ECOLOGICAL STUDY OF AQUATIC MIDGES AND SOME 

 RELATED INSECTS WITH SPECIAL REFERENCE TO 

 FEEDING HABITS. 



By ADELBERT L. LEATHERS. 

 J* 

 CONTENTS. 



Page. 



Chironomida? 2 



Introduction 2 



Technique 3 



Structure and function of head of Chironomus brasenice with reference to feeding habits 6 



Subfamily Chironomins 9 



Group I. — Chironomus lobiferus Say , 9 



Habitat 9 



Uses made of silk n 



Method of spinning silk _ 13 



Silk structures 15 



Related forms 16 



Group II. — Tanytarsus pusio Meigen 17 



Construction of tube 17 



Variations in tubes 18 



The net 18 



Net making 18 



Silk spinning 19 



Adaptability 19 



Group III. — Chironomus cayugcB Johannsen 20 



Habitat • 20 



The burrow 21 



Feeding habits 22 



Group IV. — Chironomus brasenur, n. sp., a leaf-eating chironomid , 23 



Introduction 23 



General habits 24 



Life history 24 



Penetrating the epidermis 26 



The burrow 27 



Respiration. .. ..• 28 



Feeding habits 28 



Economic importance 29 



Control 29 



Description of Chironomus braseniee, n. sp 30 



Larva 3° 



Pupa 3° 



Male 30 



Female 31 



Group V. — Trichocladius nitidellus Malloch 31 



Feeding habits : 31 



The burrow 32 



