. Insects affecting domestic animals [microform] : an account of the species of importance in North America, with mention of related forms occurring on other animals. Parasites; Insects, Injurious and beneficial; Animaux domestiques; Insectes nuisibles. SUUORDEU MALLOPHAOA. 193 1 the acconi- lias boun generally aciiuptutl by En^liHli uiid American writers us the hologOMtir^ this buiiif; duo to the desiuiptitm and llguro given by Denny, who does not seem to liave seen the true holoijnHfcr, but described for it, according to I'iaget, an immature HiK;cinten of the hirger Hpecies since de'icribed
. Insects affecting domestic animals [microform] : an account of the species of importance in North America, with mention of related forms occurring on other animals. Parasites; Insects, Injurious and beneficial; Animaux domestiques; Insectes nuisibles. SUUORDEU MALLOPHAOA. 193 1 the acconi- lias boun generally aciiuptutl by En^liHli uiid American writers us the hologOMtir^ this buiiif; duo to the desiuiptitm and llguro given by Denny, who does not seem to liave seen the true holoijnHfcr, but described for it, according to I'iaget, an immature HiK;cinten of the hirger Hpecies since de'icribed as GoniocntcH idxloininalis Piaget. The holofjaHtir is only about I mm. in length, whereas theabilominalis, or Denny's holoijaHtn'^ is about.'{ mm. In general ibrm ttie sjiecies are somewhat simihir, the hnloijaHtrf being less constricted at the thorax and more regularly ta])ering to t\w 4'nd of the abdomen. Tiie head is more nearly quadrate; the ab(h)men not so conspicuously marked, the incurved margins of the segments not extending so decidedly upon the disk and presenting the distinct lines seen as a border to the fasciie iu ahdominalin. liAUaK (JiriOKKN IjOUHE. {llonioculen abilomiiialia I'iiiget; -= (!. giga» TiiHchnnberg.) This is probably fully as c(unmon as the precotling species. As already stated, it is the form which has been commonly referred to in Knglish and American works as the-O'o/t/o- cotes holoffmtcr, which d<)ubtless accounts for its not having been des(!ribed until (juite recently. It is a large, conspicuous species, about 3 millimeters iu length, quite broad, the head nearly cinmlar in front and constricted behind, the thorax small, the abdomen widening to near the end and termi- nating abruptly. The head, thorax, and legs are yellowish, with dark margins and spots; the abdominal seg- ments bear lateral whitish fasciie bor- dered with black. It appears to be much less common than some other species of chicken lice, notably Menopon iniUidum and L'qteu-
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashi, bookyear1896
