Abstract
While considerable work has been done on the internal larval anatomy of Hymenoptera, Diptera, and Lepidoptera yet, so far, little has been published on the internal larval anatomy of Coleoptera. Recently, workers have demonstrated the value of the internal larval anatomy as a taxonomic tool and as an indicator of phylogenetic relationships. The work that has been done on the comparative internal larval anatomy of sawflies is an example. Yuasa (1932, pp. 120–132) stressed the intrinsic importance of the immature stage in a study of the phylogeny of sawfly larvae. He also recognized the danger of mistaking adaptive structures for phylogenetic indices. Maxwell (1955) had considerable success in using the internal anatomy of sawfly larvae for studying phylogenetic relationships. Moreover, the internal anatomy can be used in determining sawfly larvae to genus and to species as well as to family and subfamily.
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