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Dolerus sp. No. 3.—Larve of form 3 have been received from various 
sources, aS follows: June 14, 1884, and May 28, 1885, through F. M. 
Webster, from Indiana, found on timothy; July 25, 1884, from L. Bruner, 
Nebraska, found on grass; and July 5, 1882, from J : Geese nce Ham- 
monton, N. J., who reported that they were seriously affecting the 
Cranberry.. Mr. Schwarz visited Hammonton in August of the same 
year and found that the Saw-fly larve had been confounded with the 
Army Worm, which fed on the Cranberry andalsoon Juncus. The Saw- 
fly larvee feed on nothing but the Juncus (J. canadensis ?). At the time 
of his visit, August 4, Mr. Schwarz was able to find but two larvee. 
What is evidently the same larva was found during the latter half 
of May, 1876, feeding on Juncus in Ofallon Park, St. Louis, Mo. These 
larve were numerous and in confinement would not feed on Blue 
Grass, but fed readily on the Juncus. They reached full growth June ~ 
1-13, and entered the ground. Afterwards one earthen cocoon was 
found in the cage, but no adults were reared. 
Dolerus sp. No. 4.—Uarve of form 4 were found at Oxford, Ind., 
by Mr. Webster, on timothy. Additional material was received June 
27, 1884, and May 29 and June 13, 1885. Euplectrus larve were at- 
tached to the first segment of one of these. Larve of the same species 
were found June 6, 1886, feeding on Juncus in Schuetzen Park, Dis- 
trict. of Columbia. N O ada were reared. 
Dolerus sp. No. 5.—Larvee of form 5 were received from Ch. F. Krei- 
der, North Lebanon, Pa., June 4, 1886, with the report that they injured 
wheat, cutting off the heads. Three larve of this form were with the 
lot brought from near Baltimore by Mr. Lugger, June 18, 1886, and found 
cutting off the heads of wheat. The majority of the lot from Mr. New- 
land, Middletown, Del., May and June, 1887, also belong here. 
Dolerus collaris, Say.—Larvee, some of which belonged to this species, 
were received from Mr. Webster, May 31 and June 6 and 14, 1884, found 
on timothy. From these an adult was obtained April 18, 1885. Which 
of the several forms of larve belongs to this species can not be posi- 
tively determined, as no material was saved. 
The cocoon is 10 by 5mm. The outer layer consists of particles of 
earth loosely cemented together, and is quite intimately connected with 
the inner layer, which consists of a brownish parchment-like material. 
The adults of this species are somewhat smaller than D. arvensis, 
which they greatly resemble. They may be easily separated from ar- 
vensis by the shining black body and yellowish-red fore thorax, the lat- 
ter including the prothorax and more or less of the mesothorax. 
This species occurs throughout the United States and Canada. There 
are specimens in the National Collection from Central Missouri, Colo- 
rado, and Indiana. 
Dolerus sericeus Say.—There is little question but that one form or 
other of the larve above described belong to this species, a large 
