16 



The list of grains and grasses on which it has thus far been observed 

 is rather small, though there can be no doubt that it will eventually 

 be found to subsist on many other grasses and possibh^ also on some 

 weeds or other cultivated plants. 



That it must haA-e existed in this country for a consideraljle length 

 of time seems evident from the fact that its distribution has spread 

 from Virginia to North Dakota, and that it will gradually be found in 

 all the intervening States both north and south, as well as in the 

 Western States or wherever wheat or other grains are grown, where 

 occasionally it may prove a serious pest. 



-ikicrdsiplnnii. ijmnariii Buckton: o, migratory female; h, third aiiteniial joint of same, all 

 greatly enlarged (original). 



DESCRIPTION OF THE SPECIES. 



Apterous /t'??if(?e.— Length 2.4 to 2.8"™; fusiform, Ijroadest near tlie l)ase of the 

 abdomen. Frontal tn1)ercles large, diverging at the apex, as usual, in this genus; 

 antennae bristle-shai)ed, as long or slightly longer than the abdomen; joint six, 

 including the spur, longer than joint three; generally there are one or two small, 

 circular and projecting sensoria near the base of the third joint; all of the joints are 

 very sparsely beset with short and stiff 1 iristles which are rarely slightly clavate. The 



