THE MOUTH-PARTS OF SOME BEETLE LARVAL 
395 
EXPLANATION OF PLATES 35-37, 
Illustrating the paper by Prof. George H. Carpenter and Miss 
Mabel C. MacDowell on “The Mouth-Parts of some 
Beetle-Larvae (Dascillidas and Scarabaeidae), with Especial 
Beference to the Maxillulae and Hypopharynx.” 
PLATE 35. 
Helodes — Larva. 
Fig. 1. — Right mandible (ventral view) of very young larva. X 130. 
Fig. 2.— Right mandible of older larva. X 130. 
Fig. 3. — Left mandible (dorsal view) of full-grown larva. X 130. c. 
c 3 . Condyles, g. Ginglymus. mp. Pars molaris. h. Hairs, pr. Comb- 
like process, ad. Adductor muscle. 
Fig. 4. — Cone-like process on mandible (ventral view), x 400. 
Fig. 5. — Tip of tufted hair on mandible. X 800. 
Fig. 6. — Molar surface of mandible, x 300. 
Fig. 7. — Left maxilla (ventral view). X 130. crd. Cardo. stp. Stipes. 
pip. Palp. ga. Galea, la. Lacinia. in. Adductor muscle. 
Fig. 8. — Apex of left lacinia. x 300. 
Fig. 9. — Two types of hairs on galea. X 400. 
Fig. 10. — Ventral head skeleton, with dotted outline of left mandible. 
xl30. Ibr. Labrum. an. Base of antenna. c x , c 2 . Mandibular con- 
dyles. c 3 . Condyle on head-capsule, ten. Tentorium. 
Fig. 11. — Labium, maxillulae and hypopharynx (dorsal view). X 130. 
mxl. Maxillula. hyp. Hypopharynx. lb. Labium, sin. Submentum. 
nit. Mentum. lb. pip. Labial palp. con. Condyle on hypopharynx. 
t v Teeth on maxillula. t. 2 . Teeth on tongue. 
Fig. 12. — Apex of left maxillula. x 300. 
PLATE 30. 
Dascillus cervinus — Larva. 
Fig. 13. — Left mandible (ventral view), x G5. 
Fig. 14. — Right mandible (dorsal view), x 65. 
Fig. 15. — Molar surface of mandible (internal view), showing insertion 
of tendon of adductor muscle. x 05. ps. Prostlieca. t. Posterior 
tooth, sp. Triangular space, mp. Pars molaris. pr. Sensory process. 
