The external and internal parasites of man and domestic animals [book]

A. E. Verrill
1870 unpublished
Yet in those they are confined to particular orders and families. Among the Arachnids we find parasites only in the lowest order, which includes the mites, the true ticks, the itch-insect, etc., but among the Hexapod insects we find that the parasites belong mostly to two of the seven orders into which they are naturally divided. The seven orders of six-legged insects are based on many anatomical differences, but they are characterized, also, by FIGURE 6. Lithobius Americanus Newport, natural
more » ... Newport, natural size; color yellowish brown. From Packard's Guide. 6 BOARD OP AGRICULTURE.
doi:10.5962/bhl.title.55740 fatcat:jsipgtxy7bhkvfkditihrekdva