part of larval hindgut larval Malpighian tubules Five Malpighian tubules open into the alimentary canal behind the stomach. The run forwards from position, usually to the 5th or 6th abdominal segment, then reverse their direction and end blindly near the posterior end of the abdomen. Larval alimentary canal and salivary glands in ISBN:0-937548-00-6. TGMA:0001705 TGMA:0001705 default_namespace