Bui. 737, U. S. Dept. of Agriculture. 



Plate I. 



Egg and Larva of the Tobacco Beetle (Lasioderma serricorne). 



Fig. l.— Front view of face. Fig. 2. — Side view of larva. Fig. 3.— Thoracic and abdominal areas: 

 aa, Parasternum; a, labial palp; ae, alar area; b, stipes labiaiis; c,mentum; d,submentum; dl, dorso- 

 lateral suture; e, gula;/, presternite; g, antenna; h, ocellus; i, stipes maxillaris; k, cardo; I, epistoma; 

 m, clypeus; 7i,labrum; o,preepipleurum; oe,basisternum; p, epipleural lobe; g, poste'pipleurum: r, 

 prehypopleurum; s, posthypopleurum ; t, prescutum; u, scutum; v, scutellum; vl, ventro-lateral 

 suture; x, postscutellum. Fig. 4. — Anterior portions of face (labrum, clypeus, epistoma, and frons): 

 Ant, antenna; c, clypeus; el, epistoma, lateral part; cm, epistoma, median part; /, frons. Fig. 5. — 

 Prothoracic leg. Fig. 6. — Mandible, ventral side. Fig. 7.— Underside of head: a, Maxillary articu- 

 lating skin; c, cardo; ep, epicranium; g, gula; h, hypostoma; Ic, lacinia; m, mentum; o, ocellus; ps, 

 presternum; sm, submentum; stl, stipes labiaiis; x, process between lacinia and hypopharynx. 

 Fig. 8.— Egg. (Figs. 1 and 8 drawn by Joseph D. Smith; figs. 2-7 drawn by Adam G. Boving.) 



