6l2 



SUBJIJCT INDEX 



Electrical Engineering. *Leakage resis- 

 tance of street railway roadbeds 

 and its relation to electrolysis of 

 underground structures. E. R. 

 Shepard. 469. 



Electricity, flonization and resonance 



I potentials for electrons in vapors 



\ of lead and calcium. F. L. MohlER, 



Paul D. Foote and H. F. Stim- 



SON. 179, *324. 



Engineering. fAircraft engines, cooling 



radiators for. S. R. Parsons. 478. 



*Conservation through engineering. 

 Franklin K. Lane. 273. 



*Electrical measurements, the accu- 

 racy of commercial. H. B. Brooks. 

 300. 



fGas-engine cylinders, velocity of 

 flame propagation in. D. Mac- 

 kenzie. 477. 

 Entomology. fAmerican tropics, collect- 

 ing in. William Schaus. 445. 



*Ants of Borneo. W. M. WheelER. 

 110. 



*Ants of British Solomon Islands. 

 W. M. Mann. 298. 



*Ants of Cocos Island. W. M. 

 Wheeler. 22. 



*Ants of Galapagos Islands. W. M. 

 Wheeler. 23. 



*Asaphidion (Coleoptera-Carabidae) 

 two new species of, from North 

 America. H. F. Wickham. 110. 



fBlack grain-stem sawfly of Europe 

 in the United States. A. B. Gahan. 

 277. 



fBreeding and rearing insects, sym- 

 posium on laboratory methods of. 

 J. A. Hyslop, F. C. Craighead, 

 E. R. Selkregg, R. A.^ CuspMAN, 

 S. A. Rohwer, a. L. Quaintance. 

 528. 



Butterflies, two new species from 

 Tropical America. William 



Schaus. 434. 



fCarabidae from Alaska, two new. 

 H. F. Wickham. 279. 



Ceropales Latreille (Hymenoptera), 

 the generic name. S. A. Rohwer. 

 171. 



fCicada, biological and anatomical 

 notes on. R. E. Snodgrass. 447. 



fCicada, periodical. R. A. St. 

 George. 447. 



fCoccidae, brief resume of the family. 

 E. R. Sasscer. 446. 



*Com-borer, European (Pyratista nti- 

 bilis) and its nearest American 

 allies, note on. Carl Heinrich. 

 298. 



fDetidrocinus in semitropical Florida. 

 E. A. Schwartz. 278. 



tEntomologists, on. L. O. Howard. 

 280. 



Harris collection of sawflies and the 

 species described by Harris. S. A. 

 Rohwer. 508. 



fHymenopterous parasites, laboratory 

 methods of breeding and rearing. 

 R. A. Cushman. 529. 



jlnsectaries. S. A. Rohwer. 529. 



tLead cable borer. Thomas E. Sny- 

 der. 580. 



jLepidoptera, fruit-infesting, labora- 

 tory methods of breeding and 

 rearing. E. R. Selkregg. 529. 



tLice in clothing, experiments with 

 steam disinfection in destroying. 

 R. H. Hutchinson. 278. 



*Opius (Hymenoptera-Braconidae) 

 description of new species of. A. 

 B. Gahan. 110. 



fOrthoptera, the olfactory sense in. 

 N. E. McIndoo. 527. 



fPanama, notes on insect fauna of. 

 Harry F. Dietz. 279. 



Phyllotreta, new species of. F. H. 

 Chittenden. 389. 



*Ptimdae, description of new North 

 American, with notes on Japanese 

 species. W. S. FiSHER. 110. 



*Pyrausta nubilis (European corn- 

 borer) and its nearest American 

 allies. Carl Heinrich. 298. 



