,442 ENTOMOLOGICAL NfiWS. [DcC, 'll 



pale yellowish; the head, distal one-half of antenna, most of the 

 rostrum, the anal plates, cauda and legs, especially the tarsi, dusky; 

 eyes black. In most specimens an impressed line just inside the 

 lateral margin extends nearly the full length of the thorax and abdo- 

 men. The legs are very short, the hind femora measuring about .34 

 mm.; the hind tibiae .43 mm.; length of antenna .59 mm.; joint III 

 slightly the longest; joints IV, V and VI sub-equal; beak just sur- 

 passing the second coxae ; cauda rather broad and flat, pointed, a 

 little longer than the width at the base; length .10 mm.; cornicles 

 very small, tuberculate, located upon joint 6; in color like the body 

 or a little dusky. 



Described from specimens taken on wheat at Fort Collins, 

 October 10, 1908. Winged specimens have also been taken 

 early in June and in July. 



Apterous Oviparous Female. — Apparently the apterous oviparous 

 females are exactly like the viviparous form. At least they are so 

 nearly alike that I do not notice any marked difference in characters. 



Apterous Male. — A few males were present in the colony studied. 

 They are more yellow in color with less powder upon their bodies. 

 The antenna is entirely black or blackish, and the other parts that are 

 dusky in the females are dark in color in the males. Length about 

 1. 10 mm. ; width .40 mm. ; length of antenna and the various joints 

 as in the viviparous female above, or slightly shorter ; the rostrum 

 attaining the third coxae ; hind femora, including trochanter .29 mm. ; 

 tibiae .40 mm. I have not been able to distinguish any sensoria upon 

 the antenna except the cluster at the distal end of joint 6. 



This is seemingly a rather rare species occurring upon 

 grasses, and has been taken several times by L. C. Bragg upon 

 the leaves of blue-stem, Agropyron glaiicum, and upon wheat 

 during the summer months in the vicinity of Fort Collins. 



Chaitophorus agropyronensis n. sp. (Plate XVI, Figs. 10-12.) 



This louse differs so much in general appearance from typi- 

 cal Chaitophorus species that is scarcely seems right to place it 

 here, but I dislike to establish a new genus for it. 



Alate Viviparous Female. — General color of abdomen, green: the 

 black or blackish parts are head, thorax above and below, antenna 

 (except basal portion of joint 3), tarsi, distal ends of tibiae, entire 

 femora, cornicles, a spot on each lateral margin of the abdominal 

 segments, a rather broad but much interrupted band on the abdominal 

 segments after the first, and narrow transverse dashes between the 

 segments, and the knobbed cauda. The wing veins and the stigma are 



