THE LESSER CLOVER-LEAF WEEVIL. 



Fig. 4.— The lesser clover-leaf weevil: Cocoon. 

 Much enlarged. (Original.) 



On June 12 he again visited the locality and made further search for 

 this insect in heads of red clover, commencing first near Grant road, 

 before mentioned, and working northward along the electric line 

 toward Chevy Chase. Not a single clover head was found to be 

 infested until the exact point where he and Mr. Ainslie had found 

 the infested clover heads on June 6. The plants had been mown 

 several days previous to Mr. Caudell' s visit, but among a few heads 

 that had escaped the mower at this 

 particular point two were found to 

 be infested. In the case of one, the 

 adult had issued, and in the other it 

 was still in the pupa (fig. 5), al- 

 though it issued on the following 

 morning. A further search was made 

 to the westward, about the golf 

 grounds, where occasional plants were 

 growing, and four or five infested 

 heads were found, but they were by 

 no means as abundant as at the pre- 

 viously mentioned point near Chevy 

 Chase circle. This would indicate a possibility of an excessive abun- 

 dance in one particular locality, while occurring rarely or not at all 

 elsewhere in the immediate vicinity. 



From the material collected June 12 there appeared three adults 

 on the 18th. These were found to be of a brown color, while those 

 observed in the fields were all of a greenish hue. 



On June 17 Mr. Caudell brought in from the fields a single larva and 



placed it in a breeding jar. On the 20th 

 it spun a cocoon on the inside of the jar, 

 pupated on the night of the 22d, trans- 

 formed to the adult on the 25th, eating its 

 cocoon, and finally emerged on the 26th, 

 thus giving six days from the construction 

 of the cocoon to the emerging of the adult. 

 At this time Mr. Caudell was relieved by 

 Mr. J. A. Hyslop, who watched the change 

 of color in the adults from brown to green. 

 Of the three adults emerging on June 18, 

 Mr. Hyslop found that on the 24th two 

 had become of the normal greenish hue and the third was in a 

 transitional state, the green appearing on the anterior half of the 

 elytra. The individual that emerged on June 26 reached the full 

 normal greenish color on July 7. 



While all of this information is new to American literature, it will 

 be noted that Hoffman long ago found the larva? feeding in clover 



a. b 



Fig. 5. — The lesser clover-leaf weevil. 

 Pupa: a, Ventral view; 6, lateral 

 view. Enlarged. (Original.) 



