237 



side by side in fresh specimens. It seemed possible that they move 

 from Milkweed to Oak in autumn, l)ut egg-laying- broods and eggs 

 were found on both plants, 



Tetraneura graminis Monell. — On Leersla virginica. 



Tetraneura ulmi L. — On Ulmus americana. Winged forms of Te- 

 traneura graminis were found dying from Leers ia mrginrca and at the 

 same time winged specimens of Tetraneura ulmi Y\x^re observed aliglit- 

 ing and hiding under rough bark of the Elm, where afterward the 

 peculiar males and females of the latter were found, as also the single 

 ^gg of the female. 



Colopha ulmicola Fitch. — Specimens this season were taken on the 

 bark of Cork Elm in October. 



CoJopha eragrostidis Middleton. — On Eragrostis frankii and purshii. 

 i^ot compared with the original description. So far as descriptive 

 characters go, there is no difference between this species and the ulmi- 

 cola occurring on Elm. 



Pemphigus attenuatus n. si). — On Smilax rotundifolicv. They accumu- 

 late in colonies extending for a foot or more along the vine and give it 

 the aiipearance of being two or three times its normal diameter and of 

 a grayish woolly surface, or as if covered with some abnormal growth. 

 The lice hang by their beaks, with the end of the body held at right 

 angles to the vine, so that the outer surface is quite uniform. Some 

 specimens, nearly the same if not identical with the winged forms on 

 Smilax, were taken in August, 1889. These were covered with an ex- 

 tremely long, white excretion. In flight the dense cottony mass made 

 them appear like large flakes of snow. 



Description. — Body robust, purple, black. Head broad. Auteniiie wide apart, 

 nearly as long as body, dusky throughout. Wings narrow, attenuate at tip, veins 

 very slender. Legs black, tibiae slightly pale toward apex. Described at time of 

 collecting. 



Alate viviparous form. — Length of body, 1.8 to 2"'"i; of antennte, 1.33 to 1.34 

 (I, O.S'""!; II, 0.12»'n»; III, 0.22«"n; IV, 0.25"'"'; V, 0.30'""'; VI, including nail, 

 O.SO'^i-^). Width of body, 0.7"'"'. Length of wing, 3.6 to 3.9"'"'; width, l"'™. Kos- 

 trum reaching beyond second pair of coxa?. Wings narrow, pointed, from which the 

 name is derived. Third discoidal obsolete at base, the first and second discoidals 

 approximate at point of issue. The same is true of the discoidals of hind wings. 

 Stigma long and narrow. Stigmal vein nearly straight and running nearly to apex 

 of wing, approaching in this respect some species of Lachnus. Cauda and cornicles 

 obsolete. Antennte not annulate, third joint with a few enlarged sensoria, remain- 

 ing joints slightly rough or irregularly rugose. From specimens in balsam. 



Apterous viriparous form.— L,eugth. of body, 3.50 to 3.90"^'"'; width, 1.80 to 2'""'. 

 Lengthof antennae, 1.30 to 1.40'^'"' (joint I, 0.10"""; II, 0.15"'"^ ; 111,0.32"'"'; IV, 0.25"""; 

 V, 0.27'"'"; VI, 0.30'""'). Antennae slightly roughened and with a few hairs. Ros- 

 trum reaching second jiair of coxae, stout. Body walls and appendages brown, the 

 fluids of the body give a dark olive-green background, while the whole surface is 

 covered with a gray flocculent secretion. 



In balsam the color changes to a purple black. Cauda obsolete. Cornicles barely 

 indicated. 



Apterous males or larvce (?) — Length of body, 1"'"'; width, 0.4 to 0.5'""'. Rostrum 

 reaching nearly to end of abdomen, stout. Antenn;e length 0.7"'"'; only five joints 

 visible. Eyes small, red. 



