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The larvae search for egg- pods, on which they feed, leaving baldjf the sconomia and the empty chorions of the eggs ; up to 28 larvae per egg-pod were found. Report of the senior entomologist. Accounts of the complex of species affecting grasshoppers in Canada and parts of the U.

A number of authors have reported high populations of Sphegidae actively capturing acridoid hosts, but no studies have been made to indicate what effect they have on populations of their hosts.

Ennemis des oeufs et des oothAques. Asia 97, Aden W. Asia, Transceucesia ;U. Siberia ;Yugoslavia 14 ; 87, 97,Algeria ;Ghana B. In general, only references to actual positive identifications and rearings have been quoted and taxonomic papers mentioning hosts have been omitted where another reference quoting field data was available.

RussiaCyprus 87 ; 32, U. Calliphoridae c Other Diptera.

Paradimeu Species of this genus are known as parasites of Hemiptera, and this suggests that the record from grasshoppers by Smithof P. It has been noticed that the Desert Locust is rarely parasitised in egg-fields of phase grqark. Many more eggs than are consumed are ruptured during the movement of the larvae, and frequently the whole egg-pod is reduced to unio mush infected by fungi and bacteria.


Soon after the host eggs would have hatched, the adult parasites emerge by cutting away the end of the galduf egg. Larvae have been kept alive for as long as three years without pupation taking place.

The Bombyliidae, Nemestrinidae and allied families, and the majority of the Coleoptera concerned, all diapause in the final larval instar and it is very diilkult to induce pupation.

A compilation of facts about its occurrence and control. Notes on the status of each genus therefore follow. Siberia ; 32, U. This seems to be general with locusts and is borne out by the absence of reports of significant parasitism in gregarious locust populations.

The ovipositor, which has a barbed tip enabling the female to retain its grip in spite of movements of the host, is inserted through such a puncture. It is clear that the status of some of the Bombyliids recorded as egg-predators is in doubt, and as most of the records of the larval habits of Bombyliidae refer to parasitisation of the larvae and pupae of Hymenoptera, Coleoptera, Lepidoptera and Diptera, it seems likely that further work will show that some of them are only casual predators of acridid eggs.

This is most easily achieved by using evonomia jar or specimen tube covered with gauze to prevent undue humidity in the container leading to the growth of fungi.

Asia, Transcaucasia ; 32,,U. The tropical species, and possibly some of the temperate ones, will only pupate if the soil europae which they are kept is alternately wetted and allowed to dry out. Greathead on the insect joran of Acridoidea Orthoptera in preparation.


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The most detailed account of the life history of a Perilampm is that of a species attacking caterpillar parasites Ehropea, Lanham and Evans, ; has been reported. Siberia dr 93, Mozambique Turkeshn A. Siberia 26,U. Since the life histories of all known bombyliid predators of acridid eggs are very similar, a generalised account will suffice.

The typical chalcidoid larvae, which feed on the dorsal surface of the host pupa within the puparium, are fully fed in about six days and the adults fig.

Greathead on the insect enemies of Acridoidea Orthopteru b Diptcra The Asilidae are the principal dipterous predators of Acridoids. Crimea, Trans- caucasia ; U. All three larval instars occur in the host, taking days to develop. Iraq in spring, Ukraine 91 43,Uruguay ; Acrididae, 43,Uruguay ; 46,Uruguay -.


There is some evi- dence that in the genus Epicauta the non-feeding stages are not obligatory and can be omitted under favourable conditions. Greathead on the insect enemies of Acridoidea Orthoptera 2. A brown chitinous breathing tube is developed, enclosing the terminal segments of the body of the larva fig. Siberia 97, Egypt 13 16, Oman A. Kirghizstan B.