THE CANADIAN ENTOMOLOGIST. 227 



inches in length ; the wings expand from one and one-eighth to one and 

 three-fourth inches. The males are from nine-sixteenths of an inch to 

 one and one-eighth inches long, with about the same expanse of wing. All 

 the above specimens were taken in the city, generally in the morning upon 

 the sidewalks or fences. The majority of them were under or near 

 maples, and one was taken upon a tree box, which has led me to think 

 that they may perhaps attack these trees, although I could find no evi- 

 dence of their having done so. Probably they may have issued from the 

 pine timber or lumber of which there is so much about the city. 



6. Urocerus albicornis Fab. I captured a female of this species on 

 the 22nd of Aug., and another on the 26th. Both specimens were taken 

 in the centre of the city, and about the same time other specimens were 

 observed flying up and down the street. One was seen to hover for some 

 time about a telegraph pole, and all the specimens seen were within fifty 

 yards of this pole. The insect was at some distance above the ground, so 

 that the pole at that point could not be inspected. The presence of the 

 insect on it may have been accidental, and all the specimens may have 

 flown from the lumber yards. 



7. Urocerus bizonatiis Stephens is a handsome species, larger and 

 stouter than the preceding one and readily distinguished by its yellow legs 

 and antennae, the yellow lumps behind the eyes, and the two yellow bands 

 across the abdomen, from which it derives its name. I cannot yet record 

 it as occurring here, although one day about the end of Aug. I saw upon 

 a house a Urocerus which appeared to be this species. It flew away, how- 

 ever, before I could closely observe or capture it. There is a specimen in 

 the collection of the late Mr. Billings, but it may not have been taken 

 here. Kirby (vol. 7, page 159) records it as taken in Lat. 65° and on the 

 journey from New York. I have received from British Columbia two fine 

 specimens taken by Mr. A. J. Hill, C. E., Can. Pac. Ry. Kirby gives the 

 length of his specimens as eighteen lines and their expanse of wing as 

 twenty-five lines. These are the measurements of my larger specimen ; 

 the length including the ovipositor, without which it is only an inch long. 

 Has the male been described ? I imagine it must be very similar in 

 appearance to the specimen described by Harris as U. abdominalis. 



The males of all the species seem to be rare, even those of our com- 

 monest species being seldom seen. 



