-^^o. 1.] EILEY AND MONELL ON APHIDIDJE. 23 



The strawberries on Trliicii these Aphides occurred came from Pahayra, 

 N. Y., and South Bend, La., from which phices this species was probably 

 im]iorted. From an examination of a single dry specunen in the cabinet 

 of Professor Eiley, I am inclined to think that this will prove to be a 

 distinct species. The second cubital cell is smaller than in >S'. fragaricc, 

 and the distance between the first and second discoidals a little more 

 than twice that between their bases. 



Aphis, Linn, (emend.). 



Eostrum moderately long. 



Antennae remote at base, not seated on frontal tubercles, or seated on very incon- 

 spicuous ones ; usually smooth, and generally shorter than the body. 

 Seventh joint longer than the sixth. 

 Front fiat or convex. 



Nectaries subcylindric, rarely very small, very rarely none. 

 Style more or less prominent, very rarely none. 

 Wings dellexed. 



Front wings -with fou.r oblique veins, the cubitus twice forked. 

 Hind wings with two obhque veins. 



Aphis lutescens, n. sp. — Winged individuals : General color bright lemon-yellow. 

 Auteunte somewhat pilose, a little shorter than the body. The length of the joints is 

 quite variable: in some specimens, the third joint is subequal to the preceding, while 

 in others it is one-third longer. Seventh joint filiform, very much longer than the 

 third. Nectaries somewhat dvisky, gently tapering from base to ajjex, the apical 

 diameter being about two-thirds that of the base ; about three times as long as the 

 tarsi. Style dusky yellow, blunt at aj^ex, when fully extended about half the length 

 ^ of the nectaries. Fore wings hyaline ; stigma dusky yellowish, acute at the apex, 

 which is opposite the middle of the stigmal vein. Stigmal vein in one regular curve. 

 Discoidal veins of the hind wings nearly parallel ; subcostal comparatively straight. 

 Length 1.65—2.03"™; to tip of wings 3.04—3.54™'". 



On Asclepias syriaca. July, September. Saint Louis, Mo. ; Montrose, 

 Iowa ; Dubuque, Iowa ; Eock Island, 111. ; Cordova, 111. 



The very bright yellow color will at once distinguish this from other 

 IS^orth American species. 



Aphis vehnonI/E, Thos. — Winged individuals : Abdomen pale yellow ; head and thorox 

 somewhat dusky. Antennte two-thirds as long as the body, the fourth, Hfth, and sixth 

 joints subequal to the third. Nectaries cylindric, very slender, about three times as 

 long as the tarsi. 



Aphis heccabuiiga;, with which Professor Thomas supposes this may be 

 identical, has the nectaries and tail black (Passerini). 



Aphis setai;i.e (Thos.). 



Six^honophora setarice, Tlios. III. St. Lab. Nat. Hist, ii, 5. 

 Siphonophora panicola, Thos. 1. c. 



The peculiar brownish-red color of this species will easily distinguish 

 it from other non-pulverulent species. The bases of the tibiae, are always 

 pale yellowish. Leaves and spikes of Fanicum lyroUferum. August — 

 September. Saint Louis, Mo. ; Keokuk, Iowa ; Eock Island, 111. 



Aphis calendulicola, n. sp. — Apterous individuals: General color uniftn-m palo 

 green, the disk of the abdomen usually a little paler, often with a few faint, irregular, 



