Index 



Cotyledon, 408, 430-431. 



edwardsii, 408, 410. 

 Crataegus oxyacantha (English haw- 

 thorn), host for Aphis pomi, 341. 

 Cvcloneda sanguinea, 252, 288-292, 



293, 297, 298. 

 Cyrtomium falcatum (holly fern), 



host for Idiopterns, 329. 

 Dacerla inflata, 239. 

 Deltocephalus vanduzei, 249. 



punetatus, 249. 

 Deraeocoris fratemus, 238. 



ingens, 237, 238. 

 Dermestes, 128. 

 Dichrooscytus elegans, 237. 

 irroratus, 236. 

 speciosus, 236. 

 suspectus, 236. 

 Dicraneura carneola, 249. 

 Dicyphus agilis, 240. 

 californieus, 240. 

 crudus, 240. 

 vestitus, 240. 

 Diploptera, 115. 



Dipsacus fullonum (fuller's teasel), 



host for Macrosiphum rosae, 329, 



and for Ehopalosiphuni persicae, 



332. 



Diptera (flies), venation in wings of, 



130-134. 

 Drepanaphis acerifolii, 321-322. 

 Drepanosiphum platanoides, 321. 

 Duzee, E. P. Van, 199-216, 217-227, 



229-249. 

 Ectopiocerus anthracinus, 235. 

 Elevator muscles, in flight of insect, 



34. 

 Elidiptera pallida, 246. 

 septentrionalis, 245, 246. 

 variegata, 246. 

 woodworthi, 245. 

 Elymiis (^-ild lye), host for Macro- 

 siphum granarium, 328. 

 Elytroptera, venation in wings of, 



113-129. 

 Embiidae, venation in wings of, 106- 



107. 

 Empoa commissuralis, 249. 

 Encyrtinae, new genera and species 



'of, 347-367. 

 Ephemeridae (mavflies), venation in 



wings of, 98-101. 

 Ephydra californica, 157. 

 cinerea, 159-160. 

 gracilis, 157. 

 halophila, 157. 

 liians, 159. 

 millbrae, 155-159. 

 Ephydridae, study of, 153-198; bibli- 

 ography of, 161-168; catalogue, 

 synopses, key to subfamilies and 

 to genera of, 168-198; in Tahoe 

 region, 230. 



Epilobium adenocaulon occideutale, 

 host for Aphis oenotherae, 341. 



Eriodyetion crassifolium (Yerba 

 santa), 429. 



Eriosoma, 345. 



lanigera, 345, 346. 



Errhomenellus maculatus, 248. 



Escallonia pulverulenta, host for 

 Rhopalosiphum persicae, 332. 



Eschna. See Aeschna. 



Essig, E. O., 301-346. 



Eucallipterus flavus, 323. 

 tiliae, 323. 



Euceraphis betulae, 322-323. 



Eugerion, 123. 



Eugeron, 111. 



Eugnathodus abdominalis, 249. 



Euparagia, wing of, 373, 374, 378; 

 mouth parts of, 377; antennae 

 of, 377; simple claws of, 378; 

 male genitalia, of, 378; genus, 

 383-384. 

 maculiceps, 384. 

 scutillaris, type species of, 385. 



Euparagiinae, key for genera of, 381- 

 382 ; description of, 383. 



Euphyllura arbuticola, 249. 

 nevadensis, 249. 



Eurygaster alternatus, 231. 



Euscelis exitiosus, 249. 

 striolus, 249. 



Evening primrose, host for Aphis 

 oenotherae, 341. 



Fagus tricolor, host for Phyllaphis 

 fagi, 321. 



Fallen Leaf Lake, California, collec- 

 tion of insects from, 229, 230. 



Flight, of insects, different from that 

 of birds, 21, 22; motion of wing 

 in, 23—25; air pressure, factor in, 

 25; mng muscles in, 26; bobbing 

 motion in, 28 ; function of air 

 sacs, 29, 30, of elevator muscles, 

 34. 



Forficulidae (earwigs), 116-119. 



Fulgorina, 123. 



Gayella, 370. 



Gegenbaur, theory of, in wing genesis, 

 6, 7, 8, 14. 



Geocoris pallens decoratus, 234. 



Gerarina, venation in wings of, 103- 

 104. 



Gerhardiella delicata, 243. 



Gerris gilletei, 235. 

 orba, 23,5. 



Gypona angnlata, 248. 



Hadronema militaris, 241. 

 robusta, 241. 



Harmostes reflexulus, 231. 



Hawaiian Sugar Planters' Experiment 

 Station, 347. 



Hedera helix (English ivy), host for 

 Aphis hederae, 339. 



[467] 



