Field collections of Aedes atropalpus (Coquillett) were made from 22 sites in the United States, Canada, and El Salvador. Laboratory colonies were established from each site. Among the 22 strains, 4 distinct types were evident. These correspond to 4 subspecies: A. a. atropalpus (Coquillett), A. a. epactius Dyar & Knab, A. a. perichares Dyar, and A. a. nielseni O'Meara & Craig. Based on adult and larval morphology, 16 diagnostic characters were discovered. In addition, A. a. atropalpus differed from the other subspecies in several physiological and behavioral characteristics. Type-form females were autogenous and reluctant blood feeders, whereas females of the other 3 subspecies were predominantly anautogenous and avid blood feeders. Moreover, the rate of larval development was considerably slower in all type-form strains. Although each form possessed many distinctive characteristics, all 4 forms were interfertile. Both museum specimens and live material were examined in an effort to determine the distribution of each form. Each subspecies is confined to a limited portion of the range of the species. A. a. atropalpus was found along the east coast, in the Appalachian Mountains, and in the northern Great Lakes region in the United States and Canada. A. a. epactius was observed in the United States (Arkansas, Colorado, Missouri, Oklahoma, and Texas) and in Mexico, while A. a. perichares was found in El Salvador and Costa Rica. A. a. nielseni was obtained from Utah and Arizona. Several U. S. National Museum of Natural History specimens from El Salvador appeared to be intergrades between A. a. epactius and A. a. perichares . Additional sampling in southwestern United States and Central America would improve our knowledge of both the range of the 3 southern subspecies and the extent of their intergradation.

中文翻译：

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atropalpus 的地理变异（双翅目：Culicidae）1

从美国、加拿大和萨尔瓦多的 22 个地点收集了 Aedes atropalpus (Coquillett)。从每个位点建立实验室菌落。在22个菌株中，明显有4个不同的类型。这些对应于 4 个亚种： A. a. atropalpus (Coquillett), A. a. epactius Dyar & Knab, A. perichares Dyar 和 A. a. 尼尔森尼奥米拉和克雷格。根据成虫和幼虫的形态，发现了16个诊断特征。此外，A.a. atropalpus 在几个生理和行为特征上与其他亚种不同。类型型雌性是自体和不情愿的吸血动物，而其他 3 个亚种的雌性主要是自体和狂热的吸血动物。此外，所有类型型菌株的幼虫发育速度都相当慢。尽管每种形式都具有许多独特的特征，但所有 4 种形式都是可生育的。博物馆标本和活体材料都经过检查，以确定每种形式的分布。每个亚种仅限于该物种范围的有限部分。A.A. atropalpus 发现于东海岸、阿巴拉契亚山脉以及美国和加拿大北部的五大湖地区。A.A. 在美国（阿肯色州、科罗拉多州、密苏里州、俄克拉荷马州和德克萨斯州）和墨西哥观察到了 epactius，而 A. a. perichares 发现于萨尔瓦多和哥斯达黎加。A.A. 尼尔森尼来自犹他州和亚利桑那州。来自萨尔瓦多的几个美国国家自然历史博物馆标本似乎是 A. a. epactius 和 A. a. 果肉。