KEY TO THE SPECIES OF RHAGODERA [The elytra have three costae between the sutural costa and the margin. The costa closest to the sutural costa is designated costa 1.] 1. Epipleural fold ending near middle of ventrite IV and replaced thereafter by a thin carina composed of small tubercles (tuberculata group )....................................2 1′. Epipleural fold reaching elytral apex (costata group)...........................................................4 2. Costa 2 contiguous from base to near apex, or if interrupted by short gaps, alignment of intact costal sections is maintained (Fig. 2).......... Rhagodera tuberculata Mannerheim 2′. Costa 2 absent or broadly interrupted in apical third................................................................. 3 3. Costa 2 absent (disjunct tubercles present in non-linear formation) except for short ridge on distal 1/5 of elytron (Fig. 4); subantennal groove present......................................................... Rhagodera co s taefragmenta Krinsky, new species 3′. Costa 2 contiguous for 2/3 of length followed by a broad interruption before apical portion of costa (Fig. 3); subantennal groove absent........................... Rhagodera interrupta Stephan 4. Pronotum with lateral margin sinuate before distinct hind angle; small, round prominence present between discal costa and lateral margin. Junction of elytral costae 1 and 2 near apex noticeably raised, higher than either costa. Arizona............... Rhagodera costata Horn 4′. Pronotum with lateral margins evenly rounded, hind angles indistinct; prominence between discal costa and lateral margin absent. Junction of elytral costae 1 and 2 near apex not noticeably raised. Texas.............................................................. Rhagodera texana Stephan

Published as part of Krinsky, William L., 2015, A New Species ofRhagoderaMannerheim (Coleoptera: Zopheridae: Colydiinae) from San Clemente Island, California, pp. 293-296 in The Coleopterists Bulletin 69 (2) on page 295, DOI: 10.1649/0010-065x-69.2.293, http://zenodo.org/record/10104861