CONTENTS 



D. Two-Winged Flies [Diptera) 



23. The Harlequin-Fly ( Ckironomus) 



24. ( Practical. ) The Development of an Insect ( Chironomus 



25. Gnats (Culex) ..... 



26. The Cx3.ne-Y\y (Tipula oleracea and allied species) . 



27. The Hessian-Fly (Cecidomyia destructor) 



28. (Practical.) The Structure of the Blow- Fly [Calliphora 



erythrocephala or C. vomitoria) 



29. The Bot-Fly of the Horse (GastropMlus equi) 



30. The Warble-Fly (Hypoderma bovis) . 



3i' 



E. Aphids and Scale-Insects (Hemiptera) 

 (a) The Turnip Aphis {Rhopalosiphum dianthi) 



(b) The Woolly Aphis [Schizoneura lanigera) 



{c) The Fhylloxera. oi the Wine {FAylloxera vastatrix) 



32. The Mussel-Scale of the Apple-Tree {Mytilaspis pomorum) 



F. Common Insects of other Orders 



33. Caddis- Worms and Caddis-Flies ( Trichoptera) 



34. May-Flies (Ephemerida) . . . . . 



35. Dragon-Flies (Odonaia) . . . . . 



36. Three Common Orthopterous Insects 



PAGE 



110-121 

 122-125 

 125-129 

 129-132 

 133-136 



136-144 

 144-149 

 149-152 



153-162 

 162-165 



166-168 

 168-171 

 171-175 

 175-181 



PART III 



DESCRIPTIVE ACCOUNT OF THE LARGER ORDERS 

 OF INSECTS, WITH SHORT NOTICES OF RE- 

 MARKABLE FORMS 



PART IV 



THE DESTRUCTION OR MITIGATION OF 

 INSECT-PESTS 



The Gipsy-Moth in Massachusetts .... 



The Fluted Scale in California ..... 

 Remedies for Injurious Insects ..... 

 The Value of Expert Knowledge .... 



238-243 

 243-245 

 245-251 

 251-252 



Index 



253-256 



