THE LARVA OF LEPTOHYLEMYIA COARCTATA. 



123 



larva. This demonstrates the existence in this insect of development with almost 

 obliterated trimorphism, such as characterises carnivorous Anthomyid larvae. 



We may therefore conclude from (1) the structure of the mouth-parts, (2) the shape 

 of the posterior end of the abdomen, and (3) the structure of the posterior spiracles, 



Fig. 2. Mouth-parts of a full-grown larva of Leptohylemyia coarctata. 



that the primary larva found by Kurdjumov does not belong to the developmental 

 cycle of Leptohylemyia coarctata, Fall. On the other hand it is quite easy to suppose 

 that the two eggs found by Kurdjumov in his breeding vessel were brought in with 

 the earth from outside. 



(C394) 



a2 



