AN ANNOTATED PRELIMINARY LIST OF THE CHIRONOMIDAE (DIPTERA) OF ZURQUÍ, COSTA RICA Abstract Introduction Author Epler, John H. 461 Tiger Hammock Road, Crawfordville, Florida, 32327, U. S. A. johnepler3@comcast.net text CHIRONOMUS Journal of Chironomidae Research 2017 2017-04-21 30 30 4 18 https://www.ntnu.no/ojs/index.php/chironomus/article/view/2240 journal article 53574 10.5324/cjcr.v0i30.2240 a7fb3be7-8630-47f7-9a0e-4f70eeadf63e 2387-5372 7987298 Riethia - Fifteen male specimens of a genus from the putative tribe Pseudochironomini were collected; this genus is almost certainly Riethia , but there is a small chance they could be Manoa . Males of the two genera cannot at this time be separated utilizing morphological characters; only females and pupae may be separated at the generic level ( Jacobsen & Perry 2002 ; Trivinho-Strixino et al. 2009 ). I’m calling the Zurquí specimens Riethia based on their close resemblance to R. truncatocaudata (Edwards) as redescribed in Trivinho-Strixino et al. (2009) and R. manauara Neubern, Trivinho-Strixino & Silva ( Neubern et al. 2011 ) ; the medial apices of the inferior volsellae of all three species have large, flattened, apically pectinate setae directed mediad (and dorsad in R. truncatocaudata ). Such setae are unknown in Manoa . Note that the legs of the Zurquí specimens are unbanded and there are other differences, especially in the superior volsella; thus, they do not represent R. truncatocaudata . Likewise, differences in the genitalia indicate that R . sp. ZUR-1 is not conspecific with R. manauara .