ELISHA MITCHELL SCIENTIFIC SOCIETY. 107 



fibrous roots usually possessed small ovoid lateral galls, while 

 the galls on the larger roots were irregularly fusiforru and not 

 very prominent. The galls on the cow pea [Dolichos catiang) 

 are quite peculiar. They are usually irregularly pyriform and 

 mostly lateral, with the larger end of the gall below. When a 

 root is attacked it appears in many cases to die just below the 

 point of attack so that the gall is abrupt at this end while there 

 is an opportunity for the worms to distribute themselves in a 

 diminishing ratio a short distance above the gall, which makes 

 the sloping narrowed portion of the pyriform body. The size 

 and irregularity of the larger end of the gall is increased by 

 one or more lateral roots, which develop very near the lower end 

 of the gall, and continue the direction of growth of the main 

 root which died. This in turn may be attacked, develop a gall, 

 die below the gall and produce a branch, and so on, successively, 

 until several pyriform galls are formed on successive branches, 

 appearing like a string of pyriform beads, the string of which 

 runs obliquely through them. In badly infected specimens this 

 is more marked and presents a very singular appearance. The 

 galls on bird's foot clover [Lotus corniculatus) are short and 

 ovoid, or more usually, by the very close proximity of several, 

 elongated and very irregular in outline. This irregularity is 

 increased bv the numerous small rootlets put out bv the diseased 

 root, into the bases of which worms distribute themselves and 

 form small convex elevations on the larger gall. 



In the roots of Amarcmtus retroflexus the worms were quite 

 abundant, but the galls were not prominent. On the larger 

 roots they were irregularly fusiform, slightly twisted, and while 

 in some cases one-half inch, one inch or more in length, the 

 diameter of the root was not greatly increased. In places the 

 surface ])ossessed small brownish, or dirty white pustules, in 

 which were cysts located very near or quite in the surface of the 

 gall, while in the same gall other cysts were imbedded in the 

 central cylinder. 



It is unnecessary to detail further in this preliminary report 

 the forms of the galls on the other diseased plants. Enough 



