30 Btillt'tui No. 2j. 



Mallophaga from birds of California, by Vernon L. Kellogg and Bertha 

 L. Chapman. 



The Anatomy of the Mallophaga, by Robert E. Snodgrass. 



This publication is one of the "Occasional Papers of the California 

 Academy of Sciences," this one being No. VI. 



In the tirst part Professor Kellogg has described twenty new species of 

 Mallophaga and in the second part the two authors have jointly described 

 twenty-eight new species. Besides these forty-eight new species, seventy- 

 three previously known ones were found upon the specimens examined. 

 A complete list of the hosts adds value to these admirable studies. The 

 numerous figures of species are well executed and clear. This work, 

 together with the Anatomy of the Mallophaga, by Robert E. Snodgrass, 

 which forms the third part of this paper, is much needed both from an 

 Entomological and Ornithological standpoint. We shall await further 

 studies of the Mallophaga with interest. L, J. 



A Precist' Criterion of Spfcie-s,'^ by (Dr.) C. B. Davenport and J. W. 

 Blankinship, Harvard University. 



In this carefully considered discussion of a most vexing problem, Dr. 

 Davenport has mapped out a method of procedure in the determination 

 of species and varieties which might be profitably adopted by our A. O. 

 U. Committee on Classification and Nomenclature. If a precise criterion 

 of species is among the possibilities, which Dr. Davenport clearly dem- 

 onstrates to be, then it is of the first importance, in the interest of a 

 stable nomenclature, that its adoption should not be postponed. We 

 commend this paper to the careful consideration of those interested in 

 classification. L. J. 



BhUetiyis ^4 (t?id jj;, New Hampshire College, Agriculture Experiment- 

 Station. Hidletin j4. The Winter Food of the Chickadee, by Clarence 

 M. Weed. 



This paper of sixteen pages and eleven figures in the text, is one of a 

 series intended to determine the economic importance of our common 

 birds, and is in line with the work carried on by our national Agricultural 

 Department. Would that every state experiment station might realize 

 the importance of this sort of work and make ample provision for its 

 prosecution. The author's "Conclusion" will illustrate the standing of 

 our Chickadee. "The investigations recorded in this Bulletin, show 

 that the Chickadee is one of the best of the farmer's friends, working 



^Reprint froiu Science. N. S.. Vol. VIII. No. 177. Paj^es 6«5 695. May 20, iSyS. 



