. Handbook of medical entomology. Insect pests; Insects as carriers of disease; Medical parasitology. io8 Parasitic Arthropoda these seasons they are frequently to be found upon the windows of dwellings, where they are often mistaken for mosquitoes. The larvffl are worm-like, but vary somewhat in form in the differ- ent genera. Most of them are aquatic, but a few live in the earth, in manure, decaying wood, trnder bark, or in the sap of trees, especially in the sap which collects in wounds. Of the many species of Chironomidae, (over eight hundred known), the vast majority are inoffensive. The
. Handbook of medical entomology. Insect pests; Insects as carriers of disease; Medical parasitology. io8 Parasitic Arthropoda these seasons they are frequently to be found upon the windows of dwellings, where they are often mistaken for mosquitoes. The larvffl are worm-like, but vary somewhat in form in the differ- ent genera. Most of them are aquatic, but a few live in the earth, in manure, decaying wood, trnder bark, or in the sap of trees, especially in the sap which collects in wounds. Of the many species of Chironomidae, (over eight hundred known), the vast majority are inoffensive. The sub-family Ceratopogonins, however, forms an exception, for some of the members of this 77. Culicoides guttipennis; (o) adult, (x is); (&) head of same; (c) larva; (d) head; (e) pupa. After Pratt. known as sandflies, or punkies, suck blood and are particularly trouble- some in the mountains, along streams, and at the seashore. Most of these have been classed under the genus Ceratopogon, but the group has been broken up into a number of genera and Ceratopogon, in the strict sense, is not known to contain any species which sucks the blood of vertebrates. The Ceratopogoninse—The Ceratopogoninseare among the smallest of the Diptera, many of them being hardly a millimeter long and some not even so large. They are Chironomidae in which the thorax is not prolonged over the head. The antennas are filiform with fourteen (rarely thirteen) segments in both sexes, those of the male being brush- like. The basal segment is enlarged, the last segment never longer. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Riley, William A. (William Albert), b. 1876; Johanssen, Oskar Augustus, 1870-. Ithaca, N. Y. , The Comstock Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915
