. Destructive insects. Insect pests. 27 — V. INTERNAL PARASITES. DiABROTicA Parasite. Celatoria crawii, Pupa. Imago. Fig. 31. Larva. This is an internal parasite of the well known twelve-spotted squash beetle, so common in fruit-growing districts, and is one of the rare instances that have been recorded of a beetle being destroyed by the larv£e of a fly. It is not only interesting to an entomologist, but it is of great assistance to the horticulturist in reducing the numbers of such a serious pest. I discovered this parasite in the neighborhood of Los Angeles, where I collected a
. Destructive insects. Insect pests. 27 — V. INTERNAL PARASITES. DiABROTicA Parasite. Celatoria crawii, Pupa. Imago. Fig. 31. Larva. This is an internal parasite of the well known twelve-spotted squash beetle, so common in fruit-growing districts, and is one of the rare instances that have been recorded of a beetle being destroyed by the larv£e of a fly. It is not only interesting to an entomologist, but it is of great assistance to the horticulturist in reducing the numbers of such a serious pest. I discovered this parasite in the neighborhood of Los Angeles, where I collected a large number of the beetles, and found that fully one third were parasitized. I have found them in the larval state in the beetles as early as Ma}^ and as late as the middle of October. The May brood pupate early in June and remain in this condition about two weeks, when they change to the winged form. They are numerous in July and August. I have sent colonies to different sections of the State, and hope they will become established. Mr. Ed. M. Ehrhorn, of Mountain View, Santa Clara County, informs me that he found several Diahrotica trivittata containing larvte of the Celatoria. This is very interesting, as it shows that they will also attack the striped squash beetle. The following description is taken from "Insect Life," Vol. II, page 235: Male.—Frontal vitta blackish brown; sides of front white, tin<ied with yellow; face white; palpi reddish yellow; antennae black. Thorax grayish black, destitute of stripes, the bristles not disposed in rows. Scutellum grayish black; abdomen black, mottled. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. State board of horticulture. Division of entomology. [from old catalog]; Craw, Alexander. [from old catalog]. Sacramento, A. J. Johnston, s
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsectpests, bookyear
