[Observed].

A. Suijkerbuijk
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引用次数: 35

Abstract

Polyplax alaskensis was first described by H. E. Ewing (1927, Proc. Ent. Soc. Wash., 29 : 118-121) from a single male taken from a mouse, Microtus sp., in Alaska. No subsequent collecting records of this species have been found in the literature. During the summer of 1948 a large series of individuals of both sexes was secured from mice, Microtus o. operarius (Nelson), collected on the Seward Peninsula by the writer. Since the original description is brief and unfigured, I am including here a further description of the species based on the numerous specimens now at hand. Acknowledgments are made to J. C. Bequaert of the Museum of Comparative Zoology and to Floyd G. Werner of the Harvard Biological Laboratories for aid and advice. I am also very grateful to C. F. W. Muesebeck of the Bureau of Entomology and Plant Quarantine, U. S. Department of Agriculture, for corroborating the identification by comparing a specimen from my series with the type. Female (Fig. 1, A). Length 1. 2-1.4 mm. Head almost as broad as long and generally similar to that of spinulosa ; first antenna joint much longer than the others and set close to the anterior margin. Thorax dorsally similar to that of spinulosa ; ventrally, the sternal plate is longer than it is broad; the anterior lateral margins are nearly parallel ; the posterior lateral margins are concave and slope to a blunt point ; the legs, of usual form, are of increasing size posteriorly. Pleural plates : (Fig. 2, B) first pleurite elongate, faintly if at all chitinized medially and usually with three
(观察)。
Polyplax alaskensis最初由H.E.Ewing(1927,Proc.Ent.Soc.Wash.,29:118-121)从阿拉斯加的一只小鼠Microtus sp.中提取的雄性进行描述。在文献中没有发现该物种的后续采集记录。1948年夏天,作者在苏厄德半岛收集了一大批雄性和雌性的小白鼠,它们都是由作者保护的。由于最初的描述是简短的,没有经过修饰,我在这里根据手头的大量标本对该物种进行了进一步的描述。感谢比较动物博物馆的J.C.Bequaert和哈佛生物实验室的Floyd G.Werner提供的帮助和建议。我也非常感谢美国农业部昆虫学和植物检疫局的C.F.W.Muesebeck通过将我的系列标本与该类型进行比较来证实这一鉴定。女性(图1,A)。长度1。2-1.4毫米。头部几乎和长的一样宽,通常类似于多刺;第一天线关节比其他天线关节长得多并且设置为靠近前边缘。胸部背侧类似于棘突;腹面上,胸骨板比其宽度长;前侧缘几乎平行;后外侧边缘是凹的并且倾斜到钝点;腿,通常的形式,是增加的大小后方。胸膜板:(图2,B)第一个胸膜延长,如果有轻微的内侧壳化,通常有三个
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来源期刊
Tijdschrift Voor Diergeneeskunde
Tijdschrift Voor Diergeneeskunde 农林科学-兽医学
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12-24 weeks
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