\'ol. Xxix] ENTOMOLOGICAL NEWS 283 



We have taken the alate form from June 2 to July 12 on the 

 roots of grasses. 



Apterous Form — The adult apterous form is sordid grayish green 

 in color, is very plump, and set with rather plentiful long fine hairs; 

 the beak reaches to a point half-way between the hind coxae and the 

 tip of the abdomen, and joint 3 of the antenna is distinctly longer 

 than joints 4 and ,s with spur combined; length 2.80 mm. These 

 characters easily separate this species from F. oliv^cca. See figures 

 I and 3- 



We have taken this species on the roots of McUca hiilbosa, 

 Poa pratcnsis. Phlciim alpiinnii, and Elymits sp. in Colorado. 



Forda olivacea Roh. (Plate XVI, figures .5, 6, 7 and 8). 



Alate viviparous female. This is a very abundant louse upon the 

 roots of different grasses. To the naked eye. or by the use of a hand 

 lens, the alate lice appear entirely black. The real color is dark 

 olive green. The head, thorax, antennae, legs, anal plate and a trans- 

 verse band on each segment of the abdomen on the dorsum are black, 

 or nearly so. In some, the legs, especially the middle pair, show 

 considerable light brown color. 



The body is very robust, wings stout and short, stigma short, broad 

 and blackish, especially along the lower margin ; cross-veins slender 

 and brown in color, veins i and 2 rising near together, but not uniting 

 as in formicaria: hind wing with 2 transverse nervures ; sub-costal 

 vein very strong and black: transverse veins simple as in Pemphigus, 

 stigma! vein rising at center of the under side of the stigma and 

 extending to the tip of the wing. 



Joint 3 of the antenna with a poorlv defined double row of oval 

 transverse sensoria, about 20 to 24 in number; joint 4 with 2 to 4 large 

 oval sensoria, and joint .s with i or 2 before the large one near the 

 distal end; spur rather short; joint 3 as long as the two following, 

 together, including the spur; beak attaining the second coxae. Cauda 

 short, broad, rounded posteriorly. 



Length of body, 1.80 to 2.20; wing, 2.50 to 3; antenna, .65 to .70; 

 hind tibia. .75 mm. 



Described from numerous specimens taken at Fort Collins, 

 Colorado, by L. C. Bragg, June 25, 1912, and by the writer, 

 June 26, 1915, in both cases from Hordenm sp. 



Apterous female : Color sordid greenish yellow, head and prothorax 

 a little dusky ; legs, antennae, anal and genital plates, and usually i 

 or 2 transverse lines on terminal segments of abdomen above, dusky 

 to blackish; antennae. .54 mm. long and 5-jointed; joint 3 shorter than 

 4 and 5 together; joints 4 and 5 each with sensorium near distal end, 



