The egg and five nymphal stages, of the Neotropical species Martarega lofoides are described and illustrated for the first time. The immature stages are very similar, differing mainly in the body length, width of the body, head and pronotum, degree of wing pads development, synthlipsis width, and pattern of setae on the ventral abdomen. Adults and nymphs used in this study were collected from t...

The ultrastructural morphology of the ventral region of the head (rostrum and buccula) and proesternum (stridulatory sulcus) of nymphs from the 1st to 5th instars of Triatoma guazu Lent & Wygodzinsky, 1979 and Triatoma jurbergi Carcavallo, Galvão & Lent, 1998 was described. Morphological differences between the two species and of the five nymphal stages development of each species were observed...

Although Panstrongylus lutzi (Neiva and Pinto) is currently the fifth most frequent species of Triatominae captured in artificial structures in Brazil, its silvatic habitat remains unknown. A survey of its natural ecotopes was performed in an area of Bahia State. P. lutzi nymphal instars and adults were detected in burrows of Dasypodidae. Silvatic habitat of four other endemic triatomine specie...

Borrelia burgdorferi, the etiologic agent of Lyme disease, and Babesia microti, the causative agent of human babesiosis, were isolated from 71 and 57%, respectively, of 14 specimens of Peromyscus leucopus and Microtus pennsylvanicus collected from Prudence and Patience Islands, R.I. Both pathogens were isolated from five individual rodents. The presence of these two infectious organisms in the ...

The antibiotic streptomycin added to the drinking water at a concentration of 125 mg/ l during nymphal development of Nezara viridula (L.) (Heteroptera: Pentatomidae)accelerated the development in ca. 2 days, increased survivorship, and doubled adult longevity; nymph survivorship and adult body weight were not affected when compared to control insects. Streptomycin has potential in rearing N. v...