208 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION 
arable cambers in the Central Park, New York, iu May, 18G9. (Osten 
Sacken, Trans. Amer. Bnt Hoc. iii, 53.) 
< nri/tlituti an udta (Say). {Tingi* avcuata Say.) 
Order Hk.miptera; family TUffGl m> i . 
The following notice of this bug is eopied from Professor Riley's 
notes : 
Jane 26, L876, found in Ofallon Park, on 1 1 1 «- under side of leaves of white oak, the 
eggs, newly hatched larva-, and other- in various development, as well as a 
few mature insects. Eggs laid in patohes, but n<»t sloes together, being net 
ularly : they are pointed at both ends and attached by oue end, and are of a dull 
black color. (See also Liutner, 4th Rep. p. 108, Figs. 42, 43.) 
291. The oak-leaf phylloxera. 
Phylloxera rileyi Lichtenstein. 
This insect forms a yellow circular spot on the under side of the leaf, 
but showing plainly above, of the white and post oak ; the species is of 
small size and unusually slender, and with long tubercles in the pupa. 
A full account has been published by Riley iu Seventh Mo. Kept., pp. 
118-121. 
292. Lachnus qaercicolens Ashmead. 
This plant louse was found by Ashmead early in February in Florida, 
feeding on the under surface of the leaves of the live oak (Quercus 
virens) ; winged specimens, however, were not taken until April 
Wingless female. — Length, .05 inch, ovate; reddish, becoming brown with age. 
Vertex of head brown; beak reaching to the middle coxre, reddish at the base, yel- 
lowish in the middle and brown at tip ; antenme 7-jointed, reaching to the honey 
tubes, whitish, basal joint reddish; joints annulated at tip with black; apical joint 
short, black; honey tubes almost obsolete, as wide as long, whitish; style hardly 
visible, whitish, pubescent, legs pubescent, posterior pair dark brown or black, mid- 
dle and anterior pair reddish-yellow, feet infuscated. 
Winged individual. — Length, .05 inch. Same as apterous female, excepting that 
the abdomeu is lighter in color ; the middle femora and coxa? dark brown, and wings 
hyaline, with the stigma and veins green. (Ashmead, Can. Ent, XIII, 155.) 
293. Phylla})his niger Ashmead. 
This in some respects auomalous Aphis was detected feeding on 
a tender shoot of the willow oak (Quercus phellos, variety laurifoliee). 
No winged specimens were found. The broad head, slightly pubescent 
abdomen, and other characters exclude it from the genus Lachnus. 
Wingless female. — Length .05 inch, ovate and of a shining black color; head broad, 
nearly as loug as wide, slightly arcuate in front aud with two longitudinal depres- 
sions on the vertex;: beak long, reaching beyond hind coxa?, black at base, but be- 
coming reddish towards tip and slightly pubescent, antenna? 7-joiuted, situated very 
widely apart and not on tubercles, brownish in color, with the terminal joint very 
minute ; metathorax a broad, smooth, shiuiug, convex plate; abdomeu wider than 
long, and sides flattened to honey tubes, slightly pubescent : honey tubes black, almost 
obsolete, as wide as long; style not visible, anus pubescent; legs dark brown, ap- 
proaching black, pubescent, posterior pair long. (Ashmead.) 
