. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. Fig. 21S.— Tarsoncmus pallidus t ration.) (Author's illus- In 1850 Newport gave the name Heteropus ventricosus (fig. 214) to a mite found on the larva of a wasp. Since then similar mites have been found on various insects. both alive and dead. The generic name was preoccupied, and was changed to Ped- iculoides^ by Targioni-Tozzetti in 1875. The species has become of much economic importance, since it is frequently para- sitic upon injurious insects. The abdo- men of the pregnant female (fig. 216) swells
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. Fig. 21S.— Tarsoncmus pallidus t ration.) (Author's illus- In 1850 Newport gave the name Heteropus ventricosus (fig. 214) to a mite found on the larva of a wasp. Since then similar mites have been found on various insects. both alive and dead. The generic name was preoccupied, and was changed to Ped- iculoides^ by Targioni-Tozzetti in 1875. The species has become of much economic importance, since it is frequently para- sitic upon injurious insects. The abdo- men of the pregnant female (fig. 216) swells to an enormous size, this being due to the development of the eggs. These not only hatch within the parent, but obtain their entire development there, and issue as sexually mature males and females. These may wander about for a time on the body of the mother and soon pair. The body of the male (fig. 215) ends in a broad sucker, wherein is situ- ated the penis. The tip of the female is grasped by this sucker. P. ventricosus Newp. occurs commonly in this country, and another species has been found on the larvae of scolytid beetles. Prof. Herrera, the Mexican entomologist, endeavored without success to breed a Mexican spe- cies to kill the grubs of the cotton-boll Some species with a more dis- tinctly segmented body and with short legs have been placed by Renter in a new genus—Pediculopsis. One species, P. dianthophilus Wolcott, is a serious pest to carnations, and the principal agent in the distribution of the "bud-rot" of these plants. The mites burrow down inside the buds to feed on the tender tissues within and, going from bud to bud, carry the spores of a fungus which produces the rot. In this species the gravid female is egg shaped and not spherical. It is closely related and possibly identical with the P. 'graminum Renter of northern Europe, which occurs on grasses and is said to be one of the causes of "silver ; Some species of Pedicul
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