RESUMO Neste trabalho uma nova espécie de afídeo do gênero Lizerius Blanchard, 1923 (Hemiptera: Drepanosiphidae) é descrita. As coletas foram realizadas nos municípios de Porto Ferreira e Pedregulho, estado de São Paulo, Brasil, sobre Persea americana Mill, 1768 e Terminalia brasiliensis Spreng, 1825. As características morfológicas de ápteros e alados são descritas e ilustradas.

ABSTRACT In this study a new aphid species of the genus Lizerius Blanchard, 1923 (Hemiptera: Drepanosiphidae) is described. Samplings were carried out in the municipalities of Porto Ferreira and Pedregulho, state of São Paulo, Brazil, over plants of Persea americana Mill, 1768 and Terminalia brasiliensis Spreng, 1825. Morphological characteristics of apterous and alate are described and represented by drawings.

Greenidea ficicola Takahashi (Hemiptera: Greenideidae) foi coletado pela primeira vez na região Neotropical no município de São Carlos, região sudeste do Brasil. Foram encontradas formas ápteras em Ficus microcarpa L. (Moraceae) em setembro de 2003 e setembro de 2004.

Greenidea ficicola Takahashi (Hemiptera: Greenideidae) is recorded in the Neotropical Region. G. ficicola was collected in the municipality of São Carlos, São Paulo State, Southeastern Brazil. The specimens are apterous forms collected on Ficus microcarpa L. (Moraceae) leaves in September 2003 and September 2004.

Serological techniques were used to study Orphulella punctata (De Geer) predators. For preparation of antiserum, rabbits were immunized by the limphonodule injection method with antigens obtained from O. punctata male. Serological tests were performed using double diffusion in agar gel. Specific serological reactions were obtained 13 days after the 1st inoculation. After the 2nd inoculation 5 precipitation lines were observed. In the reactions with female antigens there were 2-4 lines, while egg antigens showed 2 lines. These variations in the number of lines were attributed to different physiological states and to ontogeny. Positive reactions were observed for spiders and chrysopids captured in the field.