ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XXVIII. NOVEMBER, 1917. 



No. 9. 



CONTENTS: 



Baker On the Chinese Gall (Aphidi- 



dae Horn.) 385 



Cureau Clouds of Butterflies (Lep. ).. 393 



Tucker Outbreaks of the Elegant 

 Looper (Philtraea elegantaria Hy. 

 Edw. )on Privet in Louisiana( Lep.) 394 



Girault The North American Species 

 of Trigonoderus Westwood, Fe- 

 males (Hymen.) 396 



Crampton A Phylogenetic Study of 

 the Lateral Head, Neck and Pro- 

 thoracic Regions in Some Aptery- 

 gota and Lower Pterygota 398 



Warren Habits of Some Burrowing 

 Scarabaeidae (Col.) 412 



Davidson Early Spring Syrphidae in 

 California and a new Pipiza (Dip.) 414 



Stevens Preliminary List of North 

 Dakota Wasps exclusive of Eu- 

 menidae (Hym.) 419 



Editorial The News for 1918 424 



Holloway Abundance of the Fall 



Web Worm (Lep.) 425 



The Entomological Collections of the 



University of Michigan 425 



Entomological Literature 426 



Review of Hebard : The Blattidae of 

 North America north of the Mexi- 

 can Boundary 430 



Doings of Societies Entom. Section 

 of the Academy of Natural Scien- 

 ces of Phila. ( Hymen., Orth., Lep.) 431 

 The Entomological Society of Nova 



Scotia 431 



Entomological Section of the Lor- 



quin Natural History Club 432 



The Florida Entomological Society 

 and its New Organ 432 



On the Chinese Gall (Aphididae Horn.). 

 By A. C. BAKER, Bureau of Entomology, Washington, D. C. 



(Plate XXVI.) 



The galls produced by an aphid on Rhus scmialata have for 

 many centuries been an important article of commerce in 

 China. They are employed in dyeing and tanning, as well as 

 in native medicines, and the export of these galls in recent 

 years has been valued at about one million d Dllars per annum. 

 The use of these and similar galls would seem of special inter- 

 est at the present time to workers in this country, since gall- 

 nuts are one of the principal ingredients of the so-called secret 

 method of the London seal dyers. Although the galls are well 

 known in commerce, publications on the inse^ : producing them 

 are widely scattered and difficult of access. It seems wise, 

 therefore, to bring the literature together and to compare the 

 insect with its well known relatives in this country. 



385 



