Colopha ulmicola 60 



color of adults 32, 33, 34 



color of larvae 19, 27 



Commelinaceae 313 



Conophyllis americana 276 



Conopidae 14 



Convolvulaceae 329 



Copestylum marginatum 67, 68 



Coquillett, cited 12 



Coralorhiza odontorrhiza 295 



Cornaceae 334 



Cornus alternifolia 269, 274 



Corrigiolaceae 320 



corn 25, 27, 30, 38 



Corylus americana 294 



cotton 48, 64 



cow-dung 67, 72 



Crassulaceae 323 



Criopi'ora 39 



cyanogaster 96 



Criorhina analis 96 



decora 97 



intersistens 97 



pictipes 97 



umbratilis 97 



Criorhina 16, 39 



oxyacanthae 73 



Cruciferae 55 



Cryptoglena 385 



Cucurbitaceae 327 



Cunilla originoides 280 



Cuscutaceae 329 



Cyclorrhapha 13 



Cynorhina 96 



Cynoxylon (Cornus) florida.. 274, 280 

 Cyperaceae 309 



Daecke, cited 72 



Dasystoma laevigata 280 



Davis, G. C, cited 50 



DeGerts, cited 65 



Dentaria heterophylla 275 



laciniata 275 



Didea 39 



fasciata 22, 26, 27, 43, 45, 57, 58, 66 



fasciata fuscipes 85 



intermedia 66 



Dinema 425 



Dioscoreaceae 314 



Diospyros virginiana L 58, 294 



Dipsacaceae 335 



Distigma 406 



dock, broad loaf 54 



curled 56, 58 



dorsal spiracular spine 19 



Dryopteris margunale 



266, 269, 275, 290, 293 



spinulosum 266, 269, 275, 290, 293 



Dufour, Leon, cited 67 



duration in egg stage 16 



Dury, Charles, cited 13, 80, 89, 92 



Ebenaceae 329 



Ecological Relations of Adult 



Syrphidae 48 



Economic Aspects, Sugar Grove.. 296 

 Economic Importance of Adult 



Syrphidae 48 



of Larvae of Syrphidae 42 



Egg of Syrphidae 16 



elm 60, 67 



emergence of adult 31 



Encyrtus mesograptae 51 



Enemies of Syrphidae 50 



Entosiphon 423 



Epigaea repens 278, 280, 292, 299 



Equisetaceae 307 



Equiseteae 307 



Ericaceae 328 



Eristalis 16, 17, 28, 30, 31, 39 



aeneus 15, 61, 63 



larvae of 24, 69, 91 



albifrons 91 



arbustorum 69 



bastardii 91 



dimidiatus 47, 91 



flavipes 35, 37, 91 



hirtus 70 



latifrons 91 



meigenii 91 



saxorum 91 



temporalis 70 



tenax 15, 17, 34, 36, 



47, 48, 49, 61, 68, 69, 70, 92 



transversus 92 



vinetorum 48, 91 



Eristalis, larvae of 27 



posterior respiratory appen- 

 dage of 21 



Eristalinae 14, 35 



Eristhronium americanum 275 



Erne, cited 37 



Euglena 357 



Euglenoidina of Ohio 343 



Index 447 



Euglenopsis 408 



Eumerus 39, 40, 63 



strigatus 74 



Eupeodes volucris 65 



Euphorgiaceae 318 



Eurycles 72 



Eusporangiatae 306 



Eutreptia 401 



Evolutionary Table of Larval 



Habits of Syrphidae 38 



Fabaceae 322 



Fabricius 12 



453 



