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Rhodesia 76, S. Many insect enemies have behavioural or physiological mechanisms which help them to overcome the diBiculties, referred to above, that occur particularly with locusts, efonomia as mobility of the host populations. Post on Sep views.

It has therefore been thought worth while to prepare a review, chiefly for the aid of field workers, of the life histories and siglllficance of the more important group of insect enemies of Acridoidea. Rhodesia, Tanganyika 41, Argentina ; 42, Argentina 31 32, 97,n.

The only species, S. The fust catalogue is the more detailed, and lists the species of enemies under their families the genera being arranged alphabetically their Acridoid hosts, the country in which the records were made, and the relevant bibliographical reference. Greathead attempted to find characters of taxonomic importance for the separation of four species of Systoechus as larvae and pupae but found little in the shape or morphometrics of the third instar larvae ; the pupae are more easily separated, but for reliable identi- fication adults must be reared.

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There is only one generation a year, and this limits the value of Trichodes spp. Ovodeposizione, sviluppo e costumi delle prime larve di Stomatorrhina Zdia lunata Fab. The relationship of percentage incidence to actual mortality has been discussed recently by Thompson Kazakhstan 97, Pakistan Grasshoppers, Canada B.

Sur la biologie du Chrysochraon dispar Germ.

Since the embryonic period of the locust is longer days for the Desert Locust in East Africaemergence is complete before the locust eggs hatch and, by the time they hatch, the flies have dis- persed. DE,Le cavallette Schistocerca gregaria Forsk. Especially on the power of the oviposi- tion and the distribution pattern in host eggs of the egg parasites, Scelio uniion Watanabe and S. The habit of mound formation is a useful indication of the presence of T.

A REVIEW OF THE INSECT ENEMIES OF ACRIDOIDEA (ORTHOPTERA)

These authors discuss the possibility that S. Host selection appears to depend principally on size Zakhvatkin, ; authors observations rather than on any taxonomic grouping.

Asia, Transcaucaais ;U. Africa Natal ;S. As, however, taxonomists are not in agreement, and the behaviour of only a few species has been studied, these generic names have not been used in this work, but where known have been included in brackets in the catalogue.

The adult beetles appear in spring in temperate regions and at the beginning of the rains in tropical jorxan.

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A REVIEW OF THE INSECT ENEMIES OF ACRIDOIDEA (ORTHOPTERA) – [PDF Document]

The fully-grown larvae emerge through the host’s intersegmental membranes and pupate in the soil. Russia 15 ;U. Miltogrammine larvae have occasionally been found in circumstances similar to those in which Cyrtonoturn cuthbertsoni are found see abm and are also of negligible importance.

When the present author has doubts as to the correctness of either the record or the identification, asterisk precedes the record. Liebermann bin Argentina, investigating the oviposition of Swtmsa c l kfound that this species lays on the leaves of Eryngium Umbelliferae ; A w t a – tus bmsanii and Centrodera liebermanmi Aphelinidae were reared from its eggs.

Turkestan ; 32,U.

Murai found that S. In Menaoria de la campana contra la langosta en Greathead on the imect m m k of Acridoidea Ortbplma IX. Williams and Haskell have made observations on large numbers of Sphex aegyptius preying on swarms of the Desert Locust, which were followed unoon the wasp. In East Africa, feeding is rapid and is completed hnion one to two weeks. Rhodesia 75 76 ; S. Noble found that egg-pods are attractive for 48 hours, but Pemberton and Murai have shown that oviposition can occur at all stages of the development of the host.

Siberia ; U.