35 



twig inserted in water, isolated from other leaves, and which bad been 

 carefully examined with lens to see that it was free from larvae, and 

 protected by cheese-cloth cover. This individual took kindly to the 

 situation, remained constantly on the leaf, and produced a number of 

 larvae which developed as rapidly as those brought from the woods, 

 agreeing perfectly with them in every particular that I could observe, 

 and proving their ability to develop on Gornus. Unfortunately their 

 propensity for traveling down the twigs resulted in their being drowned 

 in the water in which the twig was kept. I think, however, that their 

 developing perfect^ on the Cornus leaf, and the perfect agreement of 

 apterous males and females so developed with those occurring normally 

 on Cornus in woods, is good evidence of identity. 



In the meantime lice had been found in some numbers on the roots of 

 grasses not yet dead, especially on Panicum, and many of these had 

 been placed in breeding-jars in hopes of securing additional winged 

 specimens. While apparently thriving they failed to acquire wings, 

 but on September 24 I observed in one of the jars an apterous individ- 

 ual, and directly behind it an egg evidently fresh -laid, elongate, oval, 

 greenish, polished, like eggs of corni on Cornus. This was mounted 

 with the apterous individual, and in the body of the latter another egg 

 was apparent. The egg was laid at the surface of the earth in the jar, 

 and similar eggs were found in pill-boxes in which root-lice were con- 

 fined. A close examination of roots, especially those of Panicum from 

 the field, enabled me to find a number of small apterous individuals like 

 the males on Cornus leaves, as well as the small apterous and oviparous 

 females. These occurred with a larger form, exactly like those which 

 had been observed to acquire wings, and the conclusion seemed inevi- 

 table that these viviparous and apterous forms produced in the ground 

 a brood of apterous males and females. These latter were observed 

 attempting coition, though in no case did I seethe act completed. The 

 males are of an orange color, darker than the females, and differ from 

 males on Cornus leaves in being shorter, and in lacking the purplish tint 

 usually present in those. The females agree well with females on 

 Cornus leaves, but are shorter, have six-jointed antennas, and are 

 slightly lighter colored, which would be expected in individuals living 

 under-ground. September 28, eggs from these root-forms were more 

 numerous, and by October 3 I found them quite plenty in my jars. 

 One oviparous female was observed with three eggs extruded from the 

 body, adhering by the ends, and the last one still partly within the 

 body. They are whitish at first, but turn yellow on exposure, and later 

 turn quite dark. 



The eggs seem to be deposited at hap-hazard on surface of earth, 

 sides of boxes or jars, and each female appears to produce but two or 

 three eggs. 



These observations, I am free to confess, appear to complicate the 

 round of life of the species, and to make the complete circle from grass 



