3ul. 1107, U. S. Dept. of Agriculture. 



Plate I. 



The Lead-Cable Borer (Scobicia declivis). 



Figs. 1-7 and 9-12.— First-stage larva. Figs. 13-15.— Second-stage larva. Fig. 16.— Mature larva. 

 Fig. 8. — First-stage larva of Lyctus sp.: Posterior end of ninth abdominal segment with two cerci, 

 oblique view from behind. Fig. 1.— Lateral view. Natural length, 0.75 millimeter. Fig. 2.— Antenna: 

 a, Antennal jotnt; 6, basal ring; c, supplementary Joint; d, basal membrane. Fig. 3. — Labrum and 

 clypeus, dorsal view: cl^ Clypeus. Fig. 4. — Antenna, epipharynx, and mouthparts: a, Dorsal tooth- 

 Uke thickening of mandible; b, ventral toothlLke thickening of same; c, thin chitinous waU between a 

 and 6; d, flat inner surface; ep, epipharynx; m, mentum; ma, maxiUary articulating area; sm, sub- 

 mentum. Fig. 5. — Maxilla: I, Timer lobe represented by stylus-like chitinization; g, outer lobe; 1, 

 basal joint of maxillary palp; 3, apical joint of same; 3, tactile papUlse. Fig. 6.— Labium: li, Ventral 

 side of hgula; /, basal joint of labial palp; .2, apical joint of same. Fig. 7. — TaU spur, outhne seen from 

 below. Fig. 9. — Lateral view. Natural length, 0.75 millimeter. Fig. 10. — Skin with prothoracic leg 

 (I). Fig. 11.— Skin with mesothoracic leg (II). Fig. 12.— Skin with metathoracic leg (III). Fig. 13.— 

 Lateral view. Natural length, 0.56 miUimeter. Drawn with same magnification as Figure 9. Fig. 

 14. — Right mandible, showing its interior or biting surface. Fig. 15. — Ventral mouthparts: Details of 

 ventral surface. Fig. 16. — Lateral view. Natural length, 10 millimeters. AH figures drawn by Adam 

 G. Boviag, except Figure S, which is by T. E. Snyder, and Figure 16, which is by Miss E. Armstrong. 



