SB 

 818 

 C578 

 ENT 



No. 85. 



Issufd March 20. 1;K)7. 



itecl States Department of Agriculture, 



BUREAU OF ENTOMOLOGY, 



L. O. HOWARD, Entomologist and Chief of Bureau. 



THE srinx; (iJkaln-aphis. 



{Toxoptera fjrcoiiiiiiiin Koiid.) 



By F. ^I. Webstei^, 

 I)) Cltar(/f of Cercdl and Forafjt'-Flant Insect Int:e,stif/(itit>iiti. 



The species which forms the sul)ject of tlie present circular (see figs. 

 1, 2), and which is commonly known in the Southwest as the "'green 

 hug," is prohahl}' an imported insect.^ It was first described bj^ Dr. C. 



Fiu. 1.— The siiriiiK Kr;iiii-a|>hi.s (Toxoptera urn m in inn): a. wiiiKeil niiui-iiiit ; '/. iintfiina 

 of same : «. much oiiiarfft'il : //. highly matriiitied. (Original ) 



Rondani — probably from Bologna, Italy — in 1852, just thirty years prior 

 to its discovery in America. Rondani states that in June the winged 

 migrants were so abundant in the streets of Bologna as to cause the 

 inhabitants great annoyance. The first time the insect came to notice 

 in America specimens were sent to the Department of Agriculture, but 

 from what locality is not known. In .June, 1884, it was found in some 

 al)undance near Cabin John, Md., on wheat. A few days later, that is, 

 about the first of July of that year, the writer found it infesting the 

 wheat in his breeding cages at Oxford, Ind., wliere he was temporarily 

 located as a field agent of this Department. 



'For technical descriptions in Enf^lish of the winged and wingless females of 

 this gfain-aphis see Pergande, Bui. :5S, Div, Ent., U, S. Dept. Agric,, p. IcS, 1<K)L\ 



