It is similar to Agrius convolvuli, but there is slight sexual dimorphism (the forewing of the female is paler than that of the male), the lateral abdominal spots are buff (not pink) and the hindwing upperside pale bands are buff (not grey).
This passage describes a species that is similar to Agrius convolvuli but has distinct features, including the female's forewing being paler, lateral abdominal spots being brown instead of pink, and the upperside pale bands on the hindwing being buff rather than grey.