Masch 20, 1914] 



SCIENCE 



441 



these experiments were planned and started by 

 Professor Castle. They were handed over to the 

 writer in the fall of 1909. Crosses were made be- 

 tween rabbits of large and small body size ; the off- 

 spring were crossed back to the parents to produce 

 a back-cross generation. Based upon the statistical 

 study of bone measurements and body weight as 

 estimated from growth curves, it was found that 

 the back-cross was more variable in size than the 

 first generation. This was shown by standard 

 deviations as well as by classifications of the 

 actual measurements in relation to the parents. 

 Certain measurements from the back-cross rabbits 

 reached and exceeded the parental extremes. The 

 means of both generations were very close to the 

 mid-parentals in both generations. All these facts 

 would be expected if the multiple-factor hypothesis 

 be used to construct a mechanism to account for 

 size inheritance. The increased variability would 

 be due to a segregation of size factors. 



Caswell Grave, 



Secretary 

 {To 6e continued) 



THE ENTOMOLOGICAL SOCIETY OF 

 AMEBICA 



The eighth annual meeting of the Entomolog- 

 ical Society of America was held at the Atlanta 

 Medical College, Atlanta, Ga., December 30 and 

 31, in affiliation with the American Association 

 for the Advancement of Science. In the absence 

 of President Bethune, the meetings were presided 

 over by Dr. Philip P. Calvert. The meetings were 

 all well attended, there were about fifty members 

 and fellows in attendance. 



The following papers were presented: 



"The Structure of the Hind Intestine of Cory- 

 dalis," by J. T. Lloyd. 



' ' Observations on the Habits and Life-history 

 of Hydromysa confluens Loew.," by Paul S. 

 Welch. (Bead by title.) 



"New Characters in the Classification of Micro - 

 lepidopterous Larvse," by Stanley B. Fi-acker. 



' ' The Poison Glands of Euproctis clirysorrlwea 

 Linn.," by Cornelia P. Kephart. (Presented by 

 W. A. Riley.) 



"The Tracheation of the Anal Area of the 

 Wings of the Lepidoptera and the Homology of 

 the Veins," by N. L. Partridge. (Read by title.) 



"The Box-elder Bug in Ohio," by Herbert 

 Osbom. 



"The Elytral Tracheation of the Subfamilies 

 and Genera of Cicindelidse, " by V. E. Shelf ord. 



"Some Interesting Structures in the Pup^ of 

 Lepidoptera," by Edna Mosher. 



' ' Some Sources of Error in the Interpretation 

 of Insect Tissue," by W. A. Riley. 



"Conventsia liageni Banks, Life-history Notes 

 and Variations in Wing Venation," by J. S. 

 Houser. 



"Notes on the Head Structures of Thysanop- 

 tera, " by Alvah Peterson. (Read by title.) 



' ' The Desirability of a Biographical Dictionary 

 of Entomologists," by Philip P. Calvert. 



The afternoon of the thirtieth was devoted to a 

 joint session of Section P of the American Asso- 

 ciation for the Advancement of Science and the 

 Entomological Society of America, at which the 

 following papers were presented: 



"Note on the Present Status of the Gipsy Moth 

 Parasites in New England," by L. O. Howard. 



"Some Notes Regarding the Natural History of 

 the Mole Cricket," by E. L. Worsham. 



' ' Notes on Some Old European Collections, ' ' 

 by H. T. Fernald. 



' ' Studies on the Snowy Tree-cricket, (Ecantlms 

 niveus, vrith References to Apple Bark Diseases," 

 by P. J. Parrott, W. 0. Gloyer and B. B. Fulton. 

 (Presented by P. J. Parrott.) 



"Collecting Insects m the Okefenoke Swamp," 

 by J. Chester Bradley. (Presented by J. G. Need- 

 ham.) 



' ' Studies on the Geographical Distribution of 

 Leaf -hoppers. Especially of Maine, ' ' by Herbert 

 Osborn. 



"The Fauna of Epiphytic Bromeliads in Costa 

 Rica," by Philip P. Calvert. 



The morning of the thirty-first was devoted to 

 the presentation of the report of the executive 

 committee, at which was reported the election of 

 fifty-four new members and the election of Dr. C. 

 Gordon Hewitt and Dr. William Barnes as fellows ; 

 the presentation of the reports of standing com- 

 mittees; the election of officers; the adoption of 

 the report of the committee to hold a summer 

 meeting in 1915 on the Pacific coast; the appoint- 

 ment of a committee to consider the desirability 

 of starting the publication of a series of special 

 works on entomology like that of the Ray So- 

 ciety, and the reading of the following papers: 



' ' The Dispersal of Musca domestica, ' ' by James 

 Zetek. (Presented by S. B. Fracker.) 



' ' A Comparison of the Enemies of Toxoptera 

 graminium in South Africa and the United 

 States," by William Moore. (Presented by F. L. 

 Washburn. ) 



