Notes on the subfamily Greenideinae (Hemiptera: Aphididae) from Laos, with descriptions of two new species

Two new species, Eutrichosiphum nasensissp. nov. and Greenidea kheemoticolasp. nov., and two new records, Greenidea eugeniae Takahashi 1941 and Schoutedenia ralumensis Rubsaamen 1905, belonging to the subfamily Greenideinae Baker 1920 are described from Laos. E. nasensissp. nov. is distinguished by unique abdominal pigmentation and the relative length of ultimate rostral segment and 2nd tarsal segment. G. kheemoticolasp. nov. is characterized by the relative length of siphunculus and the maximum width of same segment. Illustrations for above 4 species and identification key to all the species from Laos for apterous viviparous females are provided.