Bui. 437, U. S. Dep-t. of Agriculture. 



Plate IV. 



Flat-Headed Borers. 



FIG. i:-Dicerca prolongata: Larva. A, Dorsal view; B dextral view; C. ventral vjew. X2i. 



FIG. 2.-Trachykde Ucontei: Larva. A, Dorsal view; B dextral view; ^7, vemffii If^^l- ^l 



Fig. •i.^m-mlopyqe ambiens: Larva. A, Dorsal view; B, dextral view; C ventral view. X2. 



Fig. 4.-Poh/eemvela.^co: Larva. A, Dorsal view; B, cephalic view; C, ventral view. XI.. 

 (Drawings by Eleanor T. Armstrong.) (Original.) 



