Vol. Xxii] ENTOMOLOGICAL NEWS. . 443 



also black or blackish. The body is everywhere set with stout gray 

 hairs much as in the apterous form, and is also everywhere covered 

 with a white pulverulence. The cornicles are conical, the length being 

 less than the basal diameter; wing venation normal, the cubital usually 

 with two forks but the second fork sometimes lacking; the cubital 

 cell shallow, the vein being somewhat recurved; legs short and stout; 

 length of body 1.65 to 1.90 mm.; wing 2.50 mm.; antenna .65 mm. ; hind 

 tibiae .60 mm.; tarsi unusually long, measuring .20 mm.; joints 3 and 

 4 of antenna coalesced into one with no indication of the union in 

 most examples before me, and equal in length to joints 5 and 6 and 

 the spur combined, the spur being a trifle shorter than the joint which 

 bears it, and this joint is fully as long, or a trifle longer than the joint 

 preceding it ; hairs of body short and stout with acute points. Cauda 

 short with knob broad and not narrowly constricted at base ; the long 

 third joint of the antenna with 4 to 5 small circular or oval sensoria. 

 The pupa is greenish yellow, set with gray hairs, and has very black 

 wing pads; black markings of abdomen very similar to the alate form; 

 a pair of very conspicuous black patches on mesothorax. 



Described from specimens taken on Agropyron glaucum at 

 Fort Collins, Colo., May 30, 1911. Fairly common. 



Apterous Viviparous Female. — A rather long narrow bodied louse, 

 of a rather uniform rusty yellow color when fully mature but with a 

 distinct darker brown, somewhat broken stripe extending longitudi- 

 nally the whole length of the body on either side of the median line; 

 eyes dark red; legs and antenna dusky yellow, the latter with the 

 terminal joints blackened; number of joints 5; joints 4 and 5 and the 

 spur sub-equal. Antenna less than one-third the length of the body; 

 legs short and rather weak ; cornicles raised but little above the sur- 

 face, broader at base than they are long; cauda knobbed; the entire 

 surface of body set with short, stout gray hairs. 



A letter from Mr. E. O. G. Kelly, dated Wellington, Kansas. 

 October 6, 1908, states that he has taken this louse in several 

 places throughout the Northwest, both last year and the pres- 

 ent summ.er. 



Agropyron glaucum is the only food plant upon which we 

 have taken this louse. The colonies rest upon the upper sur- 

 face of the harsh leaves of this grass and are usually accom- 

 panied by small ants. 



Chaitophorus artemisiae n. sp. (Plate XVI, Figs. 13-16.) 



Alate Viviparous Female. — Abdomen cinnamon brown, head and 

 thorax brownish black; tibiae and basal portion of third joint of 



