38 SMITPISONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



19. Same, sagittal section of head slightly to the left of median plane. 

 ■ 20. Amara sp., Carabidae (larva), ventral view of labium with part of 

 integument removed to expose muscles. 



21. Same, dorsal view of head with part of integument removed to expose 



muscles. 



22. Same, sagittal section slightly to the left of median plane. 



Plate 5 



23. Dinetttes discolor Aube, Gyrinidae (adult), sagittal section of head 



slightly to the left of median plane. 



24. Same, dorsal view of head with part of integument removed to expose 



muscles. 



25. Same, ventral view of labium with part of integument removed to expose 



muscles. 



26. Dinetites sp., Gyrinidae (larva), dorsal view of head with part of integu- 



ment removed to expose muscles. 



27. Same, ventral view of labium with part of integument removed to expose 



muscles. 



28. Same, sagittal section of head slightly to the left of the median plane. 



Plate 6 



29. Silpha amcricana L., Silphidae (adult), dorsal view of head with part 



of integument removed to expose muscles. 



30. Same, ventral view of head with part of integument removed to expose 



muscles. 



31. Same, sagittal section of head slightly to the left of median plane. 



32. Silpha am-ericana L., Silphidae (larva), dorsal view of head with part 



of integument removed to expose muscles. 



33. Same, ventral view of labium with part of integument removed to expose 



muscles. 



34. Same, sagittal section of head slightly to the left of median plane. 



Plate 7 



35. Sphaeridium scarabaeoidcs L., Hydrophilidae (adult), dorsal view of head 



with part of integument removed to expose muscles. 



36. Same, ventral view of head with part of integument removed to expose 



muscles. 

 27. Same, sagittal section of head slightly to the left of median plane. 



38. Sphaeridium bipusttdatum Fabr., Hydrophilidae (larva), dorsal view of 



head with part of integument removed to expose muscles. 



39. Same, sagittal section of head slightly to the left of median plane. 



40. Same, ventral view of labium with part of integument removed to expose 



muscles. 



41. Scot abates calcaratus (Fab.), Tenebrionidae (adult), modified sagittal 



section of head slightly to the left of median plane. 



Plate 8 



42. Scotobates calcaratus (Fab.), Tenebrionidae (adult), ventral view of 



head with part of integument removed to expose muscles. 



