. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 42 THE WHITE SWAN LOUSE. {Ornithobms cygni Denny ; Ornithobius bucephalus Giebel.) This large and handsome species was quite certainly recognized by Eedi and figured by him and has received frequent mention since. It is a conspicuous species and appears to occur in great abundance on different species of swans, so that it is readily obtained. It has been recorded as occurring on the domestic and wild swan of the old world as well as the miisicus and Beicickii, and we have tsiken it in great abundance from the com
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 42 THE WHITE SWAN LOUSE. {Ornithobms cygni Denny ; Ornithobius bucephalus Giebel.) This large and handsome species was quite certainly recognized by Eedi and figured by him and has received frequent mention since. It is a conspicuous species and appears to occur in great abundance on different species of swans, so that it is readily obtained. It has been recorded as occurring on the domestic and wild swan of the old world as well as the miisicus and Beicickii, and we have tsiken it in great abundance from the common swan of this country, probably the Trumpeter Swan. The body in this species is whitish, but so trans- parent that all the internal organs are easily seen through the body walls. There are black points at the outtT hind margins of about four of the abdominal segments, as shown in the figure, and the last segment is dusky or nearly black. It is 4 millimetres long (one-sixth of an inch) and the body rather slender and decidedly flattened. Altogether this species seems to be almost as beautiful and as graceful in its movements as the bird which harbors it. Some of the specimens we have secured appear to contain blood, and while these parasites are not supposed to extract blood from their hosts it is possible that they may at times burrow deep enough to secure access to the capil- laries or feed upon blood that may have exuded from wounds upon the surface of the body of the Fig. -Ornithohius cygni. (Original.) THE LOUSE OF THE CAT. {Trichodectes subrostratiis Nitzsch.) While it is possible that this parasite was referred to by Ctto Fabri- cius about the year 1780 under the name of Fediculus catiis, the first certain reference to it appears to have been the description by Nitzsch in 1818. Since that time it has been referred to by nearly all writers on the common parasites of ani- mals, but so far as we know there has been no special descrijUion of the diflerent stage
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