246 Forty-second Report on the State Museum. [104] 



Their Injuries. 



Report has been made in Vermont of one or more of the grass infest- 

 ing species causing considerable damage to the hay crop. It was 

 estimated that, in consequence of the depredations, the quantity of 

 hay grown on some fields was one-third less than the natural yield, 

 not including the depreciation in the quality of the crop. It is but 

 seldom, however, that these insects increase to such an unusual extent 

 as to become of serious injury, and it is therefore unnecessary to indi- 

 cate any means for their destruction. A gentleman, who asks for 

 information regarding them, states that, in passing through his mow- 

 ing fields, in Auburn, Mass., they are so numerous as to wet his shoes. 

 An abundance such as this would, of course, be harmful to the crop, 

 but, fortunately, it is of rare occurrence. 



Siphonophora avense (Fabr.), 



The G-rain Aphis. 



(Ord. Hemiptera : Subord. Homoptera : Fam. Aphidid^:.) 



Aphis avenoB Fabricius : Syst. Ent., 1775, p. 736, No. 13; Sp. Ins., ii, 1781, p. 

 386, No. 18; Mant. Ins., 11, 1787, p. 316, No. 22 (name only); Ent. 

 Syst., iv, 1791, p. 214, No. 22 (description); Syst. Khyng., 1803, p. 297, 

 No. 22 (name). 



Aphis granaria Kirby : in Trans. Linn. Soc, iv, 1798, p. 238. 



Aphis hordei Kyber : in Germar Mag. Ent., i, 1815, p. 11. 



Aphis cerealis Kaltenbach: Mon. Fam. Pflanz., i, 1813, p. 16, No. 6. 



Aphis granaria. Curtis : Farm Ins., 1860, p. 289, f. 39, pi. J. figs. 10, 13. 



Aphis avence. Fitch : in Count. Gent., xviii, 1861, pp. 96, 111 ; in Trans. N. Y. 

 St. Agr. Soc. for 1860, xx, 1861, pp. 833-840; in id., xxii, 1863, pp. 

 32-38 ; 6th Kept. Ins. N. Y. (6th-9th Bepts.), pp. 91-98, pi. 1, figs, 5, 

 6— Ashton : in Proc. Ent. Soc. Ph., i, 1862, p. 141.— Walsh : in id., 

 p. 268 — Thomas : in Prairie Farmer, Jan. 18, 1862 : 8th Kept. Ins. 111., 

 1879, pp. 51-55.— Bethune : in Eept. Ent. Soc. Ont. for 1871, p. 57-8, 

 figs. 51-57.— Glover : in Kept. Commis. Agricul. for 1876, p. 36, f . 

 38.— Packard: in 9th Kept. Geolog.-Geograph. Surv. Terr., 1877, 

 pp. 710-712. 



Siphonophora granaria Buckton: Mon. Brit. Aphid., i, 1876, pp. 114-119, 



pi. 6 (descrip. habits, history, etc).— Eiley-Monell : in Bull. U.S. 



Geolog.-Geograph. Surv. Terr., v. 1879, p. 19. 

 Aphis granaria. Ormerod : Kept. Inj. Ins. for 1879, p. 22 ; id. for p. 14; 



id. for 1884, p. 25; Manual Inj. Ins. [1881], pp. 63-65. 

 Siphonophora avence Lixtner: in Count. Gent., xlvii, 1882, p. 493; in Eept. 



Keg. Univ. for 1886, pp. 112-114; in Trans. N. Y. St. Agricul. Soc, 



xxxiv, 1889, p. 105, f. 3 (as granaria). 

 Siphonophora avence. Webster : in Eept. Commiss. Agricul. for 1886, p. 576, 



( ? migration). 



Nectarophora granaria Oestlund : in Bull. No. 4, Geolog.-Nat. Hist. Surv. 

 Minn., 1887, p. 82. 



