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he kan an wen zhong qun nei zhong hua an wen bu tong lei xing de yan jiu . luan de xing tai bi jiao
Pages: 862-872
Year: Issue:  6
Journal: Acta Entomologica Sinica

Keyword:  中华按蚊板型形态比较浮器不同类型甲板相关特征形态特征地理分布频率分布;
Abstract: A morphological study of the eggs of Anopheles (A.) hyrcanus sinensis from dif-ferent parts of China was made. It was found that there were four different types,namely, the small narrow-decked type, the large narrow-decked type, the small wide-decked type, and the large wide-decked type. The distinguishing characters of these eggsare distinct and there are no intermediate form. We believe that the differences are ofspecific significance, very often eggs of two or three types may occur in the same placeand may be found together in the same breeding place, each of them has its own specialbreeding environment. The morphological characters of the 4 different types of eggs are given briefly asfollows: 1. The small narrow-decked type: Shape slender, anterior and posterior ends ratherpointed. Deck very narrow. Egg length 516.0--748.2 μ, average 590.7 μ, the majoritybetween 576.6 and 593.4 μ, width 172.0--269.4 μ, average 196.5 μ, majority 189.2 μ.Dorso-ventral distance of the egg, 111.8--172.0 μ, average 130.5 μ, majority 129.0 μ.Width of the deck, 8.6--55.9 μ, average 18.1 μ, majority 17.2 μ, being less than 1/10of the egg width. Float length 344.0--559.1 μ, average 411.4 μ, the majority being be-tween 387.0 and 421.4 μ, and about 70% of egg length. From posterior end of thefloat to posterior end of the egg the distance was short, 60.2--129.0 μ, average 95.7 μ,majority 86.0 μ. Number of ribs 20--40, average 26.9, majority 30. Number of bossesof anterior end of the egg 2--8, average 4.3, majority 4. 2. The large narrow-decked type: The egg shape stouter, both ends of the eggmore rounded. Egg length 576.2--679.4 μ, average 635.3 μ, majority 653.6 μ. Width189.2--240.8 μ, average 212.1 μ, majority 197.8 μ. Dorso-ventral distance of the egg129.0--163.4 μ, average 158.6 μ, majority 137.6 μ. Width of the deck 17.2--60.2 μ,average 35.8 μ, majority 34.4 μ, equals to 16.9% of the width of egg. Float length361.2--464.4 μ, average 403.2μ, the majority being between 378.4 and 421.4 μ, andequals to 63.5% of the egg length. The distance between the posterior end of the floatand the posterior end of the egg was 103.2--17.2 μ, average 137.4 μ, the majority beingbetween 129.0 and 146.2 μ. Number of ribs 21--31, average 25.5, majority 27. Num-ber of bosses of anterior end of the egg 3--8, average 4.2, majority 6. 3. The small wide-decked type: Shape of the egg more stout. Egg length 524.6--799.8 μ, average 631.2 μ, most of them 584.8 μ. Width of the egg 172.0--240.8 μ,majority of them 206.4 μ. The dorso-ventral distance of the egg 120.4--189.2 μ, average153.5 μ, most of them being 146.2 μ. Shape of the deck is shoe-like, the central part is slender and the two ends are broad. Width of the deck 17.2--86.0 μ, average 51.2 μ,majority of them 51.6 μ, and equals to 20.4% of the egg width. Float length 266.6--516.0 μ, average 398.3 μ, majority 378.4 μ, and equals to 63.1% of the egg length.The distance from posterior end of the float to posterior end of the egg was 77.4--223.6 μ, average 141.9 μ, most of them 154.8 μ. Number of ribs 18--37, average 27.2,most of them 27--28. The bosses of the anterior end of the egg were 4--9, average 5.9,most of them 6. 4. Large wide-decked type: This type is well known and is considered to be theegg of typical Anopheles (A.) hyrcanus sinensis. Egg length 507.4--696.6 μ, average605.9 μ, majority 636.4 μ. Width of the egg 180.6--223.6 μ, average 200.1 μ, majority206.4 μ. The dorso-ventral distance of the egg 129.0--163.4 μ, average 139.6 μ, ma-jority 146.2 μ. Width of the deck 60.2--120.4 μ, average 92.3 μ, most of them 86.0 μ,and occupies 46.1% of the egg width. Float very short, length 249.4--421.4 μ, average330.6 μ, majority 335.4 μ, and equals to 54.5% of the length. The distance betweenthe posterior end of the float to posterior end of the egg was 86.0--215.0 μ, average152.4 μ, majority 154.8 μ. Number of ribs 16--33, average 24.2, most of them 22.The number of bosses of the anterior end of egg was 4--10, average 7.5, majority 7. It was found t
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