Newly emerged honey bees were fed diets containing 5% protein in the form of dandelion pollen, egg albumin, soybean meal hydrolysate or casein for 7 days, after which the recta were removed and the nitrogenous excretory products determined in the fecal material. Bees fed pollen showed the following as percentage of total nitrogen: uric acid, 62.06; creatine, 1.5; creatinine, 1.47; amino nitrogen, 6.11; urea, 0; and ammonia, 0. Amino nitrogen showed a direct relationship to diet adequacy: 1.36 and 6.11% for the negative controls and pollen-fed groups, respectively. No consistent pattern was noted for creatine or creatinine, except that both were lower for the pollen-fed groups than for the negative controls. When dietary protein sources were arranged in order of decreasing adequacy based on pharyngeal gland development, uric acid excretion varied inversely with diet adequacy; pollen, 48 (percentage of total nitrogen excreted); egg albumin, 62; soy hydrolysate, 62; casein, 96; and negative control, 96.