U. S. Dept. of Agriculture, Manual of Dangerous Insects. 



Plate XXIX 



CL 





Injurious Grain Insects. 



Figs, a, b. — Haplothrips aculcata; c, Limothrips denticornis; d, Haploihrips tritici; e, g, Oria musculosa; f , h, 

 Trachea basilinea; i, n, Hylemyia coarctata:k, Isosoma noxiale; I, m, Trachelus tabidus. (Kurdjumov.) 



