25 



some go upward a considerable <listaiice also. Tlie infested stalks are 

 easily known by the tassel, and most of the top being entirely withered 

 and white or yellow, Some stalks showe<l the work of more than one 

 borer evidently, unless the same one had eaten out and then eaten in 

 in other places. In several stalks the live chrysalids of the borer were 

 found near the bottom of their burrows, in the root, about even with 

 the surface of the ground. From these pupa' two of the moths were 

 bred, issuing July 12. Sorghum grown near the infested corn on the 

 college grounds could not be found infested by the borer. The same 

 borers were sent to the college from Eddy, New Mexico, with report of 

 much damage to corn. In many cases on the college farm the chrysa- 

 lids were found dead and decaying in the burrows in the stalks. A dead 

 larva was also found some distance above ground in a stalk. More 

 dead pupic than live ones were found, and probably this is the result 

 of irrigation wiiich makes it too damp for the pupjc lodged in the roots 

 and engenders disease. 



In discussing the paper Mr. Weed said that this insect damaged corn 

 to some slight extent in Mississippi and considerably more so in Loui- 

 siana. 



Mr. Howard said that this species is spreading northward rapidly 

 through the Southern States and has reached the southern border of 

 Maryland, but that it is not a pest to be feared with the methods of care- 

 ful cultivation in vogue at the north. 



Another paper by Mr. Townsend was read by Mr. Marlatt : 



A NOTE ON THE WHITE GRUB OF ALLORHINA. 



By C. H. Tyler Townsend, Las Cruccs, N. Mex. 



On the 30th of April, 1891, I had a spot of ground on Judge Wood's 

 place, near Mesilla, dug into for white grubs. The particular spot dug 

 into was selected because white grubs had been found in it before, al- 

 though I was assured by Judge Wood that not a particle of vegetation, 

 not even a. weed, had grown on it for at least three years, and probably 

 four. It was a bare spot in the back yard, and by <ligging over a square 

 foot or two of ground 16 grubs were secured, at from 6 to 10 inches be- 

 low the surface. These grubs were all about the same size, and appar- 

 ently nearly full grown. The ground contained no roots of any kind, 

 but their food habits in this barren soil were explained in this manner: 

 They were left over night in a tin can in earth in which was also placed 

 an elongate white larva about an inch and a half long that had been 

 found in the earth at the same time with the grubs. The next morning 

 nothing but the caudal extremity of this larva could be found; the 

 white grubs had devoured it. If this carnivorous habit is known of 

 AUorhina I am not aware of it. I know that some other Scarabaeid 

 larva have been found occasionally carnivorous. But AUorhina I had 

 supposed lived only on roots of grass or other plants. 



