. Cattle ticks (Ixodoidea) of the United States. Ixodidae; Ticks. SEVENTEENTH ANNUAL REPORT. 411. is apparent that in changing from the hexapod to the octopod stage 0. Megnini passes a resting pupa-like stage. This is by no means surprising, since the differences between the hexapod and the octopod stages of the Argasidae are far greater than those between the corresponding stages of the Ixodidae. This is apparently the stage which Townsend (1893) interpreted as an egg. The specimens in question were taken on post- mortem examination from the ear of cattle in San Dimas, Cal., by Mr. M. L. Ecke
. Cattle ticks (Ixodoidea) of the United States. Ixodidae; Ticks. SEVENTEENTH ANNUAL REPORT. 411. is apparent that in changing from the hexapod to the octopod stage 0. Megnini passes a resting pupa-like stage. This is by no means surprising, since the differences between the hexapod and the octopod stages of the Argasidae are far greater than those between the corresponding stages of the Ixodidae. This is apparently the stage which Townsend (1893) interpreted as an egg. The specimens in question were taken on post- mortem examination from the ear of cattle in San Dimas, Cal., by Mr. M. L. Eckels, and sent with other stages of the same tick to this laboratory for determination. ^ ^ ^ tick after This tick is remarkable for the difference in shedding the nymph appearance between the young spiney stage and originar''^^^ enlarged, the adult form, a difference that is so great that the two stages have been described as belonging to different species. The ear tick has been reported to this Bureau a number of times, notably from Texas, New Mexico, California, Kansas, and Nebraska. It was originally described from Mexico b}^ Duges, who gave the fol- lowing account of it: Argas Megnini Alf. Dug.^—This epizoon, very abundant in the State of Guanajuato, is found on the horse, the ass, and the ox, principally in the ears, and is spread fre- quently to other animals, in particular to man, for I have often removed it from the ear passage of children, and even of adults. The body of the Garrapata, wider anteriorly than posteriorly, in the shape of a guitar, is less depressed than that of the Turicata. It is covered with little horny spines, the color of mahogany, surrounded by a border at the base; the general color is lead color, with legs of deep yellow. The male, very small compared with the female, and yellowish when it is fasting, has large legs comparatively, the largest being those of the pair IV. The legs are more robust than those of the Turicata, ^Argas Megnini
Size: 1528px × 1636px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1902
