. Annual report, including a report of the insects of New Jersey, 1909. 774 REPORT OF NEW JERSEY STATE MUSEUM. CESTRUS Linn. O. ovis Linn. The sheep-bot. This species lives in the nasal and other head pass- ages of sheep and causes a disease known as staggers, often resulting in death. CUTEREBRA Clark. C. buccata Fab. Ocean Co. VI (Sm); Dunnfield VII, 12. A species living under the skin of rabbits. C. horripilum Clark. Riverton VII, Fig. 321.—The sheep-bot, CEstrus ovis: T, flies, wings closed and open; j, pupa; 4, 5, full grown larvae; 6, young larva. Family TACHINID.^. The Tachina flies
. Annual report, including a report of the insects of New Jersey, 1909. 774 REPORT OF NEW JERSEY STATE MUSEUM. CESTRUS Linn. O. ovis Linn. The sheep-bot. This species lives in the nasal and other head pass- ages of sheep and causes a disease known as staggers, often resulting in death. CUTEREBRA Clark. C. buccata Fab. Ocean Co. VI (Sm); Dunnfield VII, 12. A species living under the skin of rabbits. C. horripilum Clark. Riverton VII, Fig. 321.—The sheep-bot, CEstrus ovis: T, flies, wings closed and open; j, pupa; 4, 5, full grown larvae; 6, young larva. Family TACHINID.^. The Tachina flies are almost all parasitic and of the very highest use- fulness, since they form the chief control of many caterpillars. They resemble house-flies, flesh-flies, and blue-bottles in appearance, but are much more bristly; sometimes formidable-looking from the array of sharp points projecting in every direction. The bristle on the third antennal joint is always bare, and this is the best char- acter for the recognition of the family. These flies often lay their eggs on the outside of the caterpillar, usually just back of the head, where the larvas cannot easily get at them. They are white in color and quite large enough to be easily seen. Cut-worms are a common prey of these flies; sometimes of hundreds of such larva gathered not two per cent, will be free of these white eggs. In an army worm year sometimes scarcely one per cent, of the last brood is free. Anywhere from one to 100 grubs may infest a single caterpillar, depending upon the size of the host. GYMNOCLYTIA B. & B. (CISTOGASTER.) G. immacuiata Macq. Westville VI, 26 (Jn); Glassboro VII, 8 (CG); Clementon V, 30, IX, 5 (Hk). G. occidua Walk. Dover VI, 17, Chester VII, 25, Westville, Atco VII, 12 (Jn); Middlesex Co. VII, 7, Jamesburg VII, 4 (Sm).. 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 m
Size: 1715px × 1457px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcontributorthe, bookdecade1910, bookyear1910
