New species of Eylais (Acari: Hydrachnellae; Eylaidae) parasitic on water boatman (Insecta: Hemiptera: Corixidae), and a key to North American larvae of the subgenus Syneylais. Canadian Journal of Zoology, 64(10) 1986: 2363-2369. 2365 [Zoological Record Volume 124]