20 



Wheat {Triticain. viilgcvre)^ i\yo {Secale cereale)^ wild rye {Elymus 

 virf/iiilcus). oat {Avena sativa), meadow grass {J^xi yndenHe)^ green 

 foxtail {Setaria vlridii)^ red top {Agrostis vulgariii)^ cheat {Broinus 

 secalinus)^ orchard grass {Dactylis glomerata)^ and red c\ovev{Tr I folium 

 pratense). 



Its range thus far has been found to cover most of the northern 

 States, including Canada, east of the Mississippi, ])ut having graduall}^ 

 spread be3'ond that l)order as far west as Montana and South Dakota, 

 and may soon be expected to make its appearance along the Pacific 

 slope. 



Fig. 3. — MacnisiphiuinmaUs Ktilt.: inigratnry fuinalc; fireatly onlarKfil (original). 

 IJESCRIITION OF THE SPECIES. 



Apterous female. — Length of body 2 to 2.6™™; broadest about the middle of the 

 abdomen, tapering gradually toward the head and more rapidly posteriorly. Antennse 

 as long or slightly longer than the body; third joint shorter than the sixth and gen- 

 erally provided near the base with one or two small, circular, and projecting sensoria; 

 all of the hairs small and simple or but slightly clavate. The legs are long and their 

 hairs short, stiff, and simple. The nectaries, as usual, are tapering and reach about 

 to the end of the abdomen. Tail long, curved upward, and almost of the length of 

 the nectaries; it is somewhat constricted about its basal third; its terminal section 

 elongate lanceolate; the surface is densely covered with minute, acute spines and 



