A DESCRIPTION OF AMBLYOMMA-TIGRINUM KOCH, A-NEUMANNI RIBAGA, AND A-TESTUDINIS (CONIL) IMMATURES (ACARINA, IXODIDAE)

The immatures of Amblyomma tigrinum Koch and A. neumanni Ribaga, as we ll as the larvae of A. testudinis (Conil) are described from specimens reared in a laboratory. A. tigrinum nymphs display a palpal morpholog y typical of a relatively primitive Amblyomma, together with large spu rs on the gnathosoma. On the other hand, A. neumanni nymphs are unique among Amblyomma in having palpal segment IV deeply imbedded in the ve ntro-internal portion of segment IH. Finally, the morphology of larval A. testudinis relegates the species to a primitive position in the ge nus.