173 



Dolerus sj). yo. .A — Lai v;ii of form .'> liave been reeeived from various 

 sources, as follows: June 14, 1.SS4, and May 28, 1.S.S5, tlirouji'li F. M. 

 Webster, from Indiana, found on timothy; July 25, 18S4, from L. Bruner, 

 Nebraska, found on pass; and July 5, 1882, from J. C. Rockwood, Ilam- 

 monton, X. J., who reported that they were seriously afiecting the 

 Crauberry. Mr. Sehwarz visited Hammonton in Auj^^ust of the same 

 year and found that the Saw-fly larvjii had been confounded with the 

 Army AYorm, which fed on the Crauberry and also on Juncus. The Saw- 

 fly larvie feed on notliing but the Jiincus {J. canadcxsis f). At the time 

 of his visit, August 4, Mr. Schwarz was able to fljid but two larv*. 



What is evidently the same larva was found during the latter half 

 of May, 187G, feeding on Juncus in Ofallon Park, St. Louis, Mo. These 

 larvie were numerous and in confinement would not feed on Blue 

 Grass, but fed readily ou the Juncus. They reached full growth Juue 

 1-13, and entered the ground. Afterwards one earthen cocoon was 

 found in the cage, but no adults were reared. 



Dolerus sp. Ifo. 4. — Larva3 of form 4 were found at Oxford, Ind,, 

 by Mr. Webster, on timothy. Additional material was received Juue 

 27, 1884, and May 29 and June 13, 1885. Euplectrus larvte were at- 

 tached to the first segment of one of these. Larvie of the same species 

 were found Juue 6, 1886, feeding on Juncus iu Schuetzeu Park, Dis- 

 trict of Columbia. Xo adults were reared. 



Dolerus sp. Ko. 5. — Larvre of form 5 were received from Ch. F. Krei- 

 der, North Lebanon, Pa., June 4, 188G, with the report that they injured 

 wheat, cutting oft" the heads. Three larvie of this form were with the 

 lot brought from near P)altimore by Mr. Lugger, June 18, 188G, and found 

 cutting oft' the heads of wheat. The majority of the lot from Mr. New- 

 land, Middletown, Del., May and Juue, 1887, also belong here. 



Dolerus coUaris, Say. — Larvie, some of which belonged to this species, 

 were received from Mr. Webster, May 31 and June G and 14, 1 884, fouud 

 on timothy. From these an adult was obtained April 18, 1885. Which 

 of the several forms of larvie belongs to this si)ecies can not be i)osi- 

 tively determined, as no material was saved. 



The cocoon is 10 by 5 mm. 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 larvae above described belong to this species, a large 



