The book The National Collection of Coccidae was written by author United States. Bureau of Entomology Here you can read free online of The National Collection of Coccidae book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The National Collection of Coccidae a good or bad book?
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Ac- cording to Niisslin (1911), who examined 16 genera, the eighth ter- gite is not covered in either sex in 11 genera, and is exposed in the male and covered in the female in 5 genera. The writer has found PEELIMINAEY CLASSIFICATION OF SCOLYTOIDEA. 181 the eighth to be uncovered in both sexes in three genera, uncovered in the male and covered in the female in 13 genera, and covered in both sexes in 3 genera. According to the writer's classification, the 31 genera in which species were examined... by Niisslin and the writer represent the following subfamilies : Table III. — Abdominal tergites in the subfamilies of Scolytoidea in which species were examined by Niisslin and the writer. Subfamily. Cryphalinae Ipinse Corthylinae Micracinse Crypturginse... PMoeotribinas . HylesiniiiEe Scolytinse Platypodinffi . . Eighth ter- gite uncov- ered in both sexes. Genera. Total. Eighth ter- git« uncov- ered in male, not in female. Genera. Eighth ter- gite covered in both sexes. Genera. From the foregoing it will be seen that the characters of the seventh and eighth tergites are paralleled in widely separated genera and sub- families.
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