The San Francisco Call. Newspaper, April 26, 1903, Page 14

THE SUNDAY CALL. BerKeley Epfomolog wonderful oze discoverv . APHIS inGLESS) : = | One of the Species on Which Warren T. Clark Artificially De- veloped Wings. It Is One of the Most Destructive Insects in - the West. way to hitherto undreamed of possibili- tles in field of biviogy. These tiny aphids are among the most imerou both as sgards species and g e INES snai s, of all known insects, and, ac s, cord o the report c¢f the State Board t of Horticulture destruction caused a by them is commensurate with thefr num- g bers. There is scarcely a plant that is 3 attacked by them, and some plant he grape, peaci, le. cabba hids peculiar to them They are all small, soft bodied insects 1 a body more or Iking in your ging to the : 2 Sk Son La Framce lice are aerial in their habits, but some "°® varieties also assume a subterranean = s 1 2dmirer. ¢, and these are among the most de- n that the structive and widespread, the dreaded = Mr. Clark’s discovery is to be Phylloxera and woolly aphis being the « test degree, On the best known. p f the Uni. Their methods of reproduction are most . eates; Unique and peculiar to themselves and th © Breatest g fferent forms they assume—some winged = he world 1pon his ac- ang gthers wingles: yme laying e of highest im- others bringing forth young alive d one whic has opened the often without the intervention of. COLORED ART MASTERPIEGES “PRESIDENT ROOSEVELT"” the best and mest characteristic portraits ever made of the Presi life size study soks s0 quarter reproduced in delicate flesh tints on a much like & painting that it is hard to tell the very close and careful study. As President Roosevelt will be in s than two weeks this is a splendid opportunity to get a good picture of r either window or mural decorations, e — If You Tried to Buy this Picture of President Roosevelt at the Stores it would cost $150. er and " nia in le absolutely free, (May 3) “KING OF THE FLOCK” (May 3) BY E. R, MAES. if you have ever had a love of nature as expressed in the pride and activity of the barnyard fowl. this remarksble creation of Artist Maes will appeal to you as no other picture of this subject has ever done before. It is impossible to describs the beautiful effects, the reglism and the idealism, that half humorous, half etic, paternal quality combined in this picture, It is a study for young and old —_—_—————— Watch for this Beautiful Art Supplement with the Next,Sunday CALL. SESENEENNEEEEE § ge, e'c w S8 pear shaped, the winged form having two pairs of delicate, transparent wings. The majority of plant h FOorP APHIS (WINGED) Bottle Containing Wingiess Aphis, Feeding on Ross Plant Ynserted In Band, Saturated With Magnesium to £ Produce Wings Artificially. e | | l male, which In many produced called honey dew, which ed back sect, naked eve pr be bees, wasps and ants it is stroy fa lic a will e forth its honey dew, which the tbe chemic ant will immediately drink up. The ants plant. T take good care of their cows and will with a ¢ transport them to new pastures when old ones fail, thus aiding greatly*in their dis- fact, for the corn root louse is destruction of the ants’ nests, the Inmates of which mine along the roots of the corn, collect plant lice and distribute them on tri mended world have ries of scien How the Insect Looks After the Berkeley Entomologist De- veloped the Wings With Chem- It Is Enlarged Over 100 icals. Times. | I 2 o through two near the oduced in neath. ct. A plant ot bution. In the roots. These aphids obtain their sustenance by sucking the juices of plants which they the chemi infest by inserting thelr proboscis in woody Mr. Clark had 4 plants. in the tender terminal growths, in the propaga peduncles of roses, etc., end in the suc. culent parts of plants and roots. the amount taken by most Infinitesimal, bers cause most serious plant they Infest and ofttimes its com- plete destruction. They multiply with such astonishing rapldity that a world famous sclentist once humorously computed that if nothing Wwere done to destroy them the offspring of a single aphid would, In three years' time. make a mass as big earth and long enough to #in. It can be readily | 2oesee Peeee sees s sttt tes sttt te s setes esesetseetsee B TR~ THE COWSLIP. in some forms has puzzling to ologist. varjeties tubes posterior part of the which can readi This Is the substance when large quantities T from shade trees and spots the sidewalk gan s This honey dew Is devoured by various che commonly believed that ants de- plant lice; but the contrary The ant treats and regards plant as milch cows e, place its antennae on k. stroking it gently THE NIGHT MAN'S STORY. THE STRIPED CHEST. GREAT IDEA. AlL three by JOSIAH FLYNT and FRANCIS ADELIA IN ARCADY. THE LOST OPPORTUNITY. By ELIZA ORNE WHITB. never ke them at once in- the natu: a sweet substance is s exud- 1 the in- situated ¢ be seen with that drips a Procurin six inches high, clean white sand. a small twig of approach several wingless its Send was used when the louse that atsolut is the An ant will magnesium, wh the remedy recom- the Loeb land Insects. It While an indlvidual is al- thelr immense num- injury to the ifornla, but In pleteness of th further in his that the growth of the year. for it is only by around as the reach to the seen, therefore, test unc search. The process Dr. Loeb applied to mari tonishment of the w been applying to ins discovered the T of life in the marine world, notable achievements ever order ecked filled it bottle that thers BY THE BEST FICTION WRITERS OF TWO CONTINENTS. A DAUGHTER OF THE AURORA. AT THE RAINBOW’'S END. All ‘thres by JACK LONDON. THE ROADMASTER’S STORY. THE SWITCHMAN’S STORY. All four by FRANK H. SPEARMAN. Both by A. CONAN DOYLE. THE REVENGE OF THE FOUR. Both by JOSEPHINE DODGE DASKAM THE TIPSTER. All three by EDWIN LE RE. Read This Remarkable List: SIWASH. THE WIPER'S STORY. KING OF THE FOXES. ON SENTENCE DAY. WALTON. THE MADNESS OF PHILLIP. THE MAN WHO WOY. THE KING VISITS. By ROBERT BARR. FOR THE HAND OF HALEEN. By NORMA DUNCAN. R ONE OF THESE STORIES FREE WITH EVERY EDITION OF SUNDAY CALL experiments with » prove his theory. about of the meost de in Cal- should be no mistake whatever about the com-~ resuilts obtained experiments and of wings went proved could be n- et sesssssse e creased or retarded at will at any seasom And thus was an absolutely new fleld in the exploration of biolog: knowing characteristics of any destr that they can be successfully coped with when they become a pest. -~ cpened up, the habits and ctive insect - Ttesessers st I e