38 



Dr. Thomas, in repeating these descriptions in the "Aphididfe" (8th Re- 

 port State Entomologist of Illinois, pp. 141, 142), separates the two by 

 Schizoneura caryce Fitch, so that "Differs from preceding only," etc., re- 

 fers to caryce and not to fungicola. This circumstance is liable to mis- 

 lead, unless Walsh's original descriptions are at hand for reference, and 

 may account for the uncertainties that have been stated in efforts to 

 determine Walsh's cornicola found on Cornus. 



Considering that fungicola was on a fungus, a plant never known to 

 support Aphides, and that the difference noted by Walsh is such as 

 results from greater maturity of specimens that have located on Cornus, 

 and further, that fungicola agrees perfectly with both descriptions of 

 corni and with fresh individuals found on Cornus leaves, it seems prettv 

 certain that these two descriptions refer to one and the same species. 



Thomas' description of 8. panicola, published in 1879 (8th Eeport, 

 State Entom., Illinois, p. 138), is as follows, and is said to have been 

 written from recent alcoholic specimens : 



Winged female. — The front wings with the third discoidal veins once forked; third 

 vein obsolete at base; first and second veins arising very near each other; stigma 

 short, rounded behind ; fourth vein nearly straight ; costal bent outward to the base, 

 leaving a rather wide space between it and the subcostal; antennae short, reaching 

 about to the base of the fore wing ; slightly hairy; third joint rather longer than the 

 fourth and fifth united; sixth slightly longer than the fifth, with a very short, in- 

 distinct, blunt spur at the tip ; beak rather long, reaching nearly to the hind coxae, 

 slightly hairy ; eyes present and of the usual size or nearly so. 



Wingless female. — (Probably not fully developed.) Very broadly ovate and very 

 convex, being suborbicular ; antennas, reaching about to the end of the thorax, rather 

 thick and heavy and not tapering to apical joints, if any difference rather thicker 

 than the middle ones ; third joint longest but not quite equal to the fourth and fifth 

 united; fifth rather longer than the fourth, gibbous on one side at the tip ; sixth 

 nearly as long as the third ; beak, long, reaching fully to the hind coxa? ; color of the 

 alcoholic specimens, reddish-yellow ; eyes minute and black. 



Found on the roots of Panieum gldbrwm and other grasses by H. [Th. ?] Pergande 

 at St. Louis, Mo., in November. 



The difference in the length of the beak will certainly distinguish this from Tychea 

 panici, even supposing the antennas in the latter to be undeveloped. 



Mr. O. W. Oestlund,in Synopsis of the Aphididse of Minnesota (Bull. 

 No. 4, Geol. and Nat. Hist. Surv. of Minu.) describes both corni and 

 panicola, and their identity could not be more strikingly indicated. 



S. corni. 



Head and thorax black ; abdomen reddish-black, with a large patch of velvety 

 black covering all of the dorsum except three and some of the last segments. An- 

 tennae reaching to the end of thorax ; not annulated, hairy, with a single row of cir- 

 cular sensoria on the under side, about six to the third joint, three to the fourth, two 

 to the fifth, and one at the contraction of the sixth; III, 0.30 mm ; IV, 0.12 mm ; V, 0.10™ m ; 

 VI, 0.15 ,nm , with the short unguis. Beak reaching third coxa. Wings hyaline > with 

 slender veins ; cubital obsolete at base ; stigma broad and short, smoky. Honey 

 tubes a circular opening almost on a level with the abdomen. Expanse of wings, 

 6-7 mm . 



S. panicola. 



Head and thorax dusky or black ; abdomen pale greenish with some black mark- 

 ing above, on the last segment at least. Antennae reaching to the end of the thorax, 



