The North American Entomologist, Volumen1

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Augustus Radcliffe Grote
Reinecke & Zesch., 1880 - 104 páginas
 

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Página 33 - ... right over its mouth. In this position she works with a vigor that would indicate combined pleasure and purpose— moving her head and body from side to side, and apparently making every effort to force the pollen into the tube. Such is the method by which our Yuccas are fertilized.
Página 29 - ... Prof. Riley that the supposed gall is in reality a coccid, hence it is probable that the Eudemensia feeds upon the egg of the coccid in the same way that Dakruma coccidivora feeds upon the eggs of the Pulvinaria. I have bred over forty specimens of Dakruma coccidivora from Pulvinaria innumerabilis.
Página 1 - ... coloring, and the exceedingly interesting new biological details presented. The North American Entomologist is a new candidate for favor and support, of which two numbers have appeared. It is a monthly periodical, published at Buffalo, NY, under the editorial charge of AR Grote. It purposes to present articles of value both to the specialist and the agriculturist on the subject of North American insects, together with notices of current entomological literature. Descriptions of the Noctuidae...
Página 33 - With her maxillary tentacle, so wonderfully modified for the purpose, she collects the pollen in large pellets, and holds it under the neck and against the front trochanters. In this manner she sometimes carries a mass thrice the size of her head.
Página 15 - But it must not be forgotten thut the conidia ripen in early summer ; and, if knots are seen in the spring, they should be cut off at once. Not only should diseased branches of cultivated cherries and plums be removed ; but all means should be taken to destroy the choke cherry, the bird cherry, and the wild plum, in the neighborhood of orchards. In New England, particularly, the choke cherry can only be regarded as a pest. We notice that Mr. Emerson, in the new edition of his " Trees and Shrubs of...
Página 32 - ... present time, and of •which very few forms have become extinct. I have used the word species so often, that you will doubtless be inclined to ask, what, then, is understood by a species ? Alas ! I can tell you no more than has been told recently by many others. It is an assemblage of individuals, which differ from each other by very small or trifling and inconstant characters, of much less value than those in which they differ from any other assemblage of individuals. Who determines the value...
Página 25 - On farther examination it was found that very many of the bark-lice afforded retreats for similar larvae. This, with the fact that the eggs deposited by such individuals, or the young' lice developed from them had been destroyed, indicated that the Pyralid larvae were predaceous.
Página 26 - Maxillae rust red with the basal half clothed with white scales interspersed with a few black ones. Thorax above, and patagia dark gray with brown and green reflection. Abdomen annulated with brown and light gray; the brown predominating above, the light gray beneath.
Página 28 - Westwood is of the opinion that in each case the lepidopterous larva feeds upon the waxy excretion of its host without in any way injuring it. Second, the two Tineids, mentioned by Mr. Westwood (1. c., 1877, p. 436) as being parasitic upon the threetoed sloth. Speaking of these moths he says...
Página 43 - ... and gradually a little shorter to the penultimate ; ultimate joint about as long as the two preceding ones together, conic-ovate, with a very slight appearance of being threejointed : thorax, anterior segment in breadth at least equal to twice the length ; suture at the scutel not dilated : scutel obtusely rounded behind : wings hyaline ; nervure much arcuated from the edge, its confluence with the edge about as long as the branch, which is subclavate: abdomen polished, impunctured ; above oval;...

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