Xylophanes porioni is a moth of the family Sphingidae. It is known from Peru. The length of the forewings is 39–40 mm. It is distinguishable from all other Xylophanes species by the combination of the broad, compact shape of the wings, the suffused brown pattern of the forewing upperside and the arrangement of spots forming the median band of the hindwing upperside. The ground colour of the upperside of the body and forewings is reddish-brown. The forewing upperside is similar in general appearance to that of Xylophanes rufescens, but the pattern of lines and spots is more contrasting. The first postmedian line is diffuse, running to the costa rather than the apex. The second and third postmedian lines are weakly developed, also running to the costa and below the fourth postmedian line it