The new species Pennasolis opitzi n. sp., Cymatodera ignava n. sp. and C. tlahuica n. sp. are described from the Reserva de la Biosfera Sierra de Huautla in Morelos, Mexico.
Nineteen new species of Cymatodera Gray are described: C. mexicana, C. cicatricula, C. matehualacaligoides, C. brailovskyi, C. durangoensis, C. monticola, C. paucipunctata, C. anulata, C. christina, C. copei, C. oxchuc, C. merickeli, C. romeroi, C. cellulosa, and C. acutipennis from México; C. doda from México, Nicaragua and Costa Rica; C. carinipennis from México and Guatemala; C. rileyi from México, Honduras, and Belize, and C. wilsoni from Costa Rica. These species are figured, along with the type of C. kolbei Schenkling, and a lectotype is designated for the latter. I include a brief discussion on the prevalence and evolution of brachyptery in Cymatodera.
Six new species of Enoclerus are described: E. delusus n. sp. from Costa Rica and Panamá, E. incanus n. sp. from México, E. zip n. sp. from México and El Salvador, E. reductesignatus n. sp. from Panamá, and E. citrinifrons n. sp. and E. philogenes n. sp. from Costa Rica. The new species are hypothesized to participate in a Batesian mimicry complex with boldly marked diurnal mutillid wasps as their model. Enoclerus crabronarius var. deletus Wolcott is elevated to species rank as E. deletus Wolcott new status. The identity of E. crabronarius is discussed.
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