41 



JOINT-WORMS. 



For .special articles to four followinj,' species see Howard, Tech. Ser. 2, Div. Ent., 

 IT. S. Dept. Agric, 24 pp., 189(3; also Webster, Bnl. 42, Div. Ent., U. 8. Dept. 

 Agric, 62 pp., 1903. 



GREATER WHEAT-STRAW WORM. 



Isosonia yrande Kiley. 

 Exhibit: Adult and figure. 



BARLEY-STRAW WORM. 



IsosonKi hor'Iei Ilarr. 

 Exhibit: Adult, work, and figure. 



THE WHEAT JOINT- WORM. 



IfiosuiiKi Irilici Miiey. 

 Exhibit: Adult, work, and figure. 



THE HAIRY-FACED JOINT-WORM. 



Isosoina Jiirtifron)< How. 

 Exhibit: Adult and figure. 



THE HESSIAN FLY. 



Mayetiold destructor Say. 



( Formerly Cecidom>ji((.) 



For general article with bibliography see Osborn, Bui. 16, n. s., Div. Ent, IT. S. 

 Dept. Agric, 57 pp., 1898; Marlatt, Farmers' Bui. 132, U. S. Dept. Agric, pp. 13-22, 

 1901. 



Exhibit: Puparia, adult, work, figures, and map. 



THE GREATER WHEAT-STEM MAGGOT. 



Mero7)u/za umericana Fitch. 



For general article see Webster, Bui. 42, Div. Ent., U. S. Dept. Agric, pp. 43-51, 

 1903. 

 Exhibit: Adult, work, and figure. 



THE AMERICAN FRIT-FLY. 



Oscinis soror Macq. 



For general article see Webster, Bui. 42, Div. Ent., U. S. Dept. Agric, pp. 57-62, 

 1903. 

 Exhibit: Adult, work, and figure. 



THE LESSER WHEAT-STRAW MAGGOT. 



Oscinifi carhonarm Loew. 



For general article see Webster, Bui. 42, Div. Ent., U. S. Dept. Agric, pp. 51-.^i6, 

 1903. 

 Exhibit: Adult. 



CHLOROPS PROXIMA Say. 



For short account see Comstock, Rpt. U. S. Comm. Agric, 1879, pp. 257-258, 1880. 

 Exhibit: Adult and work. 



INSECTS INJURIOUS TO HOPS. 



THE HOP APHIS. 



I'ltorudoh JiUhiidi Schr. 

 (Attacks hop and plum.) 



For full lite history see Riley, Cir. 2, Div. Ent., U. S. Dept. Agric, 1891. 

 Exhibit: Adult, work, and figures, with two enemies: i'hrifsorxi sp. and Adalia 

 liipundata Linn. 



