OF WASHINGTON. 



that nothing would be gained by broadening the definition, 

 and was glad to find that so many of the members agreed 

 with the treatment of the subject in the address. 



Under general notes and exhibition of specimens, Mr. 

 Schwarz stated, in connection with his remarks, at the November 

 meeting, on the food-habits of the genus Silpha, that our common 

 S. lapponica would have to be considered as an injurious species, 

 since according to the observations of Mr. H. F. Wickham this 

 insect is so injurious to dry salmon in northern British Columbia 

 that it is known among the Indians and white settlers as the 

 " salmon bug." S. lapponica is universally distributed through 

 out North America but is strictly boreal in the Old World. Its 

 distribution is, therefore, just the opposite in this respect from 

 that of S. opaca. 



Mr. Hubbard called attention to the mode of hibernation in 

 Chrysomela flavomarginata, which differs greatly frcm that 

 hitherto observed in North American species of Chrysomela and 

 Doryphora, in which hibernation takes place in the imago state. 

 Of C. flavomarglnata examples of the larvse, both young and 

 mature, as well as images, were found, on May 15, in their 

 winter quarters, among the roots of a species of Aster growing in 

 the mountains near Glenwood Springs, Colo., at an altitude of 

 six thousand feet. 



Mr. Ashmead presented the following: 



NOTES ON THE GENUS CENTRODORA. 

 By WILLIAM H. ASHMEAD. 



The genus Centrodora was erected by Dr. Arnold Forster in 

 Verb. pr. Rheinl. 1878, p. 66, to contain an interesting Chalcid 

 presenting some characteristics entirely different from any known 

 genus in the subfamily Ap/iclinincz. 



In the female, the ovipositor is very long, at least two-thirds 

 the length of the sessile, broadly oval abdomen ; the head is trans 

 verse, wider than the thorax, while the antennas are biannulate 

 with white. In the male the antennas are 6-jointed, with the scape 

 broadened and the front tibiaB distinctly thickened. 



Up to the present time only a single species is described, the 

 type Centrodora amoena Forster, taken June 3, in a room, on a 

 window. 



It is therefore with considerable pleasure that I announce the 

 discovery of a new species belonging to this genus in our fauna ; 



