Abstract
Abstract Two new black fly species, Simulium (Simulium) pothigaiense sp. n. and Simulium (Simulium) valparaiense sp. n., are described based on females, males, pupae and larvae. Simulium (Simulium) pothigaiense sp. n. is characterized by a claw simple without subbasal tooth and the base of radial vein with hair tuft in the females, maxillary palp with small sensory vesicle in the males, pupal gill with 10 short slender filaments and very short common basal stalk in the pupae and 5 hypostomal bristles per side lying parallel to lateral margin in the larvae. Simulium (Simulium) valparaiense sp. n. is characterized by hind basitarsus 6.6 times as long as its greatest width and claw with small distinct subbasal tooth in the females, gonostyle in medial view 2.3 times longer than coxite in the males, common basal stalk of pupal gill 0.31 times as long as interspiracular trunk, and larval thoracic and abdominal cuticle with pair of dorsolateral protuberances. Taxonomic notes are given to distinguish these two new species from closely related species. www.zoobank.org/urn:lsid:zoobank.org:pub:7285F6BC-607D-4F76-B6EE-9CAC67CDE651
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