196 Young Larvae o/Lyctus brunneus Stepli. 



Hopkins, A. D. (1909). Some Insects injurious to Forests. Insect depredations in 



North American Forests. Bull. No. 58, p. 66. Part V. U.S. Dept. Agric, Bur. 



Ent., Washington, D.C. 

 MuNRO, J. W. (1915-1916). The larvae of the Furniture Beetles. Fams. Anobiidae 



and Lyctidae. Proc. Roy. Phys. Soc. Edinburgh, xix. Parts Nos. 8 and 9. 

 Packard, A. S. ( 1909). A Text-book of Entomology. New York. 

 Perris, Ed. (1876). Larves des Col6opteres. Ann. Soc. Linn, de Lyon, Tome xxni. 



pp. 60-63, figs. 247-250. 

 ScHiODTE, J. C. (1861-83). De Metamorphosi Eleutheratum Observationes : Bidrag til 



Insekternes Udviklingshistorie. 12 parts. 3 vols. Copenhagen. 

 Xambeu (1898). Moeurs et Metamorphoses du Lyctus canaliculatiis Fabricius. 



Bull. Soc. Sci. Nat. VOuest France, Tome \aii. pp. 69-72. 



EXPLANATION OF TEXT-FIGURES 1 AND 2 



REFERENCE LETTERING. 



a, antenna; a^, a^, apical joints of antenna; an, anus; b, basal joint of antenna; br, 

 brush-like group of setae on crushing organ ; cr, crushing organ of mandible ; e, eye ; es, epi - 

 cranial suture; /«, frons; fs, frontal suture; y, epipleural lobe; h, sternal lobe; hr, semi- 

 circular rod of chitin supporting upper region of head; hs, hatching spines; la, labium; 

 lb, labrum; Ic, lacinial lobe; li, ligula; lu, piece of chitin forming lumen for crushing organs; 

 md, mandible; me, mesothorax; tnn, mentum; mr, molar or distal joint of mandible; 

 msl, meso-thoracic leg; mt, metathorax; mtl, meta thoracic leg; oc, occipital foramen; 

 pi, pro-thoracic leg; pt, pro-thorax; rd, rod; si, stipes; sm., submentum; tr, spiracle; va, 

 vaginant membrane; x, scutal lobe; z, scutellar lobe; 1-10, abdominal segments. 



TEXT-FIG. 1. 



1. First instar larva. Camera lucida x 80. 



2. (A) Dorsal aspect of head. C.I. x 128. 

 (B) Lateral aspect of antenna. C.l. x 177. 



3. Mandibles: (I) Latero-anterior; (II) Dorsal; (III) Crushing organ and brush of full- 



grown larva; (IV) Inner lateral; (V) Outer lateral. C.l. x 132. 



4. Ventral aspect of maxillae of 2nd Instar larva. C.l. x 177. 



5. Legs of larva, left. C.l. x 132. 



6. Apex of abdomen, segments 7-10. C.I. x 132. 



TEXT-FIG. 2. 



1. Second instar larva. Camera lucida x 80. 



2. (A) Dorsal aspect of head. C.l. x 128. 

 (B) Lateral aspect of antenna. C.l. x 177. 



3. Legs of larva, left. C.l. x 132. 



4. Apex of abdomen, 8-10, and part of 7. C.l. x 128. 



5. Transverse section of proventriculus of full-grown larva. C.l. x 80. 



6. Optical longitudinal section of proventriculus of full-grown larva. Drawn from photo- 



micrograph. x80 (approx.). 



{Received May 2Qth, 1922.) 



