. 
~ENTOMOLOGICAL NEWS 
0c ZEDINGS OF THE ENTOMOLOGICAL SECTION 
eidiey OF NATURAL SCIENCES, PHILADELPHIA. 
OCTOBER, 1908. No. 8 
CONTENTS: 
‘en Johnson and Rohwer—Colorado Bem- 
Sdddetesenscusece SOG |. WEEORO ccccnccccecccocnseseceetsane 373 
—Synopsis and Bibliography 
of California Siphonaptera......... 
aah bbe osededess a3 caer ards ol the be of " 
ay deepen yo | Falter... ee ae 
iin tee ee 
FERRER RR een ee ws Doings Of Societies ooccccedcccecsésces 
Obituary— Prof. Paul Biolley .......... 
Bevecccrcsccceces as Simon H. M. eedesovece 3 
Monsieur P. A. P. Finot.... 396 
Wesee* cossccecose ys Prof. Gustav Mayr......... 3% 
A New Cecidomyiid on Oak. 
: By H. M. Russett anv C. W. Hooxer, 
_ Massachusetts Agricultural College, Amherst, Mass. 
(Plate XIV) 
P Th insect was discovered by Mr. W. V. Tower, in July, 
cu , 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 
= _ @ 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, 
ish = Mr. E. P. Felt kindly determined as a new species. The 
: gall which it forms has been described by Osten Sacken as C. 
aa erubescens.* 
____ This species of gallfly is very abundant on a black oak (Quer- 
€$ coccinae 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 
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