover bloom 

 and stem than all other Aphid enemies combined. 



Preliminary tests with orchard sprayers driven through the fields 

 have shown that a majority of the Aphids may be destroyed with 

 nicotine sulphate and soap at the usual strengths. Adults of 

 Hippodamia convergens confined in small capsules of sprayed leaves, 

 however, die from its effects. Sodium arsenite sprayed in lucerne 

 and clover fields killed 99 per cent, of the grasshoppers, and the 

 addition of nicotine for Apliids did not increase the scorching effects. 



The part played by Haplothrips statices, Hal. {Phloeothrips niger, 

 Osb.) (red or black thxips) in damaging clover and lucerne seed is not 

 yet understood. 



The most common mite on red clover crowns is Rhizoglyphus 

 rhizophagus, Banl^s. Red clover roots received for examination 

 proved to be infested with R. rhizophagus, a new mite, Hologamasus 

 inarmatus, Ew., and Sciara trifolii, Pett., of which four broods were 

 bred in the laboratory between October and February. 



In spraying with nicotine and soap for bean thrips {Heliothrips 

 fasciatus, Perg.) at the usual strength and with an orchard power 

 sprayer, it was found that a large part of the infestation had not been 

 reached by the spray. This was found to be due to a concm'rent 

 attack of Tetranychus telarius, L. (red spider), the leaves being so 

 webbed together as to protect large numbers of thrips from being 

 wetted. 



O'Gara (P. J.). Notes on a new Mite attacking Valley Cottonwood. 



— Jl. Econ. Entom., Concord, N.H., xi, no. 5, October 1918, 

 p. 430, 1 plate. 



The mite here dealt with is a new species of Eriophyes infesting 

 Populus wislizeni in Texas. The type of injury caused by it is also 

 new, and results in some of the leaf laminae becoming very much 

 dwarfed and cut resembling a dense compound inflorescence. 



Becker (G. G.). Lopidea media, a persistent Pest of Phlox. — Jl. Econ. 

 Entom., Concord, N.H., xi, no. 5, October 1918, p. 431. 



Phlox plants in certain gardens of Fayetteville, Arkansas, have 

 been infested for a number of years Avith a Capsid, Lopidea media. 

 This bug appears every year in the same gardens, causing the tender 



