242 ENTOMOLOGICAL NEWS [June, 'll 



spot dusky and feebl}' transparent, their rib-vein black, and their third 

 oblique vein abortive nearly or quite to the fork. It is 0.16 long to the 

 tip of its wings. I find no woolly aphis mentioned by European authors 

 as infesting the oak, except the Eriosoma quercus of Sir Oswald 

 Mosley (Gardener's Chronicle, i. 828), which, in the List of Homop- 

 terous Insects of the British Museum, p. 1083, is supposed to be the 

 Coccus lanatus of Geoffroy, and would hence appear to be a very dif- 

 ferent insect from the one now described." 



Walsh$ next lists the species from the United States, and 

 Thomas* some years later quotes, in part the description as 

 given by Fitch, and placing it in the genus Schisoneura, in 

 which genus it has been placed by all writers since. In his 

 list of Minnesota Aphididaet Oestlund states that he found 

 apterous forms of what he supposes to be this species in Min- 

 nesota, and the next year (1887) tt he again reports with some 

 doubt, this species, quoting from the original description. 

 Packard lists the species § among the forest insects, quoting 

 from Thomas. Cowen** questionably determines as this spe- 

 cies, immature wingless forms collected in Colorado, "August 

 19, in woolly patches on young shoots of Quercus undulata," and 

 briefly describes them. Clarkeft next lists the species from Cali- 

 fornia, giving no descriptive notes other than color, which is 

 said to be black. Davidsontt reports it as abundant in Califor- 

 nia on live oak (Quercus agrifoUa). In a letter dated No- 



tOn the Genera of Aphididae found in the United States. Proc 

 Ent. Soc. Phila., Vol. i (1862), p. 303. 



*Eighth Report of the State Entomologist of Illinois. Trans. Dept. 

 Agr. 111., Vol. XVI (1880), p. 139- 



t List of the Aphididae of Minnesota. Fourteenth Ann. Rep. Geol. 

 and Nat. Hist. Surv. Minn., 1886, p. 55. 



tt Synopsis of the Aphididae of Minnesota. Bull. Geol. and Nat. 

 Hist. Surv. Minn., No. 4 (1887), p. 29. 



§ Insects injurious to forest and shade trees. Fifth Rept. U. S. Ent 

 Com. 1890, p. 212. 



**A preliminary list of the Hemiptera of Colorado. Bull. Colo. Agr. 

 Exper. Station, No. 31, Tech. Ser. No. i (1895), PP- Ii6-ii7- 



ttA list of California Aphididae. Can. Ent., Vol. XXXV (Sept., 

 1903), p. 248. 



tt Further notes on the Aphididae collected in the vicinity of Stan- 

 ford University. Journ. Econ. Ent., Vol. Ill (Aug., 1910), p. 374- 



