PLATE X. 



All the drawings are by J. Henry Blake. Unless otherwise specified all the specimens drawn 

 isant, Colorado. 



Page. 



. Nosotetocus debilis , 90 



. Nosotetocus debilis 90 



. Nosotetocus vespertinus 90 



. Nosotetocus marcovi 91 



. Nosotetocus marcovi; antenna 91 



. Cytilus tartarinus 91 



. Corynibites velatus; elytra. Green Kiver, Wyoming 96 



. Psephenus lutulentus 94 



. Byrrhus romingeri 93 



. Amphicyrta inhsesa 91 



. Corymbites aethiops; prothorax. Hadley, Massachusetts 96 



. Adocetus buprestoides. Fossil, Wyoming 97 



