Cryptic speciation suspected by morphometry within Lutzomyia runoides

Clear-cut variation in the length of genital filaments amongst Bolivian spe cimens of Lutzomyia runoides (Fairchild & Hertig, 1953), of the species gro up aragaoi, allowed us to recognise two different, non-overlapping populati ons living in sympatry. The additional observation of their mutually exclus ive colonisation of isolated trees strongly suggested the existence of cryp tic speciation. Multivariate, size-in and size-free analyses bearing on cha racters other than genital filaments could separate the two putative crypti c species of L. runoides, and showed that they were different From L. infla ta, previously regarded as conspecific. ((C) Academie des sciences / Elsevi er, Paris.)