Triatoma bassolsae sp n. from Mexico with a key to species of "phyllosoma"complex

According to the descriptions of five closely related species of the genus Triatoma Laporte, 1832: T. phyllosoma (Burmeister, 1835), T.pallidipennis ( Stal, 1872), T.picturata Usinger, 1939, T. longipennis Usinger; 1939 and T. mazzottii Usinger; 1941 and further published studies, these species could be included in a "specific complex" named as the species formerly describe d. All these species are typical from Mexico and another species was found in the same country, in the State of Puebla: Triatoma bassolsae sp. n. This species was morphologically compared with the other Jive of the "phyllosom a" complex, including the external male genitalia. The most important chara cters used to separate T. bassolsae from T.phyllosoma (which is the most si milar to the other species) are the morphometric relationships on the head, with a longer anteocular region and a significant longer second rosa al se gment, a long and conspicuous pilosity in different ar-eas of the body and specially on the head, and the characters of the anterolateral, lateral and discal tubercles of the pronotum, very long and sharp in the new species. The male genitalia has several differences between T. bassolsae and T. phyl losoma specially significant on the surface of the endosome process and on the branches of the phallosome support, separated at the apex in the new sp ecies. Types and paratypes are incorporated in the respective institutions in Mexico DF and Rio de Janeiro.