A review of Copelatus from Cuba, with the description of two new species (Coleoptera: Dytiscidae: Copelatinae) Author Megna, Yoandri S. Departamento de Biología, Universidad de Oriente. Patricio Lumumba s / n, Santiago, Santiago de Cuba, Cuba; e-mail: ysuarez 1976 @ yahoo. es Author Epler, John H. 461 Tiger Hammock Road, Crawfordville, Florida, U. S. A. 32327; e-mail: johnepler 3 @ comcast. net text Acta Entomologica Musei Nationalis Pragae 2012 2012-12-17 52 2 383 410 journal article 10.5281/zenodo.5331014 0374-1036 5331014 Copelatus darlingtoni Young, 1942 ( Figs. 5 , 13, 17 , 30 ) Copelatus darlingtoni Young, 1942: 87 . Copelatus darlingtoni : SPANGLER (1981: 167) , FERNÁNDEZ (2001: 30) , NILSSON (2001: 65) , PECK (2005: 44) . Type locality. Cuba , Pinar del Río Province , Sierra del Rangel. Material examined. HOLOTYPE : J ( MCZ ):‘ Rangel Mts. , P. de R. Aug.24, 1936 , about 1500 ft. [printed] / Cuba 1936, Darlington Collector [printed] / M.C.Z. Type 25902 [printed] / Holotype Copelatus darlingtoni [handwritten, ink]’. PARATYPE : 1 J ( MCZ ): same data as holotype but no red M.C.Z. label [printed] / ‘ Paratype Copelatus darlingtoni Young [handwritten, ink]’. Diagnosis. TL 5.5–5.6 mm ; EW 2.5–2.8 mm ; see Table 1 for remaining body measurements. Male without impressed striae on elytra but with weakly impressed series of punctures ( Fig. 5 ); protibia without ventrobasal emargination ( Fig. 17 ). Females unlike males, with numerous fine, undulating/anastomosing striae on elytra, leaving only front of head, clypeus, and apex of elytra smooth. Copelatus darlingtoni externally differs from C. barbouri , C. insolitus and C. montivagus by the characters given in the identification key and also by the moderately larger ( 1.20–1.25 mm ) aedeagus ( Fig. 12 ). Ecology. All we know about this species is that it was collected in backwaters of small streams, located in highlands ( YOUNG 1942 ). Distribution. Copelatus darlingtoni has been only recorded western parts of Cuba ( YOUNG, 1942 ) ( Fig. 30 ). Remarks. The junior author has dissected the genitalia from the holotype male; they are now in a microvial on the specimen’s pin. No females of this species were examined for this study. Females of C. darlingtoni , C. insolitus and C. montivagus are very similar ( YOUNG 1942 ) and are best separated with comparative material or by association with males.