284 ENTOMOLOGICAL NEWS [Oct., 'l8 



beak barely surpassing 3d coxae ; vertex very convex ; body of large 

 examples 2.5 by I..S mm. very plump, almost globular; cauda very 

 short, oval, set with short hairs only ; no cornicles, eyes dusky and 

 small in size ; ocular tubercle large but not very prominent ; body and 

 appendages very free from hairs. 



This is, by far, the more abundant of these two species in 

 Colorado, and does considerable damage to grasses and grains 

 every year. It is most common upon somewhat isolated clumps 

 of grass along the roadside, the borders of the fields and upon 

 ditch banks, where the ground is not often cultivated. The 

 louse colonies work mostly upon the roots, close about the 

 crown of the plants, for the most part within one-half inch of 

 the surface of the ground, and always are accompanied by 

 ants. As a result, the roots are often largely destroyed, the 

 plants stunted and have the appearance of drying out, and 

 are easily pulled from the ground. The lice, being wholly 

 underground, are seldom noticed by the farmer. 



While this louse is a very general feeder among the grasses. 

 Hordeum, or squirrel-tail grass, and the Agropyrons, or wheat 

 grasses and Kentucky blue grass, seem to be favorites. We 

 have taken this species also on wheat, oats, barley, timothy, 

 Bromus inermis, B. tectorwn, and species of Elymus. 



EXPLANATION OF PLATE XVI. 



Figures I and 2 Apterous viviparous and alate viviparous forms 

 of Forda formicaria; 3 and 4 antennae of the same; 5 and 6 apterous 

 and alate forms of Forda olivacea, 7 and 8 antennae of the same. 

 Original ; Miriam A. Palmer, delineator. 



Pyrrhotes haematoloma H. S., and Leptocoris trivittatus Say 

 in Illinois (Hemiptera, Coreidae). 



The distribution of the above two coreids as given by Van Duzee 

 in his recently published catalogue does not extend east of the Missis- 

 sippi River. The first named species is represented in our collection 

 by one specimen taken bv the writer at Havana, Illinois, August 30, 

 1917, in a sand blowout, and several specimens from Texas, one of 

 which was taken at Brownsville by Mr. C. A. Hart. The other species 

 is the very common box-elder bug in connection with the abundance 

 of which in Illinois we receive many letters annually. J. R. MALLOCH, 

 Urbana, Illinois. 



