Bull. U. S. B. F., 1923-24. (Doc. 953.) 



Fia. 51. — Larva of Ci/bhter fimbriolatus, dorsal view. Fig. 52.— Larva of Thermonecffs bns-ilaris Fig. 53. — Larva of 

 Thermonecte^ oriiitic dli'^. Fig. 54. — Side view of head of basiiaris, showing deep penetration of dorsal eyes. Fig, 55.— 

 Mandible of adult beetle, T. basiiaris. Fig. 56.— The same, T. ornaticollis. 



