LARV.E OF THE PEIOXIX^. 23 



Fig. 5. — Diagrammatic lateral view of prionine larva. 

 amb. amp., ambulatory ampulla. 

 cly., clypeus. 

 fr., front. 



hyp., hypopleurum. 

 in. seg.\ intersegmental skin. 

 lah.. lab rum. 

 md., mandible. 



mx., maxilla. ^ 



pi. dis., pleural disc. 

 pi. z.. lateral, or pleural, zone. 

 pa. sc, parascutal area. 

 p. scl., postscutellum. 

 pi. tu., pleural tubercle. 

 p. n., pronotum. 



sf. sp., subfossal spine or process. 

 sp. a., spiracular area. 

 St., eusternum. 

 stl., sternellum. 



PLATE III. 



LarvvE of Prionine. 



Anterior parts of the head in various genera, and the form of epistoma, front, labrum, 

 and prothorax of Sphcnostethus and Parandra. 

 Fig. 1. — Tragosoma harrisii. 

 Fig. 2. — Mallodon dosystomiis. 

 Fig. 3. — Prionus laticollis. 

 Fig. 4. — Orthosoma brunneum. 

 Fig. 5. — Sphcnostethus taslei. 

 Fig. 6. — Parandra brunnea. 

 Fig. 7 .—Ergates spiculatus. 



PLATE IV. 



Larv.e of Prionine. . 



Modification of the mandibles in various genera. Note the molar part, which is 

 either a blunt process or flattened into a striated plate. 



Figs. 1 and 2. — Ergates spiculatus, lateral view of outer face and (2) inner face 



showing cutting edges. 

 Fig. 3. — Tragosoma harrisii, lateral view of outer face. 

 Figs. 4 and 5. — Parandra brunnea. 

 Figs. 6 and 7. — Orthosoma brunneum. 

 Figs. 8 and 9. — Prionus calif ornicus . 



PLATE V. 



Larv^ and Pupa of Prionine. 



Fig. 1. — OrthosowM brunneum. 

 Fig. 2. — Larva and pupa of Mallodon dasystomus. 

 Note the general form and texture of the body. Orthosoma is slender and its text- 

 ure is very shining, while Mallodon is more robust and very dull. Twice enlarged. 



PLATE YI. 



Larv^ of Prionine. 



Fig. 1. — Prionus laticollis. 

 Fig. 2. — Ergates spiculatus. 

 Note tapering form of Prionus as compared to robust cylindric form of Ergates: 

 also, the dorsal ampullae of Ergates and their rugose texture. Twice enlarged. 



