Attempt deals with rearing of Black Soldier Fly (BSF), Hermetia illucens (L) through the use of poultry feed fortified with the extractives of Chlorella pyrinoidosa (Chick) and Scenedesmus dimorphus (Turpin). The weight of larval stages of Black Soldier Fly (BSF), Hermetia illucens (L) of the control group was 321.32 (±42.786) units. Treating the poultry feed with the extractives (10 PPM, 25 PPM, 50 PPM, 75 PPM and 100 PPM) of Chlorella pyrinoidosa (Chick) or the extractives (10 PPM, 25 PPM, 50 PPM, 75 PPM and 100 PPM) of Scenedesmus dimorphus (Turpin) was resulted in significant increase in the body weight of larval stages of Black Soldier Fly (BSF), Hermetia illucens (L). The soluble protein and total protein contents (µg/mg body weight) of larval stages of Black Soldier Fly (BSF), Hermetia illucens (L) of the control group were 166.87 (±29.828) and 118.68 (±23.394) units, respectively. Treating the poultry feed with the extractives (10 PPM, 25 PPM, 50 PPM, 75 PPM and 100 PPM) of Chlorella pyrinoidosa (Chick) or the extractives (10 PPM, 25 PPM, 50 PPM, 75 PPM and 100 PPM) of Scenedesmus dimorphus (Turpin) was found resulted into significant increase soluble protein contents and total protein contents in the body of larval stages of Black Soldier Fly (BSF), Hermetia illucens (L). The BSF diet with supplementation of extractives of Chlorella pyrinoidosa (Chick) and Scenedesmus dimorphus (Turpin) at certain concentration (10 PPM to 100 PPM) exerts influence in weight and protein contents in Black Soldier Fly (BSF), Hermetia illucens (L).