ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XIX. 



OCTOBER, 1908. 



No. 8. 



CONTENTS: 



Russell and Hooker A new Cecido- 



myiid on Oak 349 



Mitzmain Insect Transmission of Bu- 

 bonic Plague : a study of the San 

 Francisco Epidemic 353 



Sherman Notes on Tiger Beetles and 



Klevations 360 



Brues The occurrence of the Remark- 

 able Braconid genus Helorimorpha 

 in America 363 



Howard Upon the Aphis-feeding spe- 

 cies of Aphelinus 365 



Durv An interesting new Agrilus from 

 Cincinnati. Ohio 368 



Porter A List of Local Lepidoptera 

 found at Decorah, Iowa 369 



Johnson and Rohwer Colorado Bem- 



bicidae 373 



Mil/main Synopsis and Bibliography 



of California Siphonaptera 380 



Davis Standards of the number of 



eggs laid by Insects VII 383 



Editorial 384 



Entomological Literature 385 



Notes and News 386 



Doings of Societies 389 



Obituary Prof. Paul Biolley 394 



Simon H. M. Seib 396 



Monsieur P. A. P. Finot.... 396 

 Prof. Gustav Mayr 396 



A New Cecidomyiid on Oak. 



BY H. M. RUSSELL AND C. W. HOOKER, 

 Massachusetts Agricultural College, Amherst, Mass. 



(Plate XIV) 



This insect was discovered by Mr. W. V. Tower, in July, 

 1905, working on the leaves of a black oak. He began observa- 

 tion on its life history but was called away and the work was 

 taken up by Mr. H. M. Russell. Mr. Russell had practically 

 finished, except for describing the adult, when he left to take 

 a position with the U. S. Department of Agriculture and the 

 subject was placed in my hands to complete. In addition to 

 verifying Mr. Russell's observations, I have described the adult, 

 which Mr. E. P. Felt kindly determined as a new species. The 

 gall which it forms has been described by Osten Sacken as C. 

 crubescens.* 



This species of gallfly is very abundant on a black oak ( (Jitcr- 

 cus coccinac var. tinctoria group) growing near the Presi- 

 dent's house on the college grounds. This oak is in a small 

 clump of red oaks, none of which have become infested; this 

 seems to indicate that this Cecidomyia will feed only on black 



*Mon. N. A. Dipt. I, p. 200, n. 20, 1862, "Folded margin of an 

 oak leaf, tinged with red. This deformation seems to resemble that 

 of C. quercus Lw. on the European oaks. Occurs in the spring." 



349 



