THE CANADIAN ENTOMOLOGIST. 303 



Boring in vines and creeping plants. 

 In the stems : 



Squash, Pumpkin, and other Cucurbs Melittia satyriniforviii. 



Big-root ( Megarrhiza) " gloriosa. 



In roots : 



Grapevine Memythrus polisti/ortnis. 



Clematis Alcaihoe caiidata. 



Clematis " korites. 



Herbaceous perennial plants. 

 In roots : 



Strawberry Sesia rutilans. 



In stem : 



Eupatoriu7n Sesia histrans. 



In borings of other insects : 



Oak-gall (Andricus coriiigerus) Sesia scittila. 



Oak-gall (Andricus cornigerus) " rtibristigma. 



Gall on Live Oak " querci. 



Gall on Oak " sapygcBformis. 



Gall on Mesquite " prosopis. 



Gall of Saperda concolo?- " albicornis. 



Gall of Saperda concolor Afetnyt/irus tricindus. 



NOTES ON COLORADO BEES. 



BY E. S. G. TITUS, FORT COLLINS, COLO. 



The following table is intended to serve as a means of separating 

 the species of the genus Agapostemon, Smith, occurring in Colorado : 

 Body green or blue-green. 



A. Abdomen unicolorous with body. 



B. Mesonotum with double punctuation Texanus, Cress. 9 • 



BB. Mesonotum with confluent punctures, metathorax longitudi- 

 nally rugose radiatus, Say. % . 



AA. Abdomen differing in colour from body. 

 B. Abdomen black. 



C. Abdomen yellow banded. 

 D. With five bands. 



E. Last ventral segment with a median 



carina viridulus. Fab. S- 



EE. Last ventral segment without a median 



carina Texanus, Cress. S • 



