37 



Passerini, in Gli Afidi (1860), describes the root form as follows : 

 ScMzoneura venusta, m. 



Femina vivipara aptera ovata-convexa, pallide viridis, vel interdum rubella; capite, 

 fasciis dorsalibus anticis tribus, inacula discoidali quadrata, fasciis posticis duabus, 

 punctisque margin alibus nigris. Rostrum crura media attingens. Long., V". 



Femina vivipara alata capite et tborace nigris. Abdomen viridi luteolum vel ru- 

 bellum, vittis transversis anticis duabus, macula discoidali subrotunda, fasciis dua- 

 bus posticis, punctisque marginalibus nigris. Nectaria tuberculiformia. nigra. Ala- 

 hyalinae, venis stigmateque nigris. Long., £'", V". 



Nympha lutea, capite et tborace pulverulentis. 



Turmatim in radicibus Setariae viridis, S. glaucae, S. italicae, Panici glabri, Eragros- 

 tidis niegastachyae et Ceratochloae australis. Autumno. 



Yalde similis Seliizoneurcc corni, quae autem diversa dorso omnino nigro in apteris, 

 et abdominae basi et apice tantum albido in alatis. 



Thomas gives a translation in his work on AphidaB, which reads: 



ScMzoneura venusta Pass. 



Wingless female. — Ovate convex, pale green, and sometimes reddish; bead, three 

 anterior dorsal fasciae, a quadrate discoidal spot, two posterior fasciae and marginal 

 points, black. Rostrum extending about to the middle legs. Length (of body), l mm . 



Winged female. — Head and thorax black. Abdomen, greenish-red or yellowish; two 

 anterior fasciae, a subrotund discoidal spot and marginal points, black. Nectaries 

 tuberculiform and black. Length, f to l mm . 



Pupa, yellowish, head and thorax pulverulent. Found on roots of Setaria viridis, 

 S. glauca, S. italica, Panicum glabrum, Eragrostis megastackya and Ceratochloa aus- 

 tralis in autumn. 



This translation is incomplete and imperfect, especially in the dimen- 

 sions, which are given as millimeters instead of lines (twelfths of an 

 inch), which would lead one to suppose them about half the actual size. 

 So far as I can see, Passerini's original description is entirely appli- 

 cable to the specimens obtained from roots of grasses here as well as to 

 fresh specimens of corni on Cornus leaves. 



Walsh published the following descriptions (in 1862) in the Proceed- 

 ings of the Entomological Society of Philadelphia, Vol. I, p. 304. 



Eriosomal fungicola n. sp. 



From recent specimens. Body black, with a plumb-like" bloom ; basal half of abdo- 

 men and whole of venter yellow. Antennae and legs black. Wings hyaline with a 

 dusky tinge ; veins dusky, black on the basal half of the costa ; third discoidal hya- 

 line nearly to its fork, stigma palish brown. Numerous individuals unaccompanied by 

 larvae, occurred on a large moist fungus a hundred yards from the nearest trees, 

 which were all oaks. Beat solitary individuals unaccompanied by larvae or woolly 

 matter, on two separate occasions from oaks, which, when dried, differ only from the 

 dried specimen of those found on fungus by the metathorax being varied with pale 

 greenish, as well as the base of the abdomen. Length to tip of wings .12 to. 13 inch. 



The antennae do not quite attain the base of the first discoidal when the wings are 

 expanded, and the stigma is rather more than twice as long as wide. Six speci- 

 mens in all. E. querci Fitch is larger (.16 inch) and is entirely black. Differs also 

 from the other described United States species. 

 Eriosoma? cornicola, n. sp. 



Differs from the preceding only in the body being entirely black. Numerous indi- 

 viduals, unaccompanied by any nocculent matter, and so far as I recollect by larvae, 

 occurred in September on the lower side of the leaves of the Red osier dogwood. 

 Ten specimens. 



