In 1935 , he made an expedition to the Balkan Mountains and the Rhodope Mountains in South - Eastern Europe .
In 1934 , Heinrich published his first major work , Die Ichneumoninae von Celebes ( 1934 ) .
In 1935 , Heinrich made an expedition to the Balkan Mountains and the Rhodope Mountains in South - Eastern Europe .
In 1934 , Heinrich published his first major work , Die Ichneumoninae von Celebes ( 1934 ) .