INDEX TO PART I. 



PAGE 



Abdomen 6, 7 



Aphidinte 31 



Aphidini 42 



Aphid Theme 10, 11 



Aphis ( genus) . 43 



Aphis, sp 47, 49, 50, 58, 62 



aubletia 48 



brassicse 54 



cardui 55 



cerasif oliee . 59 



cratfegifolia 53 



gossypii 56, 63 



maidis 58 



nerii 51 



rumicis 47 



ribis 46 



sambuci. . 60 



sambucifolia. 52 



vernonia 57 



vitis 56 



Calaphis (genus) 33 



Callipterini 32 



Callipterus ( genus) . 33 



Callipterus, sp ? 40, 41 



bellus 40 



asclepiadis. 39 



genevei 38 



Chaitophorus ( genus) 32 



Chaitophorus, sp ■? 34 



flabellus 37 



negundinis 35 



populicola 36 



stevensis 36 



Chermaphinse 14 



Chermaphis (genus) 15 



Cladobius (genus). 32 



Colopha (genus) 24 



Color Key 9 



Cryptosiphum (genus) 33 



Drepanosiphum ( genus) 34 



acerifolii 45 



Forda (genus) 13 



Qeoica (genus) 17 



Head 4, 6 



Hormaphis ( genus) 17 



Hyalopterus ( genus) 42 



Introduction. 4 



Lachninee 29 



Lachuus ( genus) 29 



longistigma 30 



Macrosiphum ( genus) 66 



Macrosiphum,sp?....71, 72, 73, 75, 76, 78, 80 



ambrosise 74 



Macrosiphum, sp 1 page 



chrysanthemi 73 



erigeronensis 76 



persicee. 68 



pisi 79 



squarrosa 77 



Mastopoda (genus) 43 



Measure Key 10 



Myzus ( genus) 67 



achyrantes 70 



biennis 78 



cerasi 68 



prunifoliae 69 



Monellia ( genus) 33 



Mouth parts 5, 6 



Nectarosiphum (genus) 67 



Pemphiginee.. 16, 17 



Pemphigus ( genus) 18 



burrowi 18 



fraxinifolii 19 



populicaulis.. 20,21 



populitransversus 22 



Phorodon (genus) 67 



Phorodon sp? 81 



Phyllaphis ( genus).. 30 



Phylloxera (genus) .. 14,15 



carysecaulis 15 



Preface 3 



Pulvius, probosceus 14 



Rhizobiinse 12, 13 



Rhizobius (genus) 13 



Rhopalosiphum (genus) 44 



dianthi 66 



rois 65 



violae 64 



Schizoneura (genus) ' 25 



Schizoneura spl 28 



americana 25 



corni 27 



lanigera 26, 27 



Schizoneurinae 24 



Sipha ( genus).. 43 



rubifolii 44 



Siphocoryne ( genus) 43 



avense 61 



Subfamilies.. 12 



Technique 8, 9 



Tetraneura (genus).. 17 



ulmi 23 



Thorax 7, 8 



Toxoptera (genus) 24 



Trama (genus) 13 



Tychea ( genus) 13 



Wax glands 11, 12 



4*-Bnll., Vol. Ill, No. 8. 



(275) 



