Bulletin . antivérifications sur l'augmentation des autres insectes. Certains sont des externalparasites, suçant le sang-vie de l'hôte; d'autres infestle corps de la caterpillar. Les larves de certains de ces thosequi infectent le corps de la chenille se sont déloties, lorsqu'elles sont entièrement g-noient, et font tourner un cocon à la surface de l'hôte. -30- un exemple est un PAN teles eo)i,iire,i;-atiis, ( Fig:. 16.) qui infecte le ver de tomate. D'autres, ag^ain, pupate dans le bod3^ de l'hôte, qui, dans certains cas, est également entré dans le pupastate. Des exemples de ce genre sont trouvés dans l'ichneu-mon qui infeste le larvai de t

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Bulletin . antchecks upon the increase of other insects. Some are externalparasites, sucking the life-blood of the host; others infestthe body of the caterpillar. The larvae of some of thosethat infest the body of the caterpillar bore their way out, whenfull-g-rown, and spin a cocoon upon the surface of the host. -30- An example is A pan teles eo)i, iire, i;-atiis, ( Fig:. 16.) which infeststhe tomato worm. Others, ag^ain, pupate within the bod3^ ofthe host, which, in some cases, also has entered the pupastate. Examples of this kind are to be found in the ichneu-mon which infests the larvaI of the Thistle Butterfly, Pyrameis cardiii., and another ichneumon whose host is thecaterpillar of Papilio djax.Careful notes should bemade of all parasites ob-served—of their habits oflife, method of pupation, and^4, ^ effect upon the host. And Fig. IS. Parasitism: Tomaiu worm determinations should becovered with cocoons of Apanteics made at the earliest possible congreffatiis. Sketch by Will C. coLLixs. date.. DISTRIBUTION. Every species has its life zone. Some, e. g^., the Anosiaplexippus and Pyrameis cardui, are well-nig-h universal, whileothers have a ver} narrow life-zone. The rang^e of an}species is determined b_v climatic conditions as well asb}^ thedistribution of its food plant. Locality lists are very help-ful in determining the question of distribution. Ever} ob-server should make the list for his locality as larg-e and com-plete as possible. NUMBER OF BROODS. The number of broods of any species is influenced b_vlatitude. In the southern states, where the warm season islengfthened out. the number exceeds that of a colder climate.In Florida, for example, Papi/io crcsphoiites has a successionof broods throug^hout the year; in the vicinity of Cincinnatithere are but two broods in a season. Ag-ain, the numbervaries with the species. Argyuuis diaiia, Telea polypJieniiis, and man} others have but one brood ; Papilio ajax, Dataiiaperspiciia, and others have two broods; while Pi

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