12 BULLETIN 1066. U. S. DEPARTMENT OE AGRICULTURE. 
on the side of the nut (PL VI. C) and a whitish larva feeding within. 
(PI. VI. D.) The dropping of nuts from this cause is sometimes 
very heavy. 
HISTORY AND DISTRIBUTION. 
This species was described and named in 1S37 by Boheman. 9 
Since the original description was published the species has been 
referred to occasionally by entomologists, but it has at no time at- 
tracted extensive notice. It has been recorded from the States of 
Xew Jersey. Ohio. Virginia. "West Virginia. Louisiana. Florida, and 
the District of Columbia. 
FOOD PLAXTS. 
During the last 15 years the writer has reared this curculio 
frequently from hickory nuts in West Virginia. Pierce 10 has 
reared it from hickory nuts in Louisiana. Apparently its attacks 
are confined to the nuts of various species of hickory. In TTest Vir- 
ginia the nuts of the pignut hickory. Hicoria glabra* seem to be pre- 
ferred to those of other species, although shagbark hickory nuts, 
H. ovata. are sometimes attacked extensively. Nuts of H. alia and 
H. minim-a are attacked to some extent and it is probable that injury 
may occur to the nuts of all species of hickory that grow within the 
range of the insect. 
LIFE HISTORY. 
The egg (PL VT. B) is oblong, elliptical, translucent white, the 
surface smooth and shiny. The average dimensions are 1 mm. long 
by 0.6 mm. thick. The eggs hatch in from five to seven days. 
The larva (PL VT. D) is white with light brown head, full-grown 
specimens measuring 12 mm. in length. The larva? are practically 
identical with those of the preceding species except that they taper 
somewhat more abruptly at the anal end than Conotrachelus retentus. 
and the bristles, with which the body is sparsely clothed, are shorter 
and less conspicuous than in C. juglandls. They are found feeding 
singly in fallen nuts during the months of July and August. The 
infested nuts drop about 20 days after oviposition takes place, 
or about 2 weeks after the larvae begin to feed. At the time 
of dropping, the nuts average from one-half to two-thirds grown. 
6 BOHEMAX, C. H., Ill SCHOEXHERR, C. J. SyxOXYMIA IXSECTORFM. OEXERA ET 
SPECIES CUBCDLIONlDUMj t. 4. pals. 1. p. 429-430. 1837. 
10 Pierce, W. Pwight. Ox the biologies of the rhtxchophora of xorth america. 
Studies from the Zoological Laboratory of the University of Nebraska. No. 78. Xebr. 
State Bd. AgT., Rpt Zoologist, p. 274. 1907. 
