NATURAL ENEMIES: PARASITIC INSECTS. 148 
U.S. Dept. Agr., p.17). The insect was reared from the cotton boll 
weevil (Anthonomus grandis) at Calvert, Tex., and is doubtfully 
recorded from Conotrachelus juglandis Lec. Specimens of curculionis 
were also received from Prof. A. H. Conradi, Clemson College, S. C., 
in 1908, and from Prof. Fred E. Brooks, Morgantown, W. Va., Jan- 
uary, 1907, who had reared them from Balaninus sp., As stated by 
Mr. W. D. Pierce (Journ. Econ. Ent., vol. 1, p. 386), it com- 
monly attacks Conotrachelus elegans Beh. at Dallas and Victoria, 
Tex. At Four Mile Run, Va., it was reared from Trichobaris trinotata 
Say in eggplant. Riley records the Sigalphus from a stalk-borer 
in Ambrosia (Ins. Life, vol. 2, p. 353). In West Virginia it has been 
reared in abundance son Conotrachelus affinis Boh. and in lesser 
numbers from C. juglandis Lec. (W. Va. Agr. Exp. Sta., Bul. 128. 
p- 182). 
This, so far as the writers know, is the complete host list of the 
species, and Sigalphus is so much more common on Conotrachelus 
nenuphar that this is without doubt its principal host. 
(Sigalphus) Triaspis curculionis is of general occurrence througn- 
out eastern North America, its range probably being coextensive 
with that of the plum curculio. <A list of localities, with dates of 
rearing, is given in Table LXXXI. 
Taste LXXXI.—Distribution of (Sigalphus) Triaspis curculionis, with dates of 
rearing. 
Localities. Dates of emergence. Localities. Dates of emergence. 
New Haven, Conn....- July 12-18, 1905. Fort Valley, Ga_----.... May 22-July 3, 1905. 
Youngstown, N. Y.....| July 14-Aug. 18, 1905. Myrtle. Gann so. : fab te June 10, 1906. 
Worth East, Pa........ July 8-14, 1906. Barnesville, Ga.....--. May 23-June 30, 1910. 
New Richmond, Ohio..| June 24-July 12, 1907. bake, City. las. 2.5-.6 May 23, 1905. 
East Lansing, Mich.-.-.} July 21, 1905. Hampton, Fla........- May 31, 1905. 
Valparaiso, Ind.......- J ae 18, 1905. Garnison; Rex 225-5 June 15, 1905. 
Arundel, Md)... ..:----- June 21- July 26, 1905. Mexia, Tex.. _..| June 18, 1905. 
Riv erdale, Malo Sree =. June 16-July 6, 1905. Siloam Springs, ‘Ark... .| June 3-July 18, 1908. 
Washington, BB Yt Oe mee May 22-July 17 1905. Bentonville, Ark....... June 24-26, 1906. 
1B) eee _...| June 24-July 30, 1908. OzankevAmcr aia Sanaa June 21-July 8, 1905. 
Arlmepon, Wales 2s-.-2 June 2-July 30, 1905. Salina ikanse--so 2 cee July 22, 1910. 
Winchester, Maite cee: June 15-17, 1905. Grand Island, Nebr....| July 18-22, 1910. 
Raleigh, N.C. 5.22... June 20, 1905. North Platte, Nebr.... Do. 
PETVON; Niet Grae cons oes Do. 
Localities in literature: 
St. Catherines, Ontario (Fitch). 
St. Louis, Mo. (Riley). 
Ames, Iowa (Gillette). 
The insect has been reared from many localities during the past 
four or five years, exclusively from plum curculio larve, but never 
in noteworthy numbers, although the degree of parasitism in a few 
cases reached 25 per cent. This would vary, perhaps, depending 
upon when the infested fruits were collected, as larve are parasitized 
principally in early spring. In three records that covered the entire 
season the average infestation was 2.78 per cent. 
In connection with the records of emergence of larve from fruit 
for the season in the insectary yard and other data (see p. 62), ac- 
