22 LIST OF CONTRIBUTORS. 



Coates, Benjamin H. Continued. 



Seventeen-year locust. P '43, 277 



Correction of an error in Dr. Smyth's work on the unity 



of the human races. P '52, 189 



On effects of chloroform inhalation. P '58, Biol. 11 



Description of a hydrostatic balance, by which the specific 



gravities of minerals may be ascertained without calculation, 

 j i, 368 

 Coates, Reynell. Remarks on the floating apparatus, and other 

 peculiarities, of the genus Jauthina. j iv, 356 



Remarks on the pedunculated cirrhi pedes with a descrip- 

 tion of two new species of the genus Otion. j vi, 130 



Cockerell, T. D. A. A supplementary note to Mr. Johnson's 

 list of Jamaican Diptera. P '94, 419 



Some new bees of the genus Perdita. P '95, 11 



The bees of the genus Perdita F. Smith. P '96, 25 



New and little-known North American bees. P '97, 334 



New and little-known bees from Washington State. P '98, 50 



Some notes on Coccidae. P '99, 259 



Descriptions of new bees collected by Mr. 11. 11. Smith in 



Brazil. I, P 1900, 356 ; II, '01, 216 



The classification of the Aleyrodidse. P '02, 279 



Bees of the genus Nomada from California. P '03, 559 



<- North American bees of the genus Nomada. P '03, 580 



Variation of the snail-genus Ashmunella. P '03, 615 



The roses of Pecos, New Mexico. P '04, 108 



See Barber, C. M., and T. D. A. Cockerell 



- See Pilsbry, II. A., and T. D. A. Cockerell 



See Behn, James A. G., and T. I). A. Cockerell 



Cockerell, T. D. A. and Wm. J. Fox. New fossorial Hymenoptera 



from New Mexico. P '97, 135 

 Cockerell, T. D. A. and Wilmatte Porter. A new crayfish 



from New Mexico. P 1900, 434 

 Colton, Harold Sellers. How Fulgur and Sycotypus eat 



oysters, mussels and clams. P '08. 3 



Some effects of environment on the growth of Lymnsea colu- 

 mella Say. P '08, 410 



Modiolaria mannorata and the surface film. P '10, 42 



Conklin, Edwin G. Environmental and sexual dimorphism in 



Crepidula. P '98, 435 

 The cause of inverse symmetry. P '03, 753 



