4] 
JOINT-WORMS. 
For special articles to four following species see Howard, Tech. Ser. 2, Div. Ent., 
OS: Depts Aericee24 pps. 1896." also Webster, “Buls42)) Div. Hot. U.S. Dept: 
Agsric:; 62 )pp., 1903S: 
GREATER WHEAT-STRAW WORM. 
Tsosoma grande Riley. 
Exuresir: Adult and figure. 
BARLEY-STRAW WORM. 
Tsosomu horde: Harr. 
Exuisir: Adult, work, and figure. 
THE WHEAT JOINT-WORM. 
Tsosoma tritici Riley. 
Exuisit: Adult, work, and figure. 
THE HAIRY-FACED JOINT-WORM. 
TIsosoma hirtifrons How. 
Exuisir: Adult and figure. 
THE HESSIAN FLY. 
Mayetiola destructor Say. 
(Formerly Cecidomyia.) 
For general article with bibliography see Osborn, Bul. 16, n. s., Div. Ent., U.S. 
Dept. Agric., 57 pp., 1898; Marlatt, Farmers’ Bul. 132, U. 8. Dept. Agric., pp. 13-22, 
1901. 
Exuisit: Puparia, adult, work, figures, and map. 
THE GREATER WHEAT-STEM MAGGOT. 
Meromyza americana Fitch. 
For general article see Webster, Bul. 42, Div. Ent., U. 8. Dept. Agric., pp. 43-51, 
1903. 
Exursit: Adult, work, and figure. 
THE AMERICAN FRIT-FLY. 
Oscinis soror Macq. 
For general articie see Webster, Bul. 42, Div. Ent., U. S. Dept. Agric., pp. 57-62, 
1903. 
Exuisit: Adult, work, and figure. 
THE LESSER WHEAT-STRAW MAGGOT. 
Oscinis carbonaria Loew. 
) 
For general article see Webster, Bul. 42, Div. Ent., U. S. Dept. Agric., pp. 51-56 
1903. 
Exuisir: Adult. ’ 
CHLOROPS PROXIMA Say. 
For short account see Comstock, Rpt. U. 8S. Comm. Agric., 1879, pp. 257-258, 1880. 
Kxarsit: Adult and work. 
INSECTS INJURIOUS TO HOPS. 
THE HOP APHIS. 
Phorodon humuli Sehr. 
(Attacks hop and plum.) 
For full lite history see Riley, Cir. 2, Div. Ent., U. S. Dept. Agric., 1891. 
Exnisir: Adult, work, and figures, with two enemies: Chrysopa sp. and Adala- 
bipunctata Linn. 
