40 MISCELLANEOUS RESULTS OF WORK OF BUREAU IX. 



THE BUR-CLOVER APHIS. 



(Apfiia incdicaguii.s Koch.) 



This species is well known to attack both Astragalus and Aragallus, 

 as Avell as various other related plants, including clover, cowpea, 

 alfalfa, coffee bean (Cassia), bur-clover, Caragana arhorescens^ 

 Rohinia viscosa, Melilotus italica, and Glycyrrhiza lepidota. It has 

 also been observed on oxalis, and on cotton associated with the 

 common and more destructive cotton or melon aphis. 



Certain of our correspondents have remarked on the occurrence 

 of ladybirds and ants on infested loco plants, conclusive evidence 

 in the case of the ladybirds, Hippodamla con oer gens Guer., that 

 aphides were jDresent. 



The present species has a considerable literature, having been de- 

 scribed in 1857 and afterwards treated more or less fully by Monell, 

 Thomas, Oestlund, Cowen, Osborn, Hunter," and Sanderson. 



A somewhat complete account of this aphis was given by Sanderscm 

 in 190G,'' including a consideration of its food plants and descriptions 

 of different stages as well as references to literature. Still other 

 bibliographical references have been given by Hunter.'^ This species 

 is evidently of foreign origin and was first noticed in this country at 

 St. Louis, Mo., by Monell in 1870. 



THE MEAL SNOUT-MOTH. 



iPyraJi.s fdrinalis L.) 

 During July, 1907, a colony of the larva of this beautiful pyralid 

 moth was observed by the writer breeding in the roots of Astragalus 

 7noUissimus received from Hugo, Colo. Since the species is of cosmo- 

 politan distribution and commonly 

 found in most barns, storehouses, and 

 even in dwellings, it can not be posi- 

 tively stated that it attacks loco roots 

 in the open, but it quite likely infests 

 the dead roots. Frequently this spe- 

 cies breeds in clover hay, after the 

 „ , ^ ,r, ,■ ^ ■ manner of the clover-hay worm,- to 



Fig. 13.— Meal snout-moth {Pt/rahs fan- . . . i i * i i 



naUi<): a, Moth; b, larva; c, chrysalis, whicll it IS related. As a rule the 



natural size; d, head of larva; e, anal l.^^.y^ requires for itS development a 

 segment of larva; f, tip of pupa. En- . ^ , <• • , _e t 



larged (author's illustration). certain amouut ot luoisture. feeding 



on dry material which has become 

 heated, as in the case of stored grain or stacked hay. This species is 

 shown natural size, the moth at a and the larva at h of figure 13. 

 More complete accounts of the meal snout-moth are given elsewhere.'' 



« Bui. 60, Iowa Agr. Exp. Sta., The Aphididje of North America, 1901, i). 101. 

 ^ Bui. 57, Bur. Ent, U. S. Dept. A.!j;r., p[). 20-29. 

 *" Ilyitsopug lit ( .1 xoiiia ) vox ta I is Vi\ 1 >. 



'^ See Yearbook U. S. Department of Agriculture for 1S94, p. 2SC, and Farmers' 

 Bulletin 45, pp. 10, 11. 



