156 MISCELLANEOUS PAPERS. 



1904. Sanderson, E. D.— Insects of 1903 in Texas. <IT. S. Dept. Agr., Div. 



Ent., Washington, D. C, Bui. 46, p. 93. 



Aphis maidis received upon barley from Texas, which it had damaged in 

 January and May. In August it becomes abundant on corn, and later 

 on sorghum, and it sometimes does considerable damage. 



1905. Forbes, S. A. — Twenty-thii'd Repoi't of tlie State Entomologist of Illinois. 



< Chicago, pp. 12.3-133, figs. 115, 117. 



The corn leaf-aphis (Aphis maidis Fitch). General descriptions of this 

 aphis and its effects on plants. Reported as a corn insect from New York to 

 Texas, Minnesota, and California. G-ives in detail field observations and in- 

 seetary experiments made to determine the winter history, alternate food 

 plants, if any, etc., of the leaf aphis. 



1905. Pettit, R. H. — Insects of the garden. <Mich. Agr. Exp. Sta., Agricul- 

 tural College, Bui. 233, December, p. 55. Also Nineteenth Ann. Kei). 

 Mich. Exp. Sta., 1906, p. 206. 



Mentions Aphis maidis as being sometimes injurious to sweet corn in 

 Michigan. 



1907. Webster, F. M. — The corn leaf-aphis and corn root-aphis. <U. S. Dept. 

 Agr., Bur. Ent, Washington, D. C, Cir. 86, pp. 1-3, May 6, figs 1, 2. 



Short review of the history ; appearance and habits ; field experiments. 

 Reports the occurrence of the leaf-aphis in Japan. 



- THE SORGHUM APHIS. 



(Slpha [Chaitophorus] flava Forbes.) 



The sorghum aphis was first described by Dr. S. A. Forbes in 1883, 

 in the Thirteenth Report of the State Entomologist of Illinois. Doc- 

 tor Forbes has further mentioned it in several of his reports as State 

 entomologist, but so far as I know nothing else has been written 

 about it. 



LIFE HISTORY. 



The life history was, until 1905, unknown, but during that year I 

 made some studies upon this insect and found, among other things, 

 that it passed the winter in the egg stage. In 190G this aphis was 

 first collected June 28 at Mattoon, Ilk, by Mr. E. O. G. Kelly, on 

 sorghum and Paniciim crus-galli^ and the life history from that date 

 until the Qgg stage in the fall was obtained. Eggs thus obtained 

 were carried through the winter and young hatching from them were 

 reared. The generations were continued during the entire summer 

 until the Qgg stage in the fall. During my absences in the summer 

 of 1907 the experiments were carried on by Messrs. M. C. Tanquary 

 and E. L. Dillon. June 28 is not the earliest at which this aphis has 

 been collected in the field, as Doctor Forbes has found it on grass 

 as early as May 7. I found 4 young aphides on timothy Ma}^ 23, 

 1907, and these were bred on grass. They became winged adults as 

 follows : One on May 30, 2 on June 2, and 1 on June 4. Inasmuch as 

 I found these young aphides separately, and as no mother aphis was 

 found after a careful search, I had supposed them to be stem- 

 mothers, but, so far as I am able to learn, no record of stem-mothers 



