NO. 7 MUSCULATURE OF COLEOPTERA DORSEY 39 



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



muscles. 



44. Scotobates calcaratus (Fab.), Tenebrionidae (larva), dorsal view of 



head with part of integument removed to expose muscles. 



45. Same, ventral view of anterior portion of head with part of integument 



removed to expose muscles. 



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



Plate 9 



47. Byrrhus sp., Byrrhidae (larva), anterior portion of head with part of 



integument removed to expose muscles. 



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



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



muscles. 



50. Nosodendron californtcum Horn, Nosodendridae (adult), ventral view of 



head with part of integument removed to expose muscles. 



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



muscles. 



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



Plate 10 



53. Nosodendron calif ornicuni Horn, Nosodendridae (larva), dorsal view of 



head with part of integument removed to expose muscles. 



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



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



muscles. 



56. Helichus fastigiahts (Say), Dryopidae (adult), dorsal view of head with 



part of integument removed to expose muscles. 



57. Same, sagittal section of head slightly to th© left of median plane. 



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



muscles. 



Plate ii 



59. Ptilodactyla serricollis (Say), Ptilodactylidae (larva), dorsal view of 



head with part of integument removed to expose muscles. 



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



muscles. 



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



62. Chauliogii-athiis pennsylvanicus (Deg.), Cantharidae (adult), sagittal sec- 



tion of head slightly to the left of median plane. 



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



muscles. 



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



muscles. 



Plate 12 



65. Chauliognathus pennsylvanicus (Deg.), Cantharidae (larva), dorsal view 



of head with part of integument removed to expose muscles. 



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



muscles. 



