The Determination of Characters at Metamorphosis in Rhodnius Prolixus (Hemiptera)

Hormone Balance and the Control of Metamorphosis in Rhodnius Prolixus (hemiptera)

The body cells of the developing insect carry the potentialities for both larval and imaginal differentiation. During larval life imaginal differentiation is suppressed because in the presence of the juvenile hormone (sometimes referred to as the 'inhibitory hormone'), secreted by the corpus allatum, the intracellular system which leads to the formation of larval structures takes precedence ove...

The Role of the Epidermal Cells in the 'migration' of Tracheoles in Rhodnius Prolixus (hemiptera)

During the moulting process the tracheal system grows by the extension of new tracheae and tracheoles from the existing tubes. Outgrowths are produced by the active movements of the formative cells of the tracheal epithelium; these give out filiform 'amoeboid* processes which move into those regions most deficient in oxygen (Wigglesworth, 1954). Changes in the distribution of the tracheae can t...

The function of the Corpus Allatum in the Growth and Reproduction of Rhodnius prolixus ( Hemiptera )

R H O D N I U S . . . . . . . . . . 95 i. F u r t h e r E v i d e n c e of t h e Corpus A l l a t u m p r o d u c i n g t h e Moul t i ng H o r m o n e . . . . . . . . . 95 ii. Corpus A l l a t u m as t h e Source of t h e ' I n h i b i t o r y H o r m o n e ' . 97 iii. T r a n s p l a n t a t i o n of t h e Corpus A l l a t u m . . . . 98 iv . S u b s e q u e n t D e v e l o p m e n t o f ' 6 ...

The Role of the Haemocytes in the Growth and Moulting of an Insect, Rhodnius Prolixus (hemiptera)

The Effect of Colchicine on Myogenesis in Vivo in Rana Pipiens and Rhodnius Prolixus (hemiptera)

The effect of colchicine on myogenesis in vivo has been studied in the regenerating tadpole tail of the frog, Rana pipiens, and in the abdominal molting muscles of a blood-sucking bug, Rhodnius prolixus Stål. Colchicine is shown to disrupt microtubules in the differentiating muscle cells of both these organisms. The disruption of microtubules is correlated with a loss of longitudinal anisometry...